Accueil
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH . Vol. 21, N° 2Mention de date : 03/2024Paru le : 29/04/2024 |
Dépouillements
Ajouter le résultat dans votre panierRecent development advances in bio-based powder coatings : a review / Dominika Czachor-Jadacka in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Recent development advances in bio-based powder coatings : a review Type de document : texte imprimé Auteurs : Dominika Czachor-Jadacka, Auteur ; Kevin M. Biller, Auteur ; Barbara Pilch-Pitera, Auteur Année de publication : 2024 Article en page(s) : p. 435-444 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux
Durée de vie (Ingénierie)
Matières plastiques -- Recyclage
Polyéthylène téréphtalate
Produits et matériaux recyclés
Ressources renouvelables
Revêtements poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : Sustainability has increasingly become a cornerstone of the chemical industry. Sustainability metrics include low volatile organic compound (VOC) content, high efficiency, low toxicity, low energy requirements, minimal waste, recyclability, durability, and the use of renewable feedstocks. Powder coatings are well known for zero VOCs, efficient utilization, low toxicity, and recyclability. Powder coating technologists have recently ventured into the use of renewable feedstocks to synthesize binder systems. Bio-based compounds have been successfully used to produce highly sustainable powder coatings. This review presents recent research on new binder components designed for powder coatings, including: (poly(limonene carbonate)s; polyester resins; polyamide resins; and crosslinking agents (urethane-acrylates, blocked polyisocyanates). The applications of bio-based materials in powder coatings are also highlighted in this review. Note de contenu : - The powder coating manufacturing process
- Bio-based powder coatings
- Recent developments in bio-based powder coating : Academia research - Industry research - Possible drawbacks of bio-based powder coatingsDOI : https://doi.org/10.1007/s11998-023-00849-5 En ligne : https://drive.google.com/file/d/1NZLET35VgwbIQjvKGbUDsQy4bZjHn931/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40768
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 435-444[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Cathodic protection shielding of coated buried pipeline / Abdelkader Meroufel in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Cathodic protection shielding of coated buried pipeline Type de document : texte imprimé Auteurs : Abdelkader Meroufel, Auteur ; Andrew Gordon, Auteur ; Dominique Thierry, Auteur Année de publication : 2024 Article en page(s) : p. 445-459 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Polyéthylène
Protection cathodique
Revêtement époxy lié par fusion
Revêtements multicouches
Revêtements organiques
TuyauterieIndex. décimale : 667.9 Revêtements et enduits Résumé : During the 2000s, the concept of cathodic protection (CP) shielding was first raised in open literature and remains debated between coatings professionals. The mechanism of CP shielding, and its understanding continue to be studied for different coatings with different approaches and using various techniques. From the CP shielding factors to the assessment methods, the published literature merits a deep analysis to capture the established knowledge and identify the research gaps to further tackle the issue for reliable coated buried structures. A holistic approach to this topic seems necessary where coatings ageing, cathodic protection, electrochemistry, and transport processes should be considered. In the first part of the present review, the recent works related to the understanding of CP shielding, coatings properties were considered before discussing the mechanisms involved underneath coatings. Transport phenomena and their relationship with cathodic protection performance in the presence of chemical and microbiological processes are discussed in the second part. Finally, CP shielding assessment methods and modeling works are presented and discussed from different perspectives. Note de contenu : - Cathodic protection shielding
- Buried pipelines coatings
- Fusion bonded epoxy
- Three-layer polyethylene
- Field applied tapes
- Cathodic protection knowledge update
- Table 1 Coating shielding behavior according to literature
- Table 2 Generic external coating systems for carbon steel pipe for underground and submerged pipe. Adapted from the literature
Mechanisms beneath disbonded coatings
Modeling studiesDOI : https://doi.org/10.1007/s11998-023-00850-y En ligne : https://drive.google.com/file/d/1ShEf0E80i00eowmbIowj9P31g96-FUm-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40769
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 445-459[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible A review of high-quality epoxy resins for corrosion-resistant applications / Shams Anwar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : A review of high-quality epoxy resins for corrosion-resistant applications Type de document : texte imprimé Auteurs : Shams Anwar, Auteur ; Xianguo Li, Auteur Année de publication : 2024 Article en page(s) : p. 461-480 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Chimie analytique
Composites à fibres de carbone
Copolymère phénolique époxy
Copolymère urushiol formaldéhyde
Electrochimie
Oxyde de graphène
Revêtements -- Détérioration
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Corrosion is a significant challenge in many practical applications, leading to the deterioration of metal infrastructure and equipment. A literature review indicates that various epoxy resins (ERs) and epoxy phenolic resins (EPRs) based coatings are available and are effectively applied on steel and aluminum surfaces for protection against a corrosive environment. The corrosion-resistant performance of ERs and EPRs can be further improved by incorporating numerous chemical compounds through improved bonding, such as inorganic compounds and carbon-based materials, e.g., zinc oxide (ZnO), titanium dioxide (TiO2), silicon dioxide (SiO2), carbon fiber, carbon nanotube (CNTs) and graphene oxide (GO). Surface heterogeneity (surface pores) of coatings contributes to reduced corrosion protection as corrosion species can diffuse to these inconsistencies and break the coating structure of the organic coating. However, after over a hundred years of research and development, the degradation/failure mechanism of organic coatings is still under study. This paper provides an overview of the current state-of-the-art knowledge of the numerous protective organic coatings and coating approaches and examines coating performance and mechanism for the coating degradation and failure in a corrosive environment. Finally, a summary is presented on the understanding of the mechanisms and challenges associated with, and critical factors influencing, coating durability and predictive formulation against coating damage. Note de contenu : - DEGRADATION MECHANISM OF ORGANIC COATINGS : Ionic migration - Conduction route development
FUNDAMENTAL OF EPOXY RESINS (ERS) : Bisphenol ERs - Cycloaliphatic ERs - Novolac ERs - Trifunctional and tetrafunctional ERs - Halogenated ERs
- Fundamentals of epoxy phenolic resins (EPRs)
- EPOXY-BASED POLYMER COMPOSITES : Inorganic polymer composites - Thermoplastic polymer composites - Carbon fiber composites - Carbon nanotube composites - Graphene oxide (GO) with urushiol-formaldehyde composites
- CORROSION-RESISTANT EPOXY RESIN COATINGS
- FUTURE RESEARCH AND RECOMMENDATIONSDOI : https://doi.org/10.1007/s11998-023-00865-5 En ligne : https://drive.google.com/file/d/1UZvCznuLdXEbcwwUikB0OJiVBulmBaw2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40770
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 461-480[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Numerical and experimental investigation on formation of the film for different die lip configurations in lithium-ion battery electrode slot-die coating / Xiaosong Gong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Numerical and experimental investigation on formation of the film for different die lip configurations in lithium-ion battery electrode slot-die coating Type de document : texte imprimé Auteurs : Xiaosong Gong, Auteur ; Jie Han, Auteur ; Fei Yan, Auteur ; Xiaozhong Du, Auteur Année de publication : 2024 Article en page(s) : p. 481-492 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Accumulateurs lithium-ion
Bordure -- Défauts
Enduction par filière
Modèles numériques
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : The slot-die coating is the most commonly used manufacturing method for producing lithium-ion battery electrodes. However, how to achieve high surface consistency for electrodes still confronts one challenge. In this research, the slot coating processes with different die lip configurations were carefully investigated using numerical and experimental methods. The motion pattern, internal flow structure of the coating bead, and coating uniformity were explored during the coating process of lithium battery cathode slurry. The low-flow limit at different coating gaps was also determined by combining the viscous capillary model and numerical methods, which was in good agreement with experimental results. The results showed that a smaller coating gap controlling the upstream meniscus between the upstream die lip and slot exit was favorable to the coating uniformity. For the same thickness films, a larger coating gap was apt to increase formation of edge defects. However, the coating speed had little effect on the edge height. The evolution of flow structure for the coating bead (parabolic-sharp angle-diagonal) under different processes was investigated by tracking the particle trajectories during the coating process. It can provide theoretical guidance for the fabrication of high-quality electrodes. Note de contenu : - NUMERICAL METHOD : Governing equations - Numerical model and boundary conditions - Viscous capillary model
- RESULTS : Low-flow limits at different coating gaps - Wet coating thickness profile and uniformity - Velocity profiles - Coating bead flow structure
- EXPERIMENTAL SETTINGDOI : https://doi.org/10.1007/s11998-023-00874-4 En ligne : https://drive.google.com/file/d/1lmXQq9cyjqEdeit2ZMSyyPTA6ePifA_o/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40771
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 481-492[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible High-speed slot-die coating of primer layers for Li-ion battery electrodes : model calculations and experimental validation of the extended coating window depending on coating speed, coating gap and viscosity / Sandro Spiegel in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : High-speed slot-die coating of primer layers for Li-ion battery electrodes : model calculations and experimental validation of the extended coating window depending on coating speed, coating gap and viscosity Type de document : texte imprimé Auteurs : Sandro Spiegel, Auteur ; Alexander Hoffmann, Auteur ; Julian Klemens, Auteur ; Philip Scharfer, Auteur ; Wilhelm Schabel, Auteur Année de publication : 2024 Article en page(s) : p. 493-505 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Accumulateurs lithium-ion
Caractérisation
Enduction par filière
Primaire (revêtement)
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : In the battery industry, very thin primer layers are used to improve electrode adhesion on substrates or act as blocker layers to prevent corrosion in case of aqueous cathodes. For these material configurations, high-speed coating is mandatory to ensure the economic viability of the process. One way to realize high-speed coating is a set-up including a slot die and a vacuum box to stabilize the coating bead. Knowledge and prediction of the coating window of thin wet film thicknesses is crucial to design the production process. Therefore, the influence of coating gap and viscosity of shear-thinning fluids on the coating window is investigated with the help of various model fluids. In addition, a prediction model for the calculation of the coating window for high-speed slot-die coating with vacuum box is developed. This model is shown to be valid for the prediction of the coating window for the investigated material systems and coating gaps over the investigated range of coating speeds up to 500 m min−1. For a material system, which corresponds to a real material system for adhesive primer coatings, it is possible to reach a target wet film thickness of 20–25 µm. This would correspond to a layer thickness of 0.5 µm for a solid content of 2–2.5 wt%. Note de contenu : - EXPERIMENTAL METODS AND MATERIALS : Slurry preparation -
Experimental coating set-up and coating window characterization
- RESULTS AND DISCUSSION : Prediction of process stability
systems - Validation of the model
- Table 1 : Calculated factors and exponents of equation
- Table 2 : CMC content of the used model fluids
- Table 3 : Power-law parameters of the investigated material
- Table 4 : Ranges of shear rate of the investigated coating gaps and coating speedsDOI : https://doi.org/10.1007/s11998-023-00877-1 En ligne : https://drive.google.com/file/d/17hIPyd8QtYMw8OWK2qCN7fv_6bZaCokf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40772
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 493-505[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Preparation of UV-curable waterborne poly(thiourethane-urethane) acrylate based on thiol-click chemistry in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Preparation of UV-curable waterborne poly(thiourethane-urethane) acrylate based on thiol-click chemistry Type de document : texte imprimé Année de publication : 2024 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Chimie click
Copolymère uréthane-urée
Enrobage (technologie)
Photoréticulation
Polymères -- Synthèse
Revêtements -- Propriétés mécaniques
Revêtements en phase aqueuse
Revêtements en phase aqueuse -- Séchage sous rayonnement ultraviolet
Revêtements organiques
ThiolsIndex. décimale : 667.9 Revêtements et enduits Résumé : New strategies for synthesizing click chemical reactions have been studied and widely used in the synthesis of functional polymers. In this paper, based on thiol-click chemistry, thiocarbamate bonds and thioether bonds were introduced into the polymer skeleton, and then pentaerythritol tetraacrylate (PETTA) was introduced into the system to form an interpenetrating network structure (IPN). A new type of waterborne poly(thiourethane-urethane) acrylate (WPTUA) coating with strong toughness, high hardness, and rapid curing was obtained. Under the condition of an organotin catalyst, a WPTUA composite dispersion was prepared by using isophorone diisocyanate and polycarbonate diol as monomers, 2-dimethylol propionic acid as a hydrophilic chain extender, trimethylolpropane tris(3-mercaptopropionate) (TMPMP) and PETTA. The molecular structures of intermediate waterborne poly(thiourethane-urethane) (WPTU), WPTUA oligomers and UV-cured polymers were investigated by FTIR spectroscopy and Raman spectroscopy. The effects of the content of TMPMP and PETTA on the properties of WPTUA, including dispersion stability, thermal properties, mechanical properties, water resistance, hardness, and toughness, were investigated. It is found that when the WPTUA dispersion has 16 wt% TMPMP and 28 wt% PETTA, the prepared films have high hardness, significant water resistance and good thermal stability for coating applications on delicate substrates, such as paper, plastic and wood. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of WPTU emulsion - Synthesis of WPTUA dispersion - Synthesis of WPUA dispersion - Preparation of UV curing film and UV curing coating - Characterization
- RESULTS AND DISCUSSION : Characterization of the WPTU and WPTUA - Effect of TMPMP content on material properties - Study of the photocuring process - Coating performance - Thermal gravimetric analysis - Storage stability of WPTU and WPTUA dispersions
- Table 1 : The mass ratio of WPTU and WPTUA
- Table 2 : Mechanical properties of WPTU films
- Table 3 : Properties of UV-WPTU films
- Table 4 : TGA and DTG data of cured WPTUADOI : https://doi.org/10.1007/s11998-023-00744-5 En ligne : https://drive.google.com/file/d/18AGyITyj-qx0SVOsgLMxAQxTYIvNsWFV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40773
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024)[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible A polyurethane coating using CoMOF-BTA metal-organic framework for active protection of AA2024-T3 / Izuchukwu K. Nwokolo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : A polyurethane coating using CoMOF-BTA metal-organic framework for active protection of AA2024-T3 Type de document : texte imprimé Auteurs : Izuchukwu K. Nwokolo, Auteur ; Hongwei Shi, Auteur ; Alexander I. Ikeuba, Auteur ; Wanyu Zhang, Auteur ; Fuchun Liu, Auteur ; En-Hou Han, Auteur Année de publication : 2024 Article en page(s) : p. 521-535 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages
Anticorrosifs
Anticorrosion
Caractérisation
Electrochimie
Essais d'adhésion
Essais de brouillard salin
Polyuréthanes
Revêtements organiques
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : CoMOF-BTA, a new metal-organic framework with inherent corrosion inhibition ability was prepared via a one-step solvothermal process and characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and thermal analyses. Immersion and polarization tests were conducted to evaluate the ability of CoMOF-BTA to resist corrosion on AA2024-T3 alloy in NaCl solution. In addition, CoMOF-BTA particles were incorporated into polyurethane coatings to produce active anti-corrosion coatings, whose corrosion protection capabilities were assessed using electrochemical methods and salt spray analysis. The impedance results show that polyurethane coatings containing CoMOF-BTA have coating resistances (Rcoat) that are around two orders of magnitude higher than that without the CoMOF-BTA particles. The salt spray analysis also indicates the corrosion protection ability of coatings containing CoMOF-BTA particles after a long period of exposure. The results demonstrate that CoMOF-BTA improved the ability of AA2024-T3 to resist corrosion and confirm the anti-corrosion properties of CoMOF-BTA-laden coatings by the controlled release of BTA molecules in NaCl solution. This study offers a new anti-corrosion MOF material and active coating for the protection of aluminum alloys against corrosion. Note de contenu : - MATERIALS AND METHODS : Material - Synthesis of CoMOF-BTA - Characterization - Immersion tests on bare sample - Electrochemical tests - Adhesion test - Salt spray experiment
- RESULTS AND DISCUSSION : Characterization - Corrosion resistance of CoMOF-BTA on AA2024-T3 - Effects of CoMOF-BTA on polyurethane coating
- Table 1 : Chemical composition of Aluminum alloy 2024-T3 in wt.%
- Table 2 : Fitting results of polarization curves of the bare AA2024-T3 samples immersed in 3.5 wt.% NaCl and the extract solution of 2 wt. % CoMOF-BTA at 298 KDOI : https://doi.org/10.1007/s11998-023-00835-x En ligne : https://drive.google.com/file/d/1GL8tpOMjfMRArOUVCjXERSlwLlTivmve/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40774
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 521-535[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Path planning algorithm for laser removal of paint from aircraft skin / Jie Liang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Path planning algorithm for laser removal of paint from aircraft skin Type de document : texte imprimé Auteurs : Jie Liang, Auteur ; Zhichao Wang, Auteur ; Jianshe Gao, Auteur ; Kun Gao, Auteur Année de publication : 2024 Article en page(s) : p. 537-546 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Avions -- Revêtements:Avions -- Peinture
lasers
Revêtements -- Décapage:Peinture -- DécapageIndex. décimale : 667.9 Revêtements et enduits Résumé : Laser paint removal technology has recently been used in aircraft maintenance because this technology is highly efficient, contact free and environment-friendly. This work proposes a tool path planning algorithm based on maximum defocus length, the distance between laser focus and the skin surface, that decreases the path points and the path length. Fewer interpolation points can generate smoother trajectory acceleration curves, reducing robot vibration and mechanical wear and improving robot response speed and accuracy to the planned path. Firstly, the STL (standard tessellation language) surface model of the aircraft metal skin is sliced using the section plane group to obtain the initial laser paint removal path. Secondly, the maximum defocus length is obtained by laser paint removal experiments on the skin. Thirdly, the initial path is optimized based on the path optimization algorithm of the maximum defocus length. Finally, a robotic paint removal verification experiment using the optimized path is conducted on a 0.0336 square meter section of a DR-5 unmanned aerial vehicle (UAV), composed of 2024-T6 aluminum. The results show that the application of this algorithm can remove the paint layer from the aircraft skin and decrease the path interpolation points by 96.2%. Note de contenu : - Path generation for laser paint removal : Initial path generation by slicing the STL model - Path optimization based on defocus length
- Experiment setup : Materials and equipment - The acquisition of the maximum defocus length - Verification experiment
- DISCUSSION : Analysis of the paint removal ratio - Analysis of the path points - As can be seen in Table 4, the number
- Table 1 : The main laser parameters
- Table 2 : Laser processing parameters
- Table 3 : Paint thickness removal ratio with the different defocus lengths
- Table 4 : The contrast of paths before and after optimizationDOI : https://doi.org/10.1007/s11998-023-00836-w En ligne : https://drive.google.com/file/d/1d19GlBoAHOKa25DEx3V_r2LRUMGfG8dn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40775
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 537-546[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Development of an epoxy-based self-intumescent fire protective coating containing an appropriate mass ratio of APP and Cu2O / Chengshou Zhao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Development of an epoxy-based self-intumescent fire protective coating containing an appropriate mass ratio of APP and Cu2O Type de document : texte imprimé Auteurs : Chengshou Zhao, Auteur ; Yisong Jiang, Auteur ; Wang Fu, Auteur ; Zhuangyuan Liu, Auteur ; Siyuan Liu, Auteur ; Huaqiao Peng, Auteur ; Nima Esmaeili, Auteur Année de publication : 2024 Article en page(s) : p. 547-558 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Caractérisation
Epoxydes
Formulation (Génie chimique)
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Intumescence (chimie)
Métaux -- Revêtements protecteurs
Oxyde de cuivre
Polyphosphate d'ammoniumIndex. décimale : 667.9 Revêtements et enduits Résumé : A novel epoxy-based self-intumescent fire protective coating has been developed by formulating a combination of ammonium polyphosphate (APP) and copper (I) oxide (Cu2O) in epoxy resin (EP). The effects of various combinations on fire protective performance for steel plate were evaluated using a lab-scale simulated big panel test. Formulations with different mass ratios of APP to Cu2O ranging from 10:0 to 2:8 exhibit good fire protective performance for steel plate. While the final equilibrium backside temperature of un-protected steel plate reached 529 °C, it did not exceed 282 °C for the protected plates with 2 mm thick coatings, which is much lower than the failure temperature of steel (ca. 500 °C). The lowest final equilibrium backside temperature of coated steel plate was 234.5 °C for the optimal formulation (EP/24APP/16Cu2O) with an APP/Cu2O mass ratio of 6/4 in EP. Interestingly, the limiting oxygen index (LOI) value (46.8%) for the optimized formulation (EP/24APP/16Cu2O) is not the highest, being lower than those of (EP/40APP/0Cu2O) and (EP/32APP/8Cu2O) formulations. The fire behavior of the optimized formulation (EP/24APP/16Cu2O) and control EP was compared using the cone calorimetry. The main fire hazard parameters such as peak heat release rate, total smoke production and peak CO production for EP/24APP/16Cu2O are reduced by 80.0%, 59.5% and 75.0%, respectively, relative to those for EP. This indicates that the EP/24APP/16Cu2O formulation provides significantly better fire safety than does control EP alone. A possible mode of action for the combination of APP/Cu2O in terms of the expansion ratio and heat insulation degree of the formed intumescent char layer may be proposed. Thus, this work contributed a reference for developing intumescent fire protective coating with high fire safety. Note de contenu : - EXPERIMENTAL : Materials - Coating preparation - Characterization
- RESULTS AND DISCUSSION : Fire protection - Flame retardance - Combustion performance - Possible fire protective action mode
- Table 1 : Formulations of different coatings
- Table 2 : Cone calorimeter parameters of EP and EP/24APP/16Cu2ODOI : https://doi.org/10.1007/s11998-023-00837-9 En ligne : https://drive.google.com/file/d/1ima9p-v-zHkpIR2kHCr_ft89fzeZ3UFm/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40776
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 547-558[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Hybrid epoxy-SiO2/GO nanosheets anti-corrosive coating for aeronautic aluminum Al6061-T5 / Jevet E. D. López-Campos in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Hybrid epoxy-SiO2/GO nanosheets anti-corrosive coating for aeronautic aluminum Al6061-T5 Type de document : texte imprimé Auteurs : Jevet E. D. López-Campos, Auteur ; José Mojica-Gómez, Auteur ; Alfredo Maciel-Cerda, Auteur ; Víctor M. Castano, Auteur ; Genoveva Hernandez-Padron, Auteur Année de publication : 2024 Article en page(s) : p. 559-574 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Anticorrosifs
Anticorrosion
Avions -- Revêtements
Caractérisation
Couches minces
Dioxyde de silicium
Epoxydes
Essais accélérés (technologie)
Essais dynamiques
Métaux -- Revêtements protecteurs
Mouillabilité
Oxyde de graphène
Revêtements organiques
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The mechanical and anti-corrosive evaluation of a hybrid epoxy resin–SiO2 and graphene oxide (GO) are presented. Three composite materials were prepared with 0%, 0.1 wt% and 0.5 wt% GO concentrations. The hybrid material was prepared by the sol-gel process incorporating the silica particles in situ within the epoxy resin (ER) matrix and previously that ER was functionalized with carboxyl groups using abietic acid and labeled as functionalized epoxy resin. The deposition of the three hybrids in aluminum 6061 substrates was made by blade coating, measuring wet and dry film thickness. The study of mechanical properties involved adhesion, pencil scratch hardness, and abrasion test methods where the incorporation of 0.5 wt% of GO improved the mechanical properties considerably. The anti-corrosive properties of the coatings were evaluated through electrochemical impedance spectroscopy and accelerated corrosion using a salt spray chamber showing that GO forms an anti-corrosive barrier increasing the operation life of the coatings in corrosive environments. Anti-ice properties were related to the contact angle measurement from which the GO concentrations showed more hydrophobic behavior. All the tests were carried out according to ASTM standards. The incorporation of 0.5% of GO showed a significant improvement in the mechanical and anti-corrosive results, improving corrosion resistance up to 500 h. The abrasion tests had an increase in 35%, its hardness up to 9H, and the wear index improved by 29.14% compared with composites with 0.1 wt% of GO and without GO. The HREF1 and HREF5 materials do present an increase in the contact angle thanks to the incorporation of graphene oxide. The results of electrochemical impedance spectroscopy and the impedance curves show a better behavior for the HREF5 composite due to the difference in resistance over time. Note de contenu : - MATERIALS
- METHODOLOGY : Synthesis - Preparation of aluminum substrates - Preparation of hybrid coatings
- CHARACTERIZATION : Mechanical tests - Corrosion test
- RESULTS AND DISCUSSION : GO nanosheets characterization - Spectroscopic coatings characterization - SEM characterization - Mechanical characterization - Accelerated corrosion - Electrochemical impedance spectroscopy (EIS) - Corrosion mechanism - Wettability
- Table 1 : Adhesion, hardness, and abrasion results for specific thickness (*2 mm grid cut for thickness greater than 50 um)
- Table 2 : Wear index calculations (ASTM D4060-19)
- Table 3 : EIS equivalent circuit model results for each element for the hybrid coatingsEn ligne : https://drive.google.com/file/d/1vVrKHAq6wLEyjcDRsFRd3njuCVAu_c1u/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40777
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 559-574[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible POSS-vinyl-urethane acrylate-based nanohybrid coating materials / Yasemin Eren in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : POSS-vinyl-urethane acrylate-based nanohybrid coating materials Type de document : texte imprimé Auteurs : Yasemin Eren, Auteur ; Ferhat Sen, Auteur ; Suzan Abdurrahmanoglu, Auteur ; Sevim Karatas, Auteur Année de publication : 2024 Article en page(s) : p. 575-587 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère uréthane acrylique
Formulation (Génie chimique)
Matériaux hybrides
Polymères -- Propriétés chimiques
Polymères -- Propriétés thermiques
Réaction thiol-ène
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Silsesquioxanes oligomères polyhèdresIndex. décimale : 667.9 Revêtements et enduits Résumé : The effect of POSS-vinyl-heptaisobutyl-substituted (POSSV) compounds as an inorganic additive on the thermal and physical properties of nanohybrid coating materials based on urethane acrylate (UA) resin has been investigated. A diol compound obtained from the reaction of itaconic acid and 1,2-epoxy cyclohexane has been used to produce an UV curable epoxy-based urathane acrylate resin. Nanohybrid coating materials were obtained by curing the UA resin with UV radiation through the thiol–ene reaction, mixed with various amounts of POSSV compounds. The structure of the UA resin was characterized by Fourier-transform infrared spectroscopy and nuclear magnetic resonance spectroscopy techniques. The UV curing process was also studied by the double bond conversion method. Aggregation of the nanohybrid materials was determined by X-ray diffraction. The thermal, non-flammability, and thermomechanical properties of the samples were examined by thermogravimetric analysis, limiting oxygen index, and dynamic mechanical analysis techniques. Light transmittance of the samples was determined by UV–Vis spectrophotometry, and their morphological structure was determined by scanning electron microscopy. In addition, gel contents, swelling rates, hardness, adhesion, contact angles, and resistance to chemicals and solvents of the samples were examined. In conclusion, nanohybrid materials obtained from the synthesized UA resin and improved with POSSV additive can be used in the coating industry. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of epoxy-based urethane acrylate resin - Preparation of UV curable nanohybrid coating materials - Characterization
- RESULTS AND DISCUSSION : Structures characterization of UA resin - Double bonds conversion of UA resin and nanohybrid materials - XRD analysis of UA resin and nanohybrid materials - Thermal properties of UA resin and nanohybrid materials - Optical properties of UA resin and nanohybrid materials - Physical characterization of UA resin and nanohybrid materials - Chemical and solvent resistance of UA resin and nanohybrid materials - Morphologies of UA resin and nanohybrid materials
- Table 1 : Formulations of nanohybrid coatings materials
- Table 2 : Thermal properties of UA resin and nanohybrid materials
- Table 3 : Transmittance of UA resin and nanohybrid materials
- Table 4 : Physical characterization of UA resin and nanohybrid materials
- Table 5 : Chemical resistance of UA resin and nanohybrid materials
- Table 6 : Solvent resistance of UA resin and nanohybrid materialsDOI : https://doi.org/10.1007/s11998-023-00839-7 En ligne : https://drive.google.com/file/d/1_6e47gmTESBx1ckg4qXRI-gdNPTg3Iuw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40778
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 575-587[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Corrosion-resistant super-amphiphobic (PVDF-fnAl2O3) coating with thermal and mechanical stability / Nadiah Ghazali in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Corrosion-resistant super-amphiphobic (PVDF-fnAl2O3) coating with thermal and mechanical stability Type de document : texte imprimé Auteurs : Nadiah Ghazali, Auteur ; Wan Jefrey Basirun, Auteur ; Azmi Mohammed Nor, Auteur ; Mohd Rafie Johan, Auteur ; Fariza Abdul Rahman, Auteur Année de publication : 2024 Article en page(s) : p. 589-599 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumine
Amphiphobie
Anticorrosifs
Anticorrosion
Caractérisation
Fluoroalkylsilane
Hydrophobie
Mouillabilité
Polyfluorure de vinylidène
PyrolyseLa pyrolyse est la décomposition ou thermolyse d'un composé organique par la chaleur pour obtenir d'autres produits (gaz et matière) qu'il ne contenait pas. L'opération est réalisée en l'absence d'oxygène ou en atmosphère pauvre en oxygène pour éviter l'oxydation et la combustion (L’opération ne produit donc pas de flamme). Il s'agit du premier stade de transformation thermique après la déshydratation.
Elle permet généralement d'obtenir un solide carboné, une huile et un gaz. Elle débute à un niveau de température relativement bas (à partir de 200 °C) et se poursuit jusqu'à 1 000 °C environ. Selon la température, la proportion des trois composés résultants est différente.
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The thermal and mechanical stability of amphiphobic anti-corrosion coating is evaluated in this study. The coating was fabricated from functionalized nano Al2O3 and polyvinylidene fluoride (PVDF) and analyzed using FTIR, DSC, TGA, XRD, abrasion and cross-hatched adhesion test analyses. DSC and XRD revealed the presence of multiple crystalline phases of PVDF in the coating which eventually increased the crystallinity and melting temperature. The removal of the CFx chain from alkylsilane occurred at elevated temperatures, which decreased the repellent characteristic. Overall, the coating demonstrated good thermal stability until the temperature of 450°C with the ISO class 2 adhesion. Note de contenu : - EXPERIMENTAL METHODS : Materials - Experimental procedure - Characterization
- RESULTS AND DISCUSSION : Coating wettability - Corrosion rate - Chemical composition and phase evaluation - Thermal properties - Mechanical properties
- Table 1 : The PVDF and FAS characteristic bands and the corresponding PVDF crystalline phases
- Table 2 : The melting temperature (Tm), melting enthalpy (H) and the calculated degree of crystallinity (Xc) for the single and double heating cycles
- Table 3 : The cross-hatched test performed on three different points for PVDF base and coating sampleEn ligne : https://drive.google.com/file/d/144homJFiYz54fN8noyr-smA7iLTySSyf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40779
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 589-599[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Preparation of low viscosity and high flexibility epoxy acrylate and its application in UV-curable coatings / Yumei Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Preparation of low viscosity and high flexibility epoxy acrylate and its application in UV-curable coatings Type de document : texte imprimé Auteurs : Yumei Zhou, Auteur ; Jinqing Qu, Auteur Année de publication : 2024 Article en page(s) : p. 601-610 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère époxy acrylique
Copolymères -- Synthèse
Oligomères
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultraviolet
Souplesse (mécanique)
Thermodurcissables
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Epoxy acrylate (EA) is currently the most widely used UV-curable oligomer due to its short curing time, high coating hardness, excellent mechanical property, and thermal stability. To address the problems of high brittleness, poor flexibility, and high viscosity of EA, the UV-curable epoxy acrylate oligomer with low viscosity and high flexibility was prepared and applied to UV-curable coatings. The carboxyl terminated intermediate obtained by the reaction of anhydride and diol was used to modify EA to improve the flexibility of cured film, and the flexibility was adjusted through the length of the carbon chain of diols. The resin viscosity was reduced by partially replacing E51 with binary glycidyl ether. Compared with unmodified EA, the viscosity of the resin prepared in this study decreases from 29800 to 13920 mPa s (25°C), and the flexibility of the cured film increases from 12 to 1 mm. Compared with commercially available modified EA, the raw materials used in this study are low cost and easy to obtain with a reaction temperature below 130°C, using a simple synthesis process, and no organic solvents. Note de contenu : - EXPERIMENT : Raw materials - Synthesis of EA - Synthesis of MHEA - Preparation of UV-cured film - Characterization - Acid value (A v) - Viscosity (V s) - Fourier transform infrared spectroscopy (FTIR) - 1H nuclear magnetic resonance (1H NMR) - Gel permeation chromatography (GPC) - Gel rate of curing film (C gel) - Thermogravimetric analysis (TGA) - Tensile properties testing - Curing time testing - Coating film properties testing
- RESULTS AND DISCUSSION : Determination of reaction conditions - Determination of the type of diols - Determination of the type of acid anhydrides - Determination of BDDGE addition amount - Structural analysis of MHEA - Curing process of UV-curable coatings - Thermogravimetric analysis of the cured films - Tensile properties of the cured films - UV-curable coating properties
- Table 1 : Effect of kinds of diols on properties of the resin and cured film
- Table 2 : Effect of kinds of anhydrides on properties of the resin and cured film
- Table 3 : Effect of BDDGE addition on the properties of the resin and cured film
- Table 4 : GPC results of E51 and MHEA
- Table 5 : TG results of cured film prepared by EA and MHEA
- Table 6 : Tensile properties of the EA and MHEA cured films
- Table 7 : Comparison of cured film propertiesDOI : https://doi.org/10.1007/s11998-023-00842-y En ligne : https://drive.google.com/file/d/1PLtHKXgXPTsptg2OK9_saRrfjeXqQFns/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40780
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 601-610[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Flame retardancy of acrylic emulsion resin intumescent coatings added with alkaline lignin on plywood / Chih-Shen Chuang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Flame retardancy of acrylic emulsion resin intumescent coatings added with alkaline lignin on plywood Type de document : texte imprimé Auteurs : Chih-Shen Chuang, Auteur ; Po-Heng Lin, Auteur ; Cheng-Jung Lin, Auteur Année de publication : 2024 Article en page(s) : p. 611-622 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Contreplaqué
Formulation (Génie chimique)
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Intumescence (chimie)
LignineLa lignine est un des principaux composants du bois, avec la cellulose, l'hémicellulose et des matières extractibles. La lignine est présente principalement dans les plantes vasculaires et dans quelques algues. Ses principales fonctions sont d'apporter de la rigidité, une imperméabilité à l'eau et une grande résistance à la décomposition. Toutes les plantes vasculaires, ligneuses et herbacées, fabriquent de la lignine. Quantitativement, la teneur en lignine est de 3 à 5 % dans les feuilles, 5 à 20 % dans les tiges herbacées, 15 à 35 % dans les tiges ligneuses. Elle est moindre pour les plantes annuelles que pour les vivaces, elle est maximum chez les arbres. La lignine est principalement localisée entre les cellules (voir parois pectocellulosiques), mais on en trouve une quantité significative à l'intérieur même de celles-ci. Bien que la lignine soit un réseau tridimensionnel hydrophobe complexe, l'unité de base se résume essentiellement à une unité de phénylpropane. La lignine est le deuxième biopolymère renouvelable le plus abondant sur la Terre, après la cellulose, et, à elles deux, elles cumulent plus de 70 % de la biomasse totale. C'est pourquoi elle fait l'objet de recherches en vue de valorisations autres que ses utilisations actuelles en bois d'œuvre et en combustible.
Voie de biosynthèse : La lignine est une molécule dont le précurseur est la phénylalanine. Cet acide aminé va subir une cascade de réactions faisant intervenir une dizaine de familles d'enzymes différentes afin de former des monolignols. Ces enzymes sont : phénylalanine ammonia-lyase (PAL), cinnamate 4-hydroxylase (C4H), 4-coumarate:CoA ligase (4CL), hydroxycinnamoyl-CoA shikimate/quinate hydroxycinnamoyl transferase (HCT), p-coumarate 3-hydroxylase (C3H), caffeoyl-CoA o-methyltransferase (CCoAOMT), cinnamoyl-CoA reductase (CCR), ferrulate 5-hydroxylase (F5H), caffeic acid O-methyltransferase (COMT) et cinnamyl alcohol deshydrogenase (CAD). Dans un certain nombre de cas, des aldéhydes peuvent également être incorporés dans le polymère.
Polyacryliques
Résonance magnétique nucléaire
Revêtements en phase aqueuse -- Additifs
Revêtements organiques
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : This study investigated the flame retardancy of water-based intumescent coatings for plywood by conducting flame retardancy tests by using water-based acrylic resin mixed with various concentrations (1%, 3%, 5%, and 10%) of alkaline lignin. Intumescent coatings containing alkaline lignin demonstrated superior flame retardancy compared with those without additives. At a concentration of 5%, the alkaline lignin promoted the formation of an ideal char layer during combustion. The chemical structure and durability of the phosphorus-carbon structure in the intumescent coatings were investigated through Fourier transform infrared spectroscopy and solid-state nuclear magnetic resonance analysis (13C and 31P). The analysis results reveal that intumescent coatings containing 5% alkaline lignin were more effective in reducing flammability than those containing higher concentrations of alkaline lignin. Note de contenu : - EXPERIMENT : Sample preparation - Thermal property analysis of intumescent coatings - Cone calorimeter tests - Infrared spectroscopy
13C and 31P solid-state NMR spectroscopy
- RESULTS AND DISCUSSION : Analysis of flame retardancy of intumescent coatings containing alkaline lignin - TGA of intumescent coatings - FTIR analysis - 13C and 31P solid-state NMR analysis
- Table 1 : Different formulations of intumescent coatings in a solid weight ratio (w/w)En ligne : https://drive.google.com/file/d/1vJQwy970UvOb2AwLWjFl70P0-3qY9yER/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40781
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 611-622[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Relationships between crystallization behavior and application properties of chemically coupled PAI-PTFE coatings / Michaela Genan-Smolka in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Relationships between crystallization behavior and application properties of chemically coupled PAI-PTFE coatings Type de document : texte imprimé Auteurs : Michaela Genan-Smolka, Auteur ; Dieter Jehnichen, Auteur ; Mikhail Malanin, Auteur ; Thomas Schmidt, Auteur ; Anne Marschner, Auteur ; Antje Schneider, Auteur ; Michael Göbel, Auteur Année de publication : 2024 Article en page(s) : p. 623-654 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Alliages polymères
Caractérisation
Extrusion réactive
Laque et laquage
Métaux -- Revêtements protecteurs
Polyamide-imide
Polymères -- Propriétés thermiques
Polytétrafluoréthylène
Revêtements organiques
Structure cristalline (solide)Index. décimale : 667.9 Revêtements et enduits Résumé : Poly(tetrafluoroethylene) (PTFE) is well known for its very low friction coefficient and thus widely used for antifriction applications, e.g., sliding lacquers, for many years. Because of the high wear rate and cold flow of the original polymer, PTFE is usually added in higher amounts to other polymer matrices as a lubricant. However, the incompatibility of PTFE requires lots of efforts to perform a homogeneous breaking down of agglomerates and particle distribution as well as dispersion stabilization of the physical mixtures during application and curing. PTFE can be functionalized by high energy irradiation and subsequently compatibilized with a polymer matrix by reactive extrusion resulting in chemical bonding of both polymers via suitable reactive groups. In this manner, poly(amide imide) (PAI) was coupled to γ-radiation modified PTFE micro-powder prior to the dispersion procedure. This study deals with the thermal and crystallization behavior of the PTFE lubricant in chemical bonded (cb) PAI-PTFEcb compound thin layers in comparison with those of the plain radiation modified PTFE depending on the cooling rate by DSC, Flash-DSC and WAXS. A morphological characterization of the extrudate as well as the coating gives information about the fragmentation and distribution of the PTFE phase in the PAI matrix. Furthermore, mechanical and surface properties of sliding lacquer films were analyzed after application on steel substrates by varying dry film thickness and curing. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials and material treatment - Characterization methods
- RESULTS AND DISCUSSION : Investigation of chemical bonding and PAI-PTFEcb morphology - Thermal behavior of the composite original polymer components - Thermal behavior of PAI-PTFEcb by defined slow cooling rates - Crystallization behavior by fast cooling -
X-ray measurements - Dispersion and film characterizationDOI : https://doi.org/10.1007/s11998-023-00845-9 En ligne : https://drive.google.com/file/d/1556A0Wp7Gpk5ztoS15CeC5SjtCs6MiD4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40782
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 623-654[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Preparation and performance study of the self-embrittle composite coatings for radioactive decontamination of surface layer of various materials / Yutuo Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Preparation and performance study of the self-embrittle composite coatings for radioactive decontamination of surface layer of various materials Type de document : texte imprimé Auteurs : Yutuo Wang, Auteur ; Zhengquan Zhang, Auteur ; Mengqing Xiao, Auteur ; Changwen Chen, Auteur ; Yuanlin Zhou, Auteur ; Shanqiang Wang, Auteur Année de publication : 2024 Article en page(s) : p. 655-663 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages polymères
Copolymères -- Synthèse
Décontamination radioactive
Dioxyde de silicium
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : A composite coating with self-embrittlement was prepared using SiO2-modified 3-aminopropyltrimethoxysilane and a solution of random copolymer P(PMMA-co-PMAA-co-PTFEMA). The structures and properties of the composite emulsions were determined using Fourier transform infrared spectroscopy, thermogravimetry, X-ray diffractometry, and transmission electron microscopy. The results indicate that the self-embrittlement morphology of the coating can be controlled by adjusting the ratio of MMA/MAA in the random copolymer. Furthermore, the coating exhibits a good decontamination effect on simulated radioactive dust (doped with elemental K). Note de contenu : - EXPERIMENTAL : Materials - Synthesis of the random copolymer P(MMA-co-MAA-co-TFEMA) solution - Preparation of the nano-silica ethanol suspension - Preparation of the self-embrittle composite coating-modified SiO2/random - Characterization of chemical structures
- RESULTS AND DISCUSSION
- Table 1 : Self-embrittle composite coating tested for decontamination rates of glass panels, plastic wood panels, 321 stainless-steel sheets, and epoxy self-leveling floors against common chemical nuclide (K) contaminationDOI : https://doi.org/10.1007/s11998-023-00846-8 En ligne : https://drive.google.com/file/d/1l3JEfHoYDBIpgYu9B46XtrUjb5EEEJVo/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40783
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 655-663[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Towards the identification of the volatile organic compounds emitted by the coatings used in a car factory painting line / Pedro Catalao Moura in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Towards the identification of the volatile organic compounds emitted by the coatings used in a car factory painting line Type de document : texte imprimé Auteurs : Pedro Catalao Moura, Auteur ; Fausto Santos, Auteur ; Carlos Fujao, Auteur ; Valentina Vassilenko, Auteur Année de publication : 2024 Article en page(s) : p. 665-682 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Air intérieur -- Analyse
Air intérieur -- Pollution
Analyse spectrale
Automobiles -- Revêtements
Chromatographie en phase gazeuse
Couche de base
Enrobage (technologie)
Primaire (revêtement)
Revêtements -- Teneur en composés organiques volatils
Revêtements organiques
VernisIndex. décimale : 667.9 Revêtements et enduits Résumé : One of the main reasons for the degradation of working conditions is the lack of air quality. It is known that indoor air contaminants pose a risk to both the human organism and the environment, which constitutes a challenge for employers and major industries. A car factory painting line is an evident example of a work location in which the employers must be especially aware and concerned with the employees' health. Since the coatings are the main VOCs-emitting source, this work studied the analytes emitted by four primers, 17 basecoats and one varnish used in a car factory of a world-renowned automotive brand, with gas chromatography-ion mobility spectrometry (GC-IMS), as a way of identifying all the coating-borne VOCs that can be emitted to the indoor air. The variability of the collected data was assessed, and the repeatability of the results proved the suitability of GC-IMS for this type of study. Among primers, inks and varnish, 45 VOCs were accurately identified using an exclusively developed database of compounds. The presence of the identified analytes in the composition of the coatings represents the potentiality of being emitted to the indoor air of the factory and, consequently, denotes their eventual toxicity for the employees of the painting line. These results represent a step forward in the assessment of the panting line work conditions, so eventual consequences to the employees’ health are theoretically discussed; nonetheless, further studies aim to examine air samples of the factory and evaluate the work conditions and actual consequences to the employees that must be developed. Note de contenu : - INTRODUCTION : Volatile organic compounds - Car factory painting line - Gas chromatography-ion mobility spectrometry - Methodology - Analyzed samples - Sample preparation - Gas chromatography-ion mobility spectrometry - Identification of VOCs
- RESULTS AND DISCUSSION : SpectraDOI : https://doi.org/10.1007/s11998-023-00847-7 En ligne : https://drive.google.com/file/d/1HasPpx1OxFU8v_h1Z9UKqDaBz7L6DSvN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40784
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 665-682[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Preparation of hydrophilic modified ZIF-8 and its application in the preparation of nanocomposite matrix reverse osmosis membrane with improved permeation performance / Yuwen Lai in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Preparation of hydrophilic modified ZIF-8 and its application in the preparation of nanocomposite matrix reverse osmosis membrane with improved permeation performance Type de document : texte imprimé Auteurs : Yuwen Lai, Auteur ; Jin He, Auteur ; Li Yanchun, Auteur ; Shilin Zhou, Auteur ; Wentao Yan, Auteur ; Yong Zhou, Auteur ; Congjie Gao, Auteur Année de publication : 2024 Article en page(s) : p. 683-692 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Composés organométalliques
Hydrophilie
Matériaux hybrides
Membranes (technologie)
Osmose inverse
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Structure imidazolate zéolitiqueLes structures imidazolates zéolitiques (ZIF) sont une classe de structures métallo-organiques (MOF) qui sont topologiquement isomorphes avec les zéolites . Les verres ZIF peuvent être synthétisés par la méthode de fusion-trempe, et le premier verre ZIF trempé à l'état fondu a été fabriqué et rapporté pour la première fois par Bennett et al. en 2015. Les ZIF sont composés d' ions de métaux de transition coordonnés de manière tétraédrique (par exemple Fe , Co , Zn ) reliés par des lieurs imidazolates . Étant donné que l'angle métal-imidazole-métal est similaire à l'angle Si-O-Si de 145° dans les zéolites, les ZIF ont des topologies semblables à celles des zéolites. En 2010, 105 topologies ZIF ont été rapportées dans la littérature. En raison de leur porosité robuste, de leur résistance aux changements thermiques et de leur stabilité chimique, les ZIF sont étudiés pour des applications telles que la capture du dioxyde de carbone.
La structure d'une charpente d'imidazolate zéolitique est réalisée par assemblage tridimensionnel de tétraèdres métalliques (imidazolate).
Les verres ZIF sont un type de matériau récemment découvert qui suscite un intérêt croissant ces dernières années, avec environ 13 ZIF différents, dont ZIF-4, ZIF-62 et ZIF-76, préparés avec succès dans leur état vitreux. Dans la science des matériaux traditionnelle, les verres peuvent être divisés en trois grandes familles : inorganiques, organiques et métalliques. Les liaisons chimiques qui composent la structure des membres de chaque famille sont respectivement des liaisons mixtes ioniques/covalentes, des liaisons covalentes et des liaisons métalliques. Les verres ZIF, quant à eux, sont un verre coordonné organique-inorganique découvert récemment et ont une structure complètement différente de celle des trois familles de verres traditionnelles. Ils représentent ainsi un quatrième type de verre. (Wikipedia)
TaninsIndex. décimale : 667.9 Revêtements et enduits Résumé : Metal–organic frameworks (MOFs) are widely employed in designing nanocomposite membranes owing to their excellent performance and diversity. However, their inherent hydrophobicity limits their application in nanocomposite membranes. In order to improve the hydrophilicity of zeolitic imidazolate framework-8 (ZIF-8), tannic acid (TA) was utilized to etch-modify it, resulting in a TA-ZIF-8 nanostructure with a hydrophilic shell. TA-ZIF-8 was subsequently introduced into the aqueous phase and used to prepare a nanocomposite matrix reverse osmosis membrane through interfacial polymerization (IP). The prepared nanocomposite reverse osmosis membrane had a surface with good hydrophilicity and a pure water flux increased to 55.28 L m−2 h−1 (approximately 1.74 times). Additionally, the introduction of TA-ZIF-8 significantly enhanced the electronegativity of the membrane surface, and the nanoparticles were compatible with the polyamide layer, leading to a salt rejection rate of up to 99.5% for a NaCl solution with a concentration of 32000 ppm. These results indicate great potential for applying hydrophilically modified ZIF-8 to reverse osmosis membranes. Note de contenu : - EXPERIMENTAL : Materials and chemicals - Preparation of ZIF-8 and TA-ZIF-8 - Preparation of TFN RO membranes - Characterization - Evaluation of membrane performance
- RESULTS AND DISCUSSIONS : Characterization of ZIF-8 and TA-ZIF-8 - Characterization of TA-TFN RO membranes - The performances of TA-TFN RO membranes
- Table 1 : Surface elemental percentage of TFC, TFN, and TA-TFN-1 membranes obtained from XPS spectraDOI : https://doi.org/10.1007/s11998-023-00848-6 En ligne : https://drive.google.com/file/d/16Yu0DLDL4A_qPDwBBl_o4xpCE7OvAHPW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40785
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 683-692[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Fabrication of poly(vinylidene fluoride)/graphite heterogeneous porous carbon nanofiber composite mat by electrospraying method for efficient oil-water separation in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Fabrication of poly(vinylidene fluoride)/graphite heterogeneous porous carbon nanofiber composite mat by electrospraying method for efficient oil-water separation Type de document : texte imprimé Année de publication : 2024 Article en page(s) : p. 693-702 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Electrofilature
Fibres de carbone
Graphite
Matériaux poreux
Nanofibres
Polyfluorure de vinylidène
Pulvérisation électrostatique
Séparation huile/eauIndex. décimale : 667.9 Revêtements et enduits Résumé : The efficient separation of oil and water is significant in addressing oil–water pollution issues. In this study, we developed a poly(vinylidene fluoride)/graphite (PVDF/GE) multiscale heterogeneous porous carbon nanofiber composite mat (MHPCM) through a two-step electrospinning method for enhanced oil–water separation. The mat was prepared by incorporating PVDF nanospheres, GE flakes, and carbon nanofibers, taking advantage of their inherent oil-repellent and water-attracting properties. MHPCM-4 demonstrates superhydrophobicity (WCA≈154.1°) and superoleophilicity (OCA≈0°). The separation efficiency for 1–14 μm carbon tetrachloride-in-water emulsions exceeds 99.9%. After 25 cycles, MHPCM-4 maintains its oil flux at 92.25% of the initial value. Additionally, even after 25 cycles, MHPCM-4 retains a separation efficiency of 99.8% for immiscible oil-in-water mixtures and a separation efficiency of 99.7% for water-in-oil emulsions. Thus, this material has great potential for efficient oil–water separation in various circumstances. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of MHPCM - Characterization
- RESULTS AND DISCUSSION : Microscopic morphology analysis - Wettability performance - Oil-water separation performance - Surface chemical properties - Surface roughness and antifouling performance - Mechanism analysis of oil/water separationDOI : https://doi.org/10.1007/s11998-023-0000851-x En ligne : https://drive.google.com/file/d/1vtal7HhHiBU534Cj73aWj3t6ySfoFsm8/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40786
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 693-702[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Hydrophobic phytic acid conversion layers for corrosion protection of steel surfaces / Michelle Weinert in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Hydrophobic phytic acid conversion layers for corrosion protection of steel surfaces Type de document : texte imprimé Auteurs : Michelle Weinert, Auteur ; Jochen S. Gutmann, Auteur ; Michael Dornbusch, Auteur Année de publication : 2024 Article en page(s) : p. 703-736 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Anticorrosifs
Anticorrosion
Caractérisation
Esterification
Métaux -- Revêtements protecteurs
Phytique, Acide
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Revêtement de conversion
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The possibility for a good conversion protection based on phytic acid (PA) solutions is described many times in the literature.1,2 The latest results show that PA cannot improve the corrosion protective properties with an organic coating,2 although PA conversion layers without organic coatings have already successfully been applied on different surfaces and the development of layers with enhanced corrosion protective behavior was possible.3,4 The reason why PA does not work together with an organic coating is based on the hydrophilic surface and therefore the low contact angle of the PA conversion layer.2 One solution is to modify PA directly and/or change the solution properties to increase the hydrophobic properties. In this work, a new and innovative way to synthesize a new type of sustainable organic PA-based conversion layers on steel, which works completely without titanium or zirconium and is a new approach for hydrophobic conversion layers, is presented.5 The results prove the formation of a pure PA-based conversion layer on the surface. The infrared (IR), Raman, and nuclear magnetic resonance (NMR) spectroscopy verified the new synthesis products and by means of the vibration spectroscopy, the resulting conversion layers. To analyze the new physical properties, the contact angle of the conversion layers was detected. By means of the electrochemical impedance spectroscopy (EIS), the electrochemical stability of the conversion was studied and with cyclic voltammetry (CV), the solidity ratio was investigated. At last, the corrosion protective performance of the layers in combination with an E-coat in the salt spray test (SST) was examined. All modified PA-based conversion layers in combination with E-coats increased the corrosion protective properties in relation to industrial used phosphate conversion layers of steel surfaces. The overall result is a new kind of hydrophobic phytic acid-based conversion layer which shows advanced anticorrosion and coatability properties compared to other layers based on PA. The results if the EIS measurements show that the resistance of the coating significantly increased, and diffusion could be suppressed by coating the metal surface with PA conversion layers. The comparison of the SST results for the reference and the modified PA underline these observations. The overall SST rating increased by 2 and the delamination went down to 1.9 mm while the corrosion was 0.1, comparable to phosphated steel. Note de contenu : - CHARACTERIZATION AND MATERIALS : Characterization - Materials and modified PA structures
- EXPERIMENTAL METHODS : Synthesis - Formation of a conversion layer
- CONVERSION LAYERS WITH CATHODIC DIP COATING : Two-layer system
- RESULTS AND DISCUSSION : Characterization of the conversion layerDOI : https://doi.org/10.1007/s11998-023-00852-w En ligne : https://drive.google.com/file/d/1YNEaZvyqrncDo6RPuyTAXXJ2cSNOz7MK/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40787
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 703-736[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Increased hydrophilicity and anti-fouling effect of orthokeratology lenses coated with NVP and PEGMA by plasma-enhanced chemical vapor deposition / Tsung-Jen Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Increased hydrophilicity and anti-fouling effect of orthokeratology lenses coated with NVP and PEGMA by plasma-enhanced chemical vapor deposition Type de document : texte imprimé Auteurs : Tsung-Jen Wang, Auteur ; Wen-Pin Lin, Auteur ; Siao-Pei Guo, Auteur Année de publication : 2024 Article en page(s) : p. 737-745 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dépôt chimique en phase vapeur
Hydrophilie
Lentilles (optique)
Matériaux -- Propriétés antisalissures
Polyéthylène greffé anhydride maléique
Revêtements organiques
Technique des plasmasIndex. décimale : 667.9 Revêtements et enduits Résumé : Plasma-enhanced chemical vapor deposition (PECVD) is a vacuum plasma treatment procedure for the deposition of thin film on a substance, which was first used on orthokeratology lenses (ortho-k lenses) in order to coat polymerized 1-vinyl-2-pyrrolidinone (NVP) and poly(ethylene glycol) methacrylate (PEGMA) on the lenses. First, the surface of ortho-k lenses was pretreated with electrons, radicals, and peroxides for 9 min, under 9 sccm Ar, 36 sccm O2, and 120 W of applied radio frequency (RF) power. NVP and PEGMA were deposited on the surface of lenses through the heating of NVP to 50°C and PEGMA to 43°C. The chamber pressure was maintained at 300 mTorr, with 40 W of applied RF power, 12 sccm Ar, and an 8-cm treatment distance. Obviously decreased water contact angle of NVP/PEGMA-coated lenses exhibited excellent hydrophilicity, which lasted for up to 90 days, and significant lower protein adsorption was observed on NVP/PEGMA-coated lenses. Besides, the MTT assay revealed the great biocompatibility of the coated lenses. Therefore, our results showed that PECVD can be used to prepare NVP/PEGMA-coated ortho-k lenses with excellent long-lasting hydrophilicity and anti-fouling effect. Note de contenu : - MATERIALS AND METHODS : Materials - Self-conducted chamber for PECDV treatment - Hydrophilicity of NVP/PEGMA-coated lenses - Surface characteristics - Light transmittance - Protein adsorption and antibacterial properties - Cytotoxicity
- RESULTS AND DISCUSSION : Hydrophilicity and stability of NVP/PEGMA-coated ortho-k lenses - Surface characteristics - Light transmittance - Protein adsorption and antibacterial properties - CytotoxicityDOI : https://doi.org/10.1007/s11998-023-0000853-9 En ligne : https://drive.google.com/file/d/1oVTQXJPoPX4TVmtPceINDPe4DMIemTx_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40788
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 737-745[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Development of a polydimethylsiloxane-Eucalyptus essential oil antibacterial coating / Slah Hidouri in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Development of a polydimethylsiloxane-Eucalyptus essential oil antibacterial coating Type de document : texte imprimé Auteurs : Slah Hidouri, Auteur ; Reza Jafari, Auteur ; Gelareh Momen, Auteur Année de publication : 2024 Article en page(s) : p. 747-760 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Biofilms
Caractérisation
Eucalyptus et constituants
Huiles essentielles
Hydrophobie
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : This study presents a novel antibacterial surface comprised of Eucalyptus essential oil trapped within the micro-nanostructures of a polydimethylsiloxane (PDMS) substrate. A wettability study showed that the replication of the micro-nanostructure on PDMS led to a superhydrophobic behavior of the surface. The SEM images revealed that the micro-nanostructure increased the contact angle of the PDMS surfaces. Fourier transform infrared spectroscopy analysis led to the conclusion that the essential oil was entrapped in the PDMS, thereby promoting its antibacterial activity. Multiple tests demonstrate the antibacterial ability of these superhydrophobic surfaces in preventing the establishment of Escherichia coli and Bacillus cereus bacterial colonies and biofilms. These surfaces reduce contamination by 99.98% when exposed to a bacteria-rich water droplet. Our observations highlight the role of Eucalyptus essential oil in limiting initial bacterial growth and biofilm formation on exposed surfaces. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of the surfaces - Physicochemical characterization of the surfaces
- RESULTS AND DISCUSSION : Surface wettability - FTIR analysis of the surfaces - SEM micrographs - Antibacterial activityDOI : https://doi.org/10.1007/s11998-023-00854-8 En ligne : https://drive.google.com/file/d/1y2MxY-N8kex2zMuXcmIxHbwMe5xL61Q_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40790
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 747-760[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Improved corrosion protection performance of electrophoretic epoxy coatings with the incorporation of amino-functionalized graphene oxide / Rui Gou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Improved corrosion protection performance of electrophoretic epoxy coatings with the incorporation of amino-functionalized graphene oxide Type de document : texte imprimé Auteurs : Rui Gou, Auteur ; Shihong Zhang, Auteur ; Yi He, Auteur ; Changhua Li, Auteur ; Hongjie Li, Auteur ; Dan Sun, Auteur ; Guiyang Wu, Auteur ; Xi Yuan, Auteur ; Wen Chen, Auteur ; Jing Yan, Auteur Année de publication : 2024 Article en page(s) : p. 761-771 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Anticorrosifs
Anticorrosion
Caractérisation
Composés organiques -- Synthèse
Dépôt électrolytique
Epoxydes
Greffage (chimie)
Métaux -- Revêtements protecteurs
Oxyde de graphène
Polyéther imide
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, polyethyleneimine (PEI) was grafted on the surface of graphene oxide (GO) to prepare PEI-GO material. The PEI-GO/EP composite coating was successfully deposited on carbon steel through the cathodic electrophoretic deposition (C-EPD) process. The zeta potential, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), atomic force microscopy (AFM), and thermogravimetric analysis (TGA) methods were used to characterize the GO and PEI-GO materials. The dispersibility of PEI-GO in epoxy electrophoretic paint was studied by TEM and the fracture surface morphology of the coatings was observed by scanning electron microscope (SEM). Electrochemical impedance spectroscopy (EIS) studies evaluated the corrosion resistance of composite coatings. In summary, the impedance modulus of PEI-GO/EP composite coating is two orders of magnitude higher than that of neat epoxy coating, with enhanced anticorrosion performance. Note de contenu : - EXPERIMENT : Materials - Synthesis of PEI-GO - Preparation of epoxy coating by an electrophoresis process - Characterization
- RESULTS AND DISCUSSION : Materials characterizations - Morphologies of coatings - Anticorrosion properties - Corrosion protection mechanismDOI : https://doi.org/10.1007/s11998-023-00855-7 En ligne : https://drive.google.com/file/d/1FvJj3DJct_v6BofFTE5UuwDCTIQuRWxF/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40791
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 761-771[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Development of antibacterial waterborne polymeric coating using iodine complex / Hariharan Sekar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Development of antibacterial waterborne polymeric coating using iodine complex Type de document : texte imprimé Auteurs : Hariharan Sekar, Auteur ; Mahesh S. Tirumkudulu, Auteur ; Venkat Gundabala, Auteur Année de publication : 2024 Article en page(s) : p. 773-787 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
Biofilms
Biomasse
Caractérisation
Copolymère méthacrylate de méthyle, acrylate de butyle
Hydrophobie
Iode
Latex
Revêtements en phase aqueuse
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : With advancements in architectural coatings, the demand for antimicrobial coatings in this sector has increased significantly. The COVID-19 pandemic has also been a primary force behind the increased demand for and production of antimicrobial coatings. Typically, antimicrobial coatings are used to resist and decolonize microbial attacks such as biofilm formation, fungal contamination, and black mold formation. In this study, we synthesized a water-based antimicrobial polymer nanocomposite, I-P(MMA/BA), by blending an iodine complex with a poly (methyl methacrylate-butyl acrylate) latex with the aid of polyol and polyvinylpyrrolidone. Antimicrobial efficacy was evaluated in two habitats, namely planktonic and biofilm. Biomass studies indicated that iodinated latex nanocomposites and films show excellent antibacterial and antibiofilm activities. About 85–97% of biofilm formation was reduced by covering 15–30% of the area with iodinated latex film. The contact angle measurement of the iodinated latex-coated surface provides evidence of good hydrophobicity, which prevents stagnation of water over the surface. The developed dual-functional water-based iodinated nanocomposite displays great potential for inhibiting biofilm formation on surfaces when employed as a binder in paints. Note de contenu : - EXPERIMENTAL : Materials - Formulation of iodinated latex composite - Fabrication of iodinated latex film - Inoculum preparation - Antibacterial efficacy tests for iodinated latex film - Antibiofilm efficacy tests for iodinated latex film - Effect of water treatment on antibacterial and antibiofilm activities of iodinated film - Physical characterization of iodinated latex film
- RESULTS AND DISCUSSION : Composition of iodinated latex composite - Antibacterial activity of iodinated latex dispersion and film - Antibiofilm activity of iodinated latex film - Antibacterial and antibiofilm activity of iodinated film upon exposure to water - Color analysis of iodinated latex film - Hydrophobicity of iodinated latex film - Water absorption studies of iodinated latex filmDOI : https://doi.org/10.1007/s11998-023-00856-6 En ligne : https://drive.google.com/file/d/1dqDG_iwRNMS6vbxRQXHTMZHpNKCHwJj-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40792
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 773-787[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Droplet shedding on hydrophilic and superhydrophobic surfaces under the effect of air shear flow / Tao Shi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Droplet shedding on hydrophilic and superhydrophobic surfaces under the effect of air shear flow Type de document : texte imprimé Auteurs : Tao Shi, Auteur ; Hanming Yang, Auteur ; Huaqiao Peng, Auteur ; Zuxi Xia, Auteur Année de publication : 2024 Article en page(s) : p. 789-798 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages
Chlorhydrique, Acide
Gouttelettes
Hydrophilie
Hydrophobie
Mouillabilité
Peroxyde d'hydrogèneLe peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales.
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.
Revêtements organiques
Surfaces (technologie)
Taille des gouttelettesIndex. décimale : 667.9 Revêtements et enduits Résumé : This study aims to investigate and compare the behavior of droplets of different volumes on hydrophilic and superhydrophobic surfaces (SHSs) under the effect of air shear flow. The results reveal that the effect of droplet volume on wetting length in the case of a hydrophilic surface is different from that in the case of SHS. On hydrophilic surfaces, droplets with larger volumes exhibit greater wetting length and adhesion, whereas on SHSs, these parameters are similar regardless of droplet volume. Additionally, airflow velocity is one of the critical factors for shear-driven droplet behavior on SHS. At an airspeed of 5 m/s, droplets slide on the SHS; however, they roll on the surface at an airspeed of 15 m/s. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Samples preparation - Wettability measurements - Droplet shedding experimental setup
- RESULTS AND DISCUSSION : Wettability and water adhesion on the Al and Al-PDMS surfaces - Change in wetting length and dynamic contact angle with droplet movement on the Al surface - Change in wetting length and dynamic contact angle with droplet movement on the Al-PDMS surface
- Table 1 : Wettability of the samplesDOI : https://doi.org/10.1007/s11998-023-00861-9 En ligne : https://drive.google.com/file/d/10aEOHuMVYDfnmazbZgLIvfL_xuHpAuVr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40793
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 789-798[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible