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JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH . Vol. 21, N° 3Mention de date : 05/2024Paru le : 20/06/2024 |
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Ajouter le résultat dans votre panierAntimicrobial surface coating as a pathway to curb resistance : preparation, mode of action and future perspective / Vincent Ngunjiri Mwangi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Antimicrobial surface coating as a pathway to curb resistance : preparation, mode of action and future perspective Type de document : texte imprimé Auteurs : Vincent Ngunjiri Mwangi, Auteur ; Edwin Shigwenya Madivoli, Auteur ; Mourine Kangogo, Auteur ; Sammy Indire Wanakai, Auteur ; Walyambillah Waudo, Auteur ; Dennis Mwanza Nzilu, Auteur Année de publication : 2024 Article en page(s) : p. 799-810 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumine
Antimicrobiens
Argent
Chaux
Inhibition microbienne
Nanoparticules
Oxyde de cérium
Oxyde de cuivre
Oxyde de magnésiumL'oxyde de magnésium, communément appelé magnésie, a pour formule MgO et se présente sous la forme de poudre blanche très fortement basique absorbant l'eau et le dioxyde de carbone présents dans l'atmosphère.
STRUCTURE : L'oxyde de magnésium est un cristal ionique. L'oxyde de magnésium a une structure comparable à celle du chlorure de sodium7. Cela se traduit par
Un réseau d'anion oxygène formant une structure de type cubique à faces centrées
Un réseau de cation magnésium occupant l'ensemble des sites octaèdriques.
L'oxyde de magnésium est un matériau modèle des cristaux ioniques car la faible électronégativité du magnésium, et la forte électronégativité de l’oxygène font que la structure de l’oxyde de magnésium peut s’expliquer quasi uniquement grâce à des interactions entre des particules ponctuelles chargées 10.
La surface de l'oxyde de magnésium la plus stable dans le vide est obtenue en réalisant une coupe selon le plan cristallographique (100). Les particules d'oxyde de magnésium produites par combustion du magnésium métallique présentent d'ailleurs une forme cubique révélatrice de la présence de ces plans. Néanmoins, en présence d'eau, la surface de l'oxyde de magnésium est couverte d'ions hydroxyles qui stabilisent les plans (111)
PRODUCTION : La majeure partie de l'oxyde de magnésium est actuellement obtenue soit à partir de carbonate de magnésium MgCO3 qui constitue certains minéraux tels que la magnésite, soit à partir de chlorure de magnésium que l'on extrait de l'eau de mer ou de saumures souterraines.
Oxyde de titane
Oxyde de zinc
Oxydes métalliques
Résistances aux antibiotiques
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Antimicrobial resistance has proven to be an existential threat that endangers the health of human beings. The ease of accessing conventional antibiotics, and their unlimited and unregulated use and often misuse is seen to be a contributing factor to the rise in the resistance of microbes toward medications. The overuse of these medications in the agricultural sector also adds to the rising burden of antibiotic resistance. In line with efforts to counter the threat of antimicrobial resistance and the menace of hospital acquired infections developing antimicrobial surface coatings that can eliminate microbes that get deposited on those coatings is essential. This review aims to bring an understanding of antimicrobial resistance mechanisms, the preparation and mode of action and the future perspective of the antimicrobial surface coatings. Note de contenu : - ANTIBIOTIC RESISTANCE MECHANISMS
- NANOPARTICLES AS ANTIMICROBIAL SURFACE COATINGS : Silver nanoparticles - Titanium oxide nanoparticles - Zinc oxide nanoparticles - Copper oxide nanoparticles - Magnesium oxide nanoparticles - Calcium oxide nanoparticles - Cerium oxide nanoparticles - Aluminum oxide nanoparticles - Bimetallic oxide nanoparticles
- Table 1 Antimicrobial metal nanoparticles, microorganisms they inhibit and zones of inhibitionDOI : https://doi.org/10.1007/s11998-023-00879-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00879-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41060
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Advances in anti-corrosion coatings on magnesium alloys and their preparation methods / Jing Tan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Advances in anti-corrosion coatings on magnesium alloys and their preparation methods Type de document : texte imprimé Auteurs : Jing Tan, Auteur ; Lizi Liu, Auteur ; Hui Wang, Auteur ; Jinjie Luo, Auteur Année de publication : 2024 Article en page(s) : p. 811-825 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Dépôt électrophorétique
Electrophorèse
Magnésium -- Alliages
Magnétron
Métaux -- Revêtements protecteurs
Polymères
Revêtement métallique
Revêtements inorganiques
Revêtements organiques
Système de pulvérisation (technologie)
Technique des plasmas
Traitement hydrothermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Anti-corrosion coatings on magnesium alloys serve as a barrier that inhibits external agents such as salt and acid rain from interacting with the alloy surface. By isolating the alloy from air and moisture, these coatings delay the onset of oxidation and corrosion, thereby enhancing the alloy’s durability. Consequently, the formulation of such coatings is a critical step in advancing the magnesium alloy industry. This review outlines the types and anti-corrosive mechanisms of coatings for magnesium alloys, namely, organic, inorganic, metallic, and composite coatings. Additionally, various methods for coating preparation are discussed, including hydrothermal methods, chemical vapor deposition, electrodeposition, microarc oxidation, and magnetron sputtering. Finally, the review offers directions and conceptual frameworks for future research on magnesium alloy anti-corrosion coatings. Note de contenu : - TYPE AND ANTI-CORROSION MECHANISM OF MAGNESIUM ALLOY COATINGS : Inorganic coating - Organic coating - Metal coating - Composite coating
- PREPARATION METHOD OF MAGNESIUM ALLOY COATING : Hydrothermal method - Chemical vapor deposition method - Electrophoretic deposition method - Plasma electrolytic oxidation method - Magnetron sputtering technology - Spraying method - Other methods
- Table 1 : Preparation and application of anti-corrosion coatings on some magnesium alloysDOI : https://doi.org/10.1007/s11998-023-00887-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00887-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41061
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Advances in emerging hydrogel fouling-release coatings for marine applications / Michael Kio in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Advances in emerging hydrogel fouling-release coatings for marine applications Type de document : texte imprimé Auteurs : Michael Kio, Auteur ; Jeffery Klauda, Auteur Année de publication : 2024 Article en page(s) : p. 827-856 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Coques (architecture navale)
Enrobage (technologie)
Essais (technologie)
hydrocolloïdes
hydrocolloïdes -- Synthèse
Hydrophilie
Hydrophobie
Polymères
Revêtements antisalissures:Peinture antisalissures
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The accumulation of microorganisms, algae, mussels, and barnacles on the hull of sea vessels leads to biofouling, surface corrosion, and increased drag as the vessel moves through water costing the marine industry around $15 billion/year. Current commercial traditional antifouling coatings suffer from reduced energy efficiency and short lifespan and contain heavy metals that are toxic to marine organisms and humans. The banning of these coatings is due to environmental concerns, and nonbiocidal alternatives such as polymer-based coatings are being sought after. This review demonstrates emerging promises of hydrogel fouling-release coatings (FRCs) in the marine environment that may be effective against a prevalent amount of biofouling agents. The review also highlights the importance of polymer backbone materials with surface wettability characteristics possessing hydrophobic, hydrophilic, and zwitterionic properties and further discusses emerging antifouling techniques, synthesis of hydrogel, swelling behavior of hydrogel, laboratory assays of hydrogel coating, marine field test, and outlook of hydrogel fouling-release (FRCs) coatings. Note de contenu : - INFLUENCE OF COATING PROPERTIES ON FOULING RELEASE : Physiochemical interactions - Mechanical interactions
- HYDROGELS : Synthesis of hydrogel - Mechanical properties of hydrogel - Swelling behavior of hydrogel - Elasticity of hydrogel - Hydrogel polymer brushes - Antifouling activities of hydrogel - Antifouling marine field testDOI : https://doi.org/10.1007/s11998-023-00895-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00895-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41062
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Damage morphology and force-deflection curves for impact loading of thick multilayer organic protective coating systems / A. W. Momber in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Damage morphology and force-deflection curves for impact loading of thick multilayer organic protective coating systems Type de document : texte imprimé Auteurs : A. W. Momber, Auteur ; M. Irmer, Auteur ; D. Kelm, Auteur ; V. Cherewko, Auteur Année de publication : 2024 Article en page(s) : p. 857-878 Note générale : Errata. Author correction p. 1171 - Bibliogr. Langues : Américain (ame) Catégories : Analyse de dommages (matériaux)
Analyse morphologique
Endommagement (mécanique)
Essais de résilience
Essais dynamiques
Impact (mécanique)
Revêtements -- Fissuration
Revêtements multicouches
Revêtements organiques
Structures offshoreIndex. décimale : 667.9 Revêtements et enduits Résumé : The response of organic coatings to mechanical impact is crucial to their corrosion protection performance, particularly under offshore conditions. The paper categorizes and discusses four different types of response during the high-energy (3 to 20 J) impact of a falling ball-shaped weight on 14 multilayer organic offshore coating systems. The response types include plastic deformation, brittle (compressive) crushing, radial crack formation, and lateral delamination. Threshold and transition conditions are analyzed based on contact mechanics relationships. For the first time, complete force-deflection curves for this type of coating are recorded with an instrumented impact tester. The curves feature four characteristic points, namely a first local force maximum (FFS), the respective deflection at this force level (δFS), a maximum force (Fmax), and the respective deflection at this maximum force (δmax). These characteristic parameters are discussed in terms of coating system composition. Empirical equations for these parameters as well as for the damage size are derived. The results offer opportunities to quantitatively rank organic coatings with respect to their impact resistance. Note de contenu : - MATERIALS AND EXPERIMENTAL SETUP : Investigated coating systems - Impact testing device
- RESULTS AND DISCUSSION : Damage patterns - Force-deflection diagrams - Damage size
- Appendix : Damage morphologies and force-deflection curvesDOI : https://doi.org/10.1007/s11998-023-00829-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00829-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41063
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Preparation and performances of cationic waterborne polyurethane coating co-modified with acrylic and amino acid / Guankun Kuang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Preparation and performances of cationic waterborne polyurethane coating co-modified with acrylic and amino acid Type de document : texte imprimé Auteurs : Guankun Kuang, Auteur ; Yan Liu, Auteur ; Ying Qin, Auteur ; Tianhao Lu, Auteur ; Binjie Xin, Auteur Année de publication : 2024 Article en page(s) : p. 879-892 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acides aminés Les acides aminés (ou aminoacides) sont une classe de composés chimiques possédant deux groupes fonctionnels : à la fois un groupe carboxyle –COOH et un groupe amine –NH2. Parmi ceux-ci, les acides α-aminés se définissent par le fait que leur groupe amine est lié à l'atome de carbone adjacent au groupe acide carboxylique (le carbone α), ce qui leur confère la structure générique H2N–CHR–COOH, où R représente la chaîne latérale, qui identifie l'acide α-aminé.
Les acides α-aminés jouent un rôle fondamental en biochimie comme constituants élémentaires des protéines : ils polymérisent en formant des liaisons peptidiques qui aboutissent à de longues chaînes macromoléculaires appelées peptides.
Polyacryliques
Polymères cationiques
Polymères en émulsion
Polyuréthanes
Revêtements -- Propriétés mécaniques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Acrylic acid is commonly used to modify anionic waterborne polyurethanes, and little research has been done on the modification of cationic waterborne polyurethanes. In this study, the effect of acrylic acid addition at different levels on the performance of cationic waterborne polyurethanes was investigated. The experimental results showed that the stability, and chemical resistance of cationic waterborne polyurethane coatings were improved with the addition of acrylic acid, which has the advantages of better chemical resistance, high stability and low price, and the hardness of the coating gradually increased and the adhesion decreased with the increase of acrylic acid content, therefore, the acrylic acid content of 21% was the most suitable. In addition, the effect of amino acids as neutralizing agents on the performance of cationic waterborne polyurethane coatings was also explored. The addition of amino acids helped the cationic waterborne polyurethane to form a reticular crosslinked structure, and the experimental results showed that the mechanical properties of the cationic waterborne polyurethane coatings were greatly improved. Compared with the commonly used acids (hydrochloric acid and acetic acid), amino acids have the advantage of being environmentally friendly and non-toxic, which is more conducive to the industrial production and application of cationic waterborne polyurethane coatings. Note de contenu : - PREPARATION : Materials - Synthesis of CWPUA emulsion - Preparation of membrane - Preparation of tinplate coating - Characterization of the dispersibility of CWPUA emulsions - Structural and morphological characterization of CWPUA coatings - Characterization of water resistance properties of CWPUA coatings - Thermal stability characterization of CWPUA coatings - Characterization of mechanical properties of CWPUA coatings - Characterization of chemical resistance of CWPUA coatings - Other performance tests of CWPUA coatings
- RESULTS AND DISCUSSION : Dispersibility of CWPUA emulsions - FTIR spectra of CWPUA film - Water resistance of CWPUA coatings - Thermal properties of CWPUA coatings - Mechanical performance of CWPUA coatings - Microscopic morphology of CWPUA coatings -
Performance of CWPUA coatings - Chemical resistance of CWPUA coatingsDOI : https://doi.org/10.1007/s11998-023-00857-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00857-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41064
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Improved corrosion resistance and hydrophobic stability of sol-gel coatings by benzoxazine modification on aluminum alloys AA1060 / Zhou Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Improved corrosion resistance and hydrophobic stability of sol-gel coatings by benzoxazine modification on aluminum alloys AA1060 Type de document : texte imprimé Auteurs : Zhou Zhou, Auteur ; Juan Liu, Auteur ; Xin Meng, Auteur ; Changlu Zhou, Auteur Année de publication : 2024 Article en page(s) : p. 893-905 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages
Anticorrosifs
Anticorrosion
Benzoxazine
Caractérisation
Hydrophobie
Métaux -- Revêtements protecteurs
Revêtements organiques
Silanes
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of sol-gel coatings based on tetraethoxysilane (TEOS) was adopted in order to provide corrosion protection for aluminum alloys AA1060, which were modified by incorporating various ratios of silane-functionalized benzoxazine (Bz), labeled as Bz-based sol–gel coatings. Fourier transform infrared spectra were utilized to characterize the crosslinking network of Bz-based sol–gel coatings through calculating the conversion of Bz structure after the curing process, which was also further confirmed by the gel content test. Both hydrophobicity and corrosion resistance of Bz-based sol–gel coatings were fully investigated with the assistance of water contact angle (WCA) measurements, electrochemical impedance spectroscopy (EIS), and salt spray test. Bz incorporation could improve hydrophobic stability and corrosion resistance of Bz-based sol–gel coatings with increasing the Bz content during the 30-day immersion in a 3.5 wt% NaCl aqueous solution. Better performance of Bz-based sol–gel coatings than that of a control TEOS coating with a WCA above 93° and a charge-transfer resistance over 100 kΩ cm2 after 30-day EIS measurement shows their effective protective property for aluminum alloys. Note de contenu : - EXPERIMENTAL : Chemicals - Synthesis of Bz monomer - Surface treatment of aluminum alloys - Preparation of Bz-based sol-gel coatings - Characterization
- RESULTS AND DISCUSSION : Crosslinking structures of Bz-based sol-gel coatings - Hydrophobicity of Bz-based sol-gel coatings - Corrosion resistance behaviors of Bz-based sol-gel coatingsDOI : https://doi.org/10.1007/s11998-023-00858-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00858-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41065
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Preparation of high-solid, low-viscosity waterborne polyurethane: based on multiparticle size composite emulsification / Kunpeng Lou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Preparation of high-solid, low-viscosity waterborne polyurethane: based on multiparticle size composite emulsification Type de document : texte imprimé Auteurs : Kunpeng Lou, Auteur ; Siliang Li, Auteur ; Yang Cao, Auteur ; Menghang Li, Auteur ; Xiaoxuan Zou, Auteur ; Bo Jing, Auteur Année de publication : 2024 Article en page(s) : p. 907-923 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Emulsification
Granulométrie
Haut extrait sec
Polymères en émulsion
Polyuréthanes
Revêtements en phase aqueuse
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : In this paper, waterborne polyurethane (WPU-SL) with high solid content and low viscosity was successfully prepared by compounding large particle size emulsion (WPU-L) with a variety of small particle size emulsions (WPU-S) by investigating the effects of small particle size type, particle size ratio, and volume ratio on the emulsion properties. A series of characterization techniques of the waterborne polyurethane was carried out by FTIR, DSC, contact angle, viscometer, particle size meter, and universal testing machine. The results show that the WPU-L/WPU-S = 5/1 emulsion has a high solid content, good emulsion stability, and excellent coating film properties. When WPU-S1 and WPU-S3, two small particle size emulsions with a particle size ratio of 2.45 and 3.79, were emulsified with WPU-L, the solid content was up to 61.23%, the viscosity was only 342 mPa s, the tensile strength reached 20.97 MPa, and the adhesion grade was 5B, which was the most excellent overall performance, showing satisfactory results. Note de contenu : - EXPERIMENTAL : Materials - Preparation of small-particle waterborne polyurethane (WPU-S) - Preparation of large-particle waterborne polyurethane (WPU-L) - Preparation of high-solid content waterborne polyurethane (WPU-SL) - Preparation of WPU films
- CHARACTERIZATION
- RESULTS AND DISCUSSION : FTIR spectra of WPU - Emulsion properties of small particle size emulsions (WPU-S) and large particle size emulsions (WPU-L) - The particle size of WPU-SL emulsions and their solid content and viscosity - Thermal properties of WPU-SL emulsions - Water absorption of WPU-SL emulsions and their contact angle - Tensile properties of WPU-SL emulsions - Adhesion of WPU-SL emulsionsDOI : https://doi.org/10.1007/s11998-023-00859-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00859-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41066
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Surface properties of oriental beech wood coated with vegetable oil-based epoxide-amin nanocomposite materials after weathering / Yahya Kabasakal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
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Titre : Surface properties of oriental beech wood coated with vegetable oil-based epoxide-amin nanocomposite materials after weathering Type de document : texte imprimé Auteurs : Yahya Kabasakal, Auteur ; Ilknur Babahan-Bircan, Auteur ; Ergun Baysal, Auteur ; Caglar Altay, Auteur ; Hilmi Toker, Auteur Année de publication : 2024 Article en page(s) : p. 925-938 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique)
Composites
Corrosion par érosion
Couleur
Enrobage (technologie)
Epoxy amine
Hêtre
Nanoparticules
Nanotubes
Revêtements organiques
Rugosité
Surfaces (Physique)Index. décimale : 667.9 Revêtements et enduits Résumé : This work examined the changes in surface characteristics of Oriental beech (Fagus orientalis L.) covered with vegetable oil-based epoxide-amine (ETO + D230) and its nanocomposite derivatives Epoxy + amine + carbon nanotube (ETO + D230 + C), Epoxy + amine + fullerene (ETO + D230 + F), and Epoxy + amine + graphene (ETO + D230 + G) doped with carbon nanoparticles following weathering. Results showed that while all coated groups displayed good lightness stability following weathering, the non-coated (control) group produced negative lightness stability values. The coated Oriental beech had greater overall color stability than the uncoated (control) group. The specimens coated with ETO + D230 + C nanocomposite exhibited the best color stability. All uncoated and coated specimens produced negative a* and positive b* values, indicating a propensity to turn greenish or yellowish after weathering, respectively. After weathering, while the surface roughness values of all specimens increased, their gloss decreased. In addition, after weathering, all coated samples had less gloss loss and lower surface roughness than the control group. Our findings show that following weathering, Oriental beech coated with ETO + D230 + C, ETO + D230 + F, and ETO + D230 + G nanocomposites have better surface properties than ETO + D230-coated Oriental beech. Note de contenu : - MATERIALS AND METHODS : Experimental - Methods - Preparation of epoxide-amine coatings - Preparation of epoxide-nanocomposite coatings - Preparation of wood - Color test - Gloss test - Surface roughness test - Weathering test
- RESULTS AND DISCUSSION : Color - Gloss test - Surface roughnessDOI : https://doi.org/10.1007/s11998-023-00860-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00860-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41067
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of new antifouling coating based on alkyd paint modified with hydrophobic cationic biocide in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
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Titre : Preparation and characterization of new antifouling coating based on alkyd paint modified with hydrophobic cationic biocide Type de document : texte imprimé Année de publication : 2024 Article en page(s) : p. 939-953 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
Biofilms
Caractérisation
Hydrophobie
Polyalkydes
Revêtements antisalissures:Peinture antisalissures
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : New water-immiscible cationic biocide 1-dodecylpyridinium dodecylbenzenesulfonate (PyrC12-DBS) has been synthesized and tested as potential antifouling agent for commercial alkyd paint PP-115 (Ukraine). The modified PP-115/PyrC12-DBS coatings containing 8% and 16% (w/w) of PyrC12-DBS were prepared by dissolution directly of the cationic biocide into the PP-115 paint. Once the stainless steel bars were painted, the surface wettability of the coating was found to be significantly increased when modified with cationic biocide. The results of scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) studies indicate high homogeneity of the modified coatings. Infrared analysis revealed hydrogen bonding between ester groups of alkyd resin and pyridinium cations of PyrC12-DBS. The plasticizing effect of the cationic biocide on the alkyd binder has also been revealed by differential scanning calorimetry analysis. According to spectrophotometric analysis data, PyrC12-DBS has excellent resistance to leaching from protective coatings into water. Antibiofilm efficiency of PyrC12-DBS was evaluated by assessing the capability of two biofilm-forming model strains, namely Staphylococcus aureus ATCC 25923 and Pseudomonas aeruginosa PA01, to form attached biofilms on the surface coated with modified alkyd paint. A significant decrease in biofilm metabolic activity, as well as in cell biomass, was determined for PP-115/PyrC12-DBS (16%) coatings. The antifouling activity was evaluated by exposure to experimental substrates in freshwater (Dnipro River) for 143 days. The surface of PP-115/PyrC12-DBS (16%) coatings showed an almost 13-fold reduction of total biomass formed by Dreissenidae mussels compared with control substrates. Overall, the obtained data indicate that the contact-active protective coatings based on water-insoluble polymer matrix and water-insoluble cationic biocide may effectively resist biofouling at relatively high biocide content. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of antifouling coating - Characterization of prepared coatings
- RSULTS AND DISCUSSION : IR analysis - Morphological and surface properties - Raman imaging - EDX imaging - DSC analysis 6 Leaching resistance of PyrC12-DBSDOI : https://doi.org/10.1007/s11998-023-00862-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00862-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41068
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible A durable and multifunctional antifog, antifrost, and self-cleaning/oil repellant UV curable coating based on poly(sorbitol-co-isophorone-co-ethyleneglycol)acrylate / Dhiraj S. Kaikade in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : A durable and multifunctional antifog, antifrost, and self-cleaning/oil repellant UV curable coating based on poly(sorbitol-co-isophorone-co-ethyleneglycol)acrylate Type de document : texte imprimé Auteurs : Dhiraj S. Kaikade, Auteur ; Anagha S. Sabnis, Auteur Année de publication : 2024 Article en page(s) : p. 955-967 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Copolymères -- Synthèse
Photoréticulation
Revêtement auto-nettoyant
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements anti-buée
Revêtements antigel
Revêtements organiques
SorbitolIndex. décimale : 667.9 Revêtements et enduits Résumé : Sorbitol is a naturally occurring sugar alcohol and this work focuses on sorbitol-based UV curable polyurethane coatings for antifog, antifrost, and self-cleaning applications. The resins were synthesized by reacting isophorone diisocyanate (IPDI) with varying proportions of sorbitol and polyethylene glycol (PEG200). The resins synthesized were characterized by FTIR, 1H NMR, and analytical techniques such as hydroxyl, iodine, and acid values. Various formulations were prepared using the developed resin, reactive diluents, and photoinitiator. The coatings were applied on silane-treated glass substrates and then cured under UV light. The hydrophilicity of coatings was investigated by water contact angle measurement. The antifog, antifrost, and self-cleaning tests were carried out and it was observed that the coating shows antifog property for a contact angle below 33° but antifrost effect was shown by the coatings with a contact angle less than 7°. Owing to the excellent hydrophilicity, the black stains of oil were washed out with ease under a water flow, hence showing excellent oil repellent/self-cleaning property as well. Note de contenu : - MATERIALS AND METHODS : Material - Pretreatment of glass slides - Synthesis of prepolymer - Synthesis of poly(sorbitol-co-isophorone-co-ethyleneglycol)acrylate (SIP) - Preparation of coatings - Characterization - Mechanical and durability test - Antifog test - Antifrost test
- RESULTS AND DISCUSSION : Preparation and properties of poly(sorbitol-co-isophorone-co-ethyleneglycol)acrylate (polySIP) coatings - Mechanical and stability tests - Antifog test - Antifrost test - Self-cleaning testDOI : https://doi.org/10.1007/s11998-023-00863-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00863-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41069
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Bismuth oxide nanoparticles/waterborne polyurethane-coated fabrics for ionizing radiation protection / Bilge Koyuncu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Bismuth oxide nanoparticles/waterborne polyurethane-coated fabrics for ionizing radiation protection Type de document : texte imprimé Auteurs : Bilge Koyuncu, Auteur ; Nebahat Aral, Auteur ; Cevza Candan, Auteur ; Banu Nergis, Auteur Année de publication : 2024 Article en page(s) : p. 969-978 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Blindage (rayonnements)
Nanoparticules
Oxyde de bismuth
Rayonnements ionisants
Revêtements -- Analyse
Revêtements en phase aqueuse
Revêtements organiques
Tests d'efficacité
Textiles et tissusIndex. décimale : 667.9 Revêtements et enduits Résumé : Ionizing radiation is the energy in the form of waves or particles that has the power to eject electrons from atoms and its main sources are radiological and nuclear medical examinations, cancer treatments, X-rays and gamma rays used in industry, and nuclear accidents. Since ionizing radiation has negative effects on human health, it is important to be protected against it by using shielding materials. In this study, a coating material comprising nano bismuth oxide and waterborne polyurethane (40% w/w WPU and 60% w/w Bi2O3) was developed and applied on to a commercially available, lightweight woven fabrics for fabricating wearable as well as flexible shielding materials. The X-ray shielding performance of the samples was measured as described in standard TS EN 61331-1:2014 at tube voltages of 40 kV, 60 kV, 80 kV, and 100 kV. In addition to the characterization analyses (i.e. SEM–EDS and FTIR), the coated fabrics were also subjected to some textile based performance tests, namely, water contact angle, abrasion, and stiffness in accordance with the relevant standards. The results of nano bismuth oxide and waterborne polyurethane-coated fabrics demonstrated promising results not only for X-ray shielding performance but also for the tested textile properties. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials - Coating - Thickness and weight measurement - Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) - Fourier-transform infrared spectroscopy (FTIR) - Water contact angle measurement - Abrasion test - Stiffness testing - Radiation attenuation measurement
- RESULTS AND DISCUSSION : SEM–EDS analysis - FTIR analysis - Radiation shielding performance - Water contact angle - Abrasion resistance and stiffnessDOI : https://doi.org/10.1007/s11998-023-00864-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00864-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41070
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Sucrose-derived carbon membranes for sustainable water desalination / Adi Darmawan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Sucrose-derived carbon membranes for sustainable water desalination Type de document : texte imprimé Auteurs : Adi Darmawan, Auteur ; Hasna Ulfa Nurfadila, Auteur ; Ayu Sri Wahyuni, Auteur ; Hasan Muhtar, Auteur ; Yayuk Astuti, Auteur Année de publication : 2024 Article en page(s) : p. 979-991 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumine
Caractérisation
Carbone
Eau de mer -- Dessalement
Membranes (technologie)
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 organiques
SaccharoseIndex. décimale : 667.9 Revêtements et enduits Résumé : Synthesis and preparation of carbon membranes have been carried out and applied for desalination. Carbon is obtained from sucrose by pyrolyzing at various temperatures. Carbon membranes are made by coating alumina tubes with sucrose solution using dip-coating. The effect of carbonization temperature on the character of the membrane material and the desalination performance was investigated. This study’s results indicate that the carbonization temperature modifies the characteristics of membrane material. TGA data show that solid sucrose is thermally stable up to 210°C. This result aligns with the FTIR results, which show that functional group changes occur when the carbonization temperature exceeds 200°C. The GSA data shows that the resulting adsorption isotherm is type V, indicating mesoporous material. However, the volume and pore size of the carbon membrane material is minimal. SEM results show that carbon is dense but not equitably distributed. The salt rejection reached 100%, and the water flux was greater than 10 kg.m−2.h−1 at a feed concentration of 1% and a temperature of 60°C. Salt rejection is consistent at around 100% for up to 60 h for long-term testing. The absence of significant alterations indicates the high stability of the carbon membrane. Note de contenu : - METHODOLOGY : Preparation of carbon membrane material - Coating of carbon membrane material on alumina tube - Membrane material characterization - Carbon membrane desalination
- RESULTS AND DISCUSSION : Preparation of carbon materials and carbon membranes - Thermal properties of sucrose - Functional groups of carbon materials - XRD analysis of carbon materials - Structure and characteristics of pores - Surface properties of membrane - Membrane desalination performanceDOI : https://doi.org/10.1007/s11998-023-00866-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00866-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41071
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Integration of unmodified kraft lignin powder in waterborne coatings and investigation of antifouling properties / Marcel Butschle in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Integration of unmodified kraft lignin powder in waterborne coatings and investigation of antifouling properties Type de document : texte imprimé Auteurs : Marcel Butschle, Auteur ; Richard Schlautek, Auteur ; Lisa Kunschert, Auteur ; Markus Schackmann, Auteur ; Claus Erik Weinell, Auteur ; Kim Dam-Johansen, Auteur Année de publication : 2024 Article en page(s) : p. 993-1003 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Charges (matériaux)
Concentration pigmentaire volumique
Formulation (Génie chimique)
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.
Revêtements antisalissures
Revêtements en phase aqueuse
Salissures biologiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Antifouling properties of unmodified kraft lignin for potential use in marine coatings were investigated. The study was based on preliminary findings that pointed toward lignin’s efficacy against seawater organisms during laboratory tests. Coatings were formulated that contained lignin as a filler and had a pigment volume concentration above the critical pigment volume concentration. This ensured direct interaction between lignin and seawater organisms, as the lignin particles remained incompletely wetted by the binder. Moreover, all formulations were waterborne to mitigate the release of volatile organic compounds. Despite the initial promise, the antifouling performance of the formulated lignin coatings during field experiments at the CoaST Maritime Test Center was limited, and the anticipated mechanism must be reconsidered. Additionally, it was found that high lignin concentrations, while facilitating organism interaction, compromised the coating's mechanical properties. Nevertheless, the waterborne coating formulation introduced here might provide a foundation for other researchers to further investigate lignin’s potential as a bio-based pigment or a filler in coatings. Note de contenu : - MATERIALS AND METHODS : Raw materials - Coating formulation -
Sample preparation - Coating properties - Antifouling properties
- RESULTS AND DISCUSSION : Early fouling screening - Coating formulation - Coating properties - Antifouling performance during field immersion
- Table 1 : Coating raw materials for the investigation of antifouling properties of lignin
- Table 2 : Slurry formulations
- Table 3 : Final PU coating formulations for mechanical testing and fouling control performance
- Table 4 : Final EP coating formulations for mechanical testing and fouling control performance
- Table 5 : Formulations for rheology measurements
- Table 6 : Critical pigment volume concentrations of the used pigmentsDOI : https://doi.org/10.1007/s11998-023-00867-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00867-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41072
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Durability of photocatalytic ZnO-based surface coatings and preservation of their antibacterial effect after simulated wear in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Durability of photocatalytic ZnO-based surface coatings and preservation of their antibacterial effect after simulated wear Type de document : texte imprimé Année de publication : 2024 Article en page(s) : p. 1005-1016 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
Oxyde de zinc
Photocatalyse
Polyacryliques
Revêtement de surface
Revêtements -- Analyse
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : This study focused on antibacterial durability testing of surface coatings based on acrylic matrix-embedded UVA-activated ZnO. Such coatings on stainless steel were treated by dry rubbing, wet rubbing, and abrasive treatment to simulate wearing during everyday touching, cleaning, and aggressive scrubbing. Abrasive treatment caused clear topological changes to the surfaces, flattened the surface at the micrometer scale, and released a significant amount of surface material, which was partly acrylic matrix and partly the embedded ZnO. The highest release of Zn, the most prominent photocatalytic activity under UVA and the greatest antibacterial effect, was observed for abrasively treated surfaces. Although a small amount of surface material was released from surfaces after dry and wet rubbing, no significant increase in Zn release or photocatalytic activity was detected. On the contrary, antibacterial activity after those treatments decreased in comparison with untreated surfaces, likely due to partial surface masking by the released acrylic matrix. In summary, our results indicate that antimicrobial ZnO material immobilized in acrylic matrix creates stable surface coatings that may lose some of their efficacy during daily use and cleaning procedures, but activity of which will be retained during a more aggressive abrasion procedure. Note de contenu : - MATERIALS AND METHODS : Preparation of ZnO micro- and nanocomposite-based surface coatings - Treatment of coated surfaces for simulated wear - Photocatalytic activity measurement - Scanning electron microscopy imaging - Contact angle measurements - Determination of Zn release from surfaces - Antibacterial activity evaluation - Statistical analysis
- RESULTS AND DISCUSSION : Physical changes of surface coatings during simulated wear - Photocatalytic activity of surface coatings after simulated wear - Antibacterial activity of surface coatings after simulated wearDOI : https://doi.org/10.1007/s11998-023-00868-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00868-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41073
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Chloride transmission in silane composite emulsion-protected concrete under the coupling effect of flexural loading and wetting–drying cycles / Mengjun Hu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Chloride transmission in silane composite emulsion-protected concrete under the coupling effect of flexural loading and wetting–drying cycles Type de document : texte imprimé Auteurs : Mengjun Hu, Auteur ; Shaochun Li, Auteur ; Xu Chen, Auteur ; Shiyu Sui, Auteur ; Yongjuan Geng, Auteur ; Jialin Jiang, Auteur ; Zhijun Liu, Auteur Année de publication : 2024 Article en page(s) : p. 1017-1030 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chlorures
Essais (technologie)
Isobutyltriethoxysilane
Matériaux cimentaires -- Revêtements protecteurs
Orthosilicate de tétraéthyleL'orthosilicate de tétraéthyle (TEOS) est un composé chimique de formule Si(OCH2CH3)4 ou plus simplement Si(OEt)4; l'abréviation TEOS (pour tetraethylorthosilicate) est généralement utilisée dans l'industrie du sol-gel, où il est intensivement étudié. La majorité des études en sol-gel pour des sols de silices ont utilisé ce produit comme précurseur.
Le TEOS est généralement produit par alcoolyse du tétrachlorure de silicium SiCl4 dans de l'éthanol CH3CH2OH :
SiCl4 + 4 CH3CH2OH → Si(OCH2CH3)4 + 4 HCl.
Il est utilisé pour la réticulation de silicones et possède certaines applications comme précurseur du dioxyde de silicium SiO2 dans l'industrie des semi-conducteurs6 dans le cadre d'une réaction sol-gel. La propriété remarquable du TEOS est en effet de former du SiO2 par simple hydrolyse en libérant de l'éthanol CH3CH2OH :
Si(OCH2CH3)4 + 2 H2O → SiO2 + 4 CH3CH2OH.
Oxyde de graphène
Réaction de couplage
Revêtements en phase aqueuse
Revêtements organiques
SilanesIndex. décimale : 667.9 Revêtements et enduits Résumé : The coupling effect of flexural loading and wetting–drying cycles on chloride transmission in silane composite emulsion-protected concrete is presented in this paper. Graphene oxide/isobutyltriethoxysilane (GS) and tetraethyl orthosilicate/isobutyltriethoxysilane (TS) composite emulsion was prepared to obstruct the penetration of chloride, and the influence of flexural loading and exposure time on the protective effect were mainly considered. The results show that the content and diffusion coefficient of chloride are affected significantly by flexural loading, exposure age, and protective emulsion. Loads with different stress ratios affect the internal transmission of chloride by changing the compactness of concrete. The prolongation of the exposure age leads to the accumulation of chloride, thereby increasing the internal chloride contents of concrete. The GS/TS composite emulsion reacts with the hydration products to form the hydrophobic layer, which can significantly prevent the penetration of chloride. In particular, the protective performance of GS under low stress ratios is better than that of TS, while under high stress levels, TS has better resistance to chloride erosion. Relatively speaking, the long-term protective effect of GS is better than that of TS. Note de contenu : - MATERIALS AND METHODS : Materials - Test methods
- RESULTS AND DISCUSSION : The content of chloride in silane-protected concrete subjected to flexural loading and wetting-drying cycles - Diffusion coefficient of chloride in silane-protected concrete subjected to flexural loading and wetting-drying cycles
- Table 1 : Chemical composition of cement (%)
- Table 2 : Materials for preparing the silane composite emulsions
- Fig. 1 : Preparation of composite emulsionDOI : https://doi.org/10.1007/s11998-023-00869-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00869-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41074
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible The impact of stainless steel flakes as a novel multifunctional pigment for wood coatings / Massimo Calovi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : The impact of stainless steel flakes as a novel multifunctional pigment for wood coatings Type de document : texte imprimé Auteurs : Massimo Calovi, Auteur ; Stefano Rossi, Auteur Année de publication : 2024 Article en page(s) : p. 1031-1047 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier inoxydable
Bois -- Revêtements protecteurs
Bois -- Revêtements:Bois -- Peinture
Caractérisation
Matériaux -- Propriétés fonctionnelles
Paillettes
Particules (matières)
Particules -- Morphologie
Résistance à l'abrasion
Revêtements -- Propriétés thermiques
Revêtements en phase aqueuse -- Additifs
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The purpose of this research was to determine the influence of three different amounts of stainless steel flakes on the aesthetic features and durability of a waterborne wood paint. Colorimetric measurements and optical microscope observations were employed to assess the impact of this novel pigment on the overall appearance of the coatings. The effect of the different amounts of metallic flakes on the durability of the layers was evaluated by subjecting the samples to UV-B radiation and cyclic thermal shocks, performing infrared spectroscopy analysis, colorimetric inspections, and adhesion test. In addition, the influence of the filler concentration on the coating barrier efficiency was assessed through the liquid resistance and water uptake tests. Moreover, Buchholz hardness indentation test and the scrub test were conducted to quantify the impact of the flakes on the mechanical characteristics of the coatings, such as hardness and abrasion resistance. Finally, the thermal test evidenced a specific role of the flake amount in altering the thermal behavior of the coatings. Ultimately, this work highlights the attractive effect of stainless steel flakes, which are capable of providing an intense coloring and specific aesthetic features to the paint, preserving the surface's barrier-protective properties, increasing the abrasion resistance of the composite layer, and influencing the thermal behavior of the coating. Note de contenu : - MATERIALS AND METHODS : Materials - Sample production - Characterization
- RESULTS AND DISCUSSION : Flakes and coatings morphology - Durability of the coatings in aggressive environments - Coatings liquid resistance - Coatings hardness and abrasion resistance - Coatings thermal behaviorEn ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00870-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41075
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Biomass adenosine triphosphate filler for improving the fire resistance and smoke suppression of intumescent coatings / Shaowu Ke in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Biomass adenosine triphosphate filler for improving the fire resistance and smoke suppression of intumescent coatings Type de document : texte imprimé Auteurs : Shaowu Ke, Auteur ; Cheng Wang, Auteur ; Yongjun Shu, Auteur ; Junfeng Yang, Auteur ; Qilin Liang, Auteur ; Qi Zhang, Auteur ; Zhitian Liu, Auteur Année de publication : 2024 Article en page(s) : p. 1049-1065 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adénosine triphosphate L’adénosine triphosphate, ou ATP, est un nucléotide formé à partir d'un nucléoside à un triphosphate. Dans la biochimie de tous les êtres vivants connus, l'ATP fournit l'énergie nécessaire aux réactions chimiques du métabolisme, à la locomotion, à la division cellulaire, ou encore au transport actif d'espèces chimiques à travers les membranes biologiques. Afin de libérer cette énergie, la molécule d'ATP est clivée, par hydrolyse, en adénosine diphosphate (ADP) et en phosphate, réaction qui s'accompagne d'une variation d'enthalpie libre standard ΔG0′ de −30,5 kJ mol−1. Les cellules régénèrent ensuite l'ATP à partir de l'ADP essentiellement de trois manières différentes : par phosphorylation oxydative dans le cadre de la respiration cellulaire, par photophosphorylation dans le cadre de la photosynthèse, et par phosphorylation au niveau du substrat au cours de certaines réactions chimiques exergoniques, par exemple au cours de la glycolyse ou du cycle de Krebs. Ainsi, le corps humain ne contient à chaque instant qu'environ 250 g d'ATP mais consomme et régénère chaque jour de l'ordre de son propre poids en ATP.
Biomatériaux
Calorimétrie
Caractérisation
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)
Résistance à l'humidité:Résistance à l'eau
Résistance à la flamme
Revêtements -- Analyse
Revêtements -- Propriétés thermiques
Revêtements en phase aqueuse
Revêtements protecteurs
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In recent years, green environment protection has received widespread research interest. In this study, a green, bio-based compound, adenosine triphosphate (ATP), was introduced into the intumescent flame retardant system to improve the flame retardant properties of waterborne fireproof coatings. The flame retardant properties of the sample with 2 wt% ATP were characterized by fire resistance tests, thermogravimetric analysis, cone calorimetric analysis, and other tests. The results revealed that the 2 wt% ATP coating sample exhibited a reduced fire resistance temperature of approximately 73°C at 60 min compared with that of the blank sample (i.e., the unmodified sample), and the residual carbon increased from 28% to 36% at 800°C. Furthermore, the peak of the heat release rate and the total heat release for the sample with 2 wt% ATP were 7.87% and 14.10% lower than those for the blank sample, respectively. Additionally, the total smoke production and peak smoke release rate for the modified sample were 33.60% and 22.54% lower than those for the blank sample, respectively. Therefore, this work provides a good prospect for the application of bio-based ATP, which can be applied in the fabrication of fire-resistant and smoke-suppressive coatings for structural steel and also provides a simple and efficient strategy for green, bio-based flame retardants, which is expected to expand their application scope in fireproof coatings. Note de contenu : - MATERIALS AND METHODS : Materials - Solid content - Preparation of coatings - Characterization
- RESULTS AND DISCUSSION : Fire resistance analysis - Muffle burning test - Thermal stability of the coatings - Semi-quantitative calculation of synergies - Cone calorimetric analysis of the fireproof coatings - Scanning electron microscopy analysis - Raman spectroscopy of the carbon layer - X-ray photoelectron spectroscopy analysis - Infrared spectrum analysis of the carbon layer - Water tolerance of the coatings
- Flame retardant mechanism analysis
- Table 1 : The formulation of the intumescent coatingsDOI : https://doi.org/10.1007/s11998-023-00871-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00871-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41076
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Investigation of the effect of fluorine and silane-containing monomers on waterborne hybrid (alkyd/styrene acrylic) latexes / Nurullah Kartaloglu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Investigation of the effect of fluorine and silane-containing monomers on waterborne hybrid (alkyd/styrene acrylic) latexes Type de document : texte imprimé Auteurs : Nurullah Kartaloglu, Auteur ; Ali Delibas, Auteur Année de publication : 2024 Article en page(s) : p. 1067-1084 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acides gras
Chanvre et constituantsLe chanvre ou chanvrier (Cannabis sativa L.) est la seule espèce du genre botanique Cannabis. Ce terme latin est souvent utilisé aussi comme nom vernaculaire pour distinguer les variétés de chanvre cultivé à usage industriel des variétés de cannabis à usage récréatif ou médical. C'est une espèce de plante annuelle, de la famille des Cannabaceae. La graine de chanvre s'appelle le chènevis.
Copolymère styrène acrylique
Durée de vie (Ingénierie)
Essais (technologie)
Formulation (Génie chimique)
Huiles et graisses végétales
Hydrophobie
Latex
Matériaux hybrides
Mesure
Pins et constituants
Polymères -- Synthèse
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Due to the significant importance of waterborne polymers in terms of sustainability, researchers have undertaken the process of transferring alkyd resins into waterborne latex. In this study, two distinct types of alkyd resins were meticulously prepared through the esterification of sustainable sources, namely hemp seed oil (HSO) and pine fatty acid (TOFA), with polyols and dibasic acids. The goal of this research was to synthesize hydrophobic waterborne hybrid polymer emulsions, combining alkyd and styrene acrylic components. This was achieved through a semibatch mini-emulsion polymerization process involving styrene, butyl acrylate, and acrylic acid. The alkyd resins, derived from sustainable sources, were integrated into the polymerization process along with hydrophobic monomers that contained either fluorine or silane groups. Based on the alkyd content, polymer emulsions were examined in three classes: pure polymer emulsions without alkyd (0% alkyd), 10% HSO-based alkyd-containing polymer emulsions (10% HSO-based), and 10% TOFA-based alkyd-polymer emulsions (10% TOFA). Polymer emulsions in each class were first modified with 3% and 6% triethoxyvinyl silane (VTES) and 2,2,2-trifluoroethyl methacrylate (TFEMA) to obtain a total of 12 different modified latexes. The structure of the synthesized latex was characterized by FTIR and 1H-NMR, while the morphology of the latex was examined by AFM, STEM, EDAX, particle size, and zeta potential measurements. The thermal and mechanical properties of the materials were assessed using DSC, TGA, and tensile testings. Lastly, the water contact angle was used to gauge the hydrophobicity of the latexes. The findings revealed that TFEMA and VTES hydrophobic monomers significantly influenced the mechanical, thermal, and hydrophobic properties of hybrid (alkyd/styrene acrylic) polymer emulsions and films. Note de contenu : - EXPERIMENTAL : Materials - Alkyd resins synthesis - Synthesis of hydrophobic waterborne hybrid (alkyd/styrene acrylic) emulsion polymers modified with fluorine and silane-containing monomers - Tests and measurements
- RESULTS AND DISCUSSION : Evaluation of TOFA and HSO - Evaluation of waterborne hydrophobic hybrid (alkyd/styrene acrylic) polymer emulsions containing VTES and TFEMA
- Table 1 : Chemicals used in the study
- Table 2 : Formulation of alkyd resin synthesis
- Table 3 : Formulation of hydrophobic waterborne hybrid (alkyd/styrene acrylic) emulsion polymers
- Table 4 : Physicochemical properties of hydrophobic hybrid latexesDOI : https://doi.org/10.1007/s11998-023-00873-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00873-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41077
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible An A2 + CB2 approach to the synthesis of hyperbranched polyester polyol and application in PU coatings / Amardip M. Patil in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : An A2 + CB2 approach to the synthesis of hyperbranched polyester polyol and application in PU coatings Type de document : texte imprimé Auteurs : Amardip M. Patil, Auteur ; Dhammanand J. Shirale, Auteur ; Harishchandra D. Jirimali, Auteur ; Ramanand N. Jagtap, Auteur Année de publication : 2024 Article en page(s) : p. 1085-1095 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse morphologique
Caractérisation
Enrobage (technologie)
Polymères -- Synthèse
Polymères ramifiés
Polyuréthanes
Résistance chimique
Revêtements -- Analyse
Revêtements organiques
Stabilité thermique
Surfaces -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : In the present work, neopentyl glycol was used as a core for the synthesis of hyperbranched polymer by melt condensation polymerization with 2,2-Bis(hydroxymethyl) propionic acid. The A2 + CB2 synthetic method was used where neopentyl glycol was A2 and 2,2-Bis(hydroxymethyl) propionic acid was CB2. The acid value and hydroxyl values of the synthesized hyperbranched polymer were determined according to ASTM D974 and ASTM D4274, respectively. The molecular structural characterizations of hyperbranched polyol were determined by FTIR and NMR spectroscopy techniques. The hyperbranched polyurethanes were synthesized by using hyperbranched polyol and crosslinking agent isophorone diisocyanate in different mole ratios of OH:NCO (1:1.2, 1:1.4, 1:1.6). These mixtures were used as coating materials on mild steel panels and glass plates. The coating properties of polyurethanes such as gloss and cross-cut adhesion were studied. The immersion test of coatings was carried out in HCl, NaCl, NaOH and water. The electrochemical properties of the coatings were examined using an electrochemical method in electrolytes consisting of HCl, NaOH, and NaCl. Thermal stability and surface morphology were studied by TGA and SEM, respectively. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of hyperbranched polyester polyol (HBP) from neopentyl glycol (NG) - Preparation of hyperbranched polyurethane (HBPU) - Characterizations - Functional group analysis - Structural study - Coating properties - Chemical resistance - Electrochemical study - Thermogravimetric study - Study of scanning electron microscopy images
- RESULTS AND DISCUSSION : Study of FTIR and NMR spectra - Coating properties - Chemical resistance - Electrochemical study of the HBPU coatings - Thermogravimetric analysis of HBPU - Study of scanning electron microscopy imagesDOI : https://doi.org/10.1007/s11998-023-00875-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00875-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41078
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Open-air plasma-assisted deposition of organosilicon coating for corrosion protection of AZ91D Mg alloy / Jiheon Jun in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Open-air plasma-assisted deposition of organosilicon coating for corrosion protection of AZ91D Mg alloy Type de document : texte imprimé Auteurs : Jiheon Jun, Auteur ; Yi-Feng Su, Auteur ; John E. Wade IV, Auteur ; Daphne Pappas, Auteur ; Andrew Sy, Auteur ; Ryan Robinson, Auteur ; Yong Chae Lim, Auteur Année de publication : 2024 Article en page(s) : p. 1097-1111 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Magnésium -- Alliages
Métaux -- Revêtements protecteurs
Organosilicones
Surfaces -- Analyse
Technique des plasmasIndex. décimale : 667.9 Revêtements et enduits Résumé : As a corrosion barrier layer, open-air plasma-assisted organosilicon coating was applied on AZ91D Mg alloy. Organosilicon-coated AZ91D samples, prepared from two different plasma coating processes, were used for corrosion evaluation based on multistep electrochemical and H2 collection measurements in 3.5 wt% sodium chloride (NaCl) solution. Some coated AZ91D samples were characterized with and without corrosion exposure in NaCl solution using electron microscopies and X-ray chemical analysis techniques. The results indicate that the organosilicon coatings from open-air plasma processes are effective to delay the initiation of corrosion attack and also reduce the corrosion rate for AZ91D substrate. The corrosion attack was considered to develop after permeation of NaCl solution through the coating layer. Note de contenu : - EXPERIMENTAL : Materials - Atmospheric plasma cleaning and organosilicon coating processes - Corrosion evaluation - Microscopic and chemical element characterizations
- RESULTS AND DISCUSSION : Characterizations of as-coated AZ91D - Corrosion analysis - Characterization of post-immersion samplesDOI : https://doi.org/10.1007/s11998-023-00876-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00876-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41079
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Cationic UV-cured epoxy coating with inhibitor-loaded nanoparticles: photoinitiated cationic polymerization, mechanical properties and corrosion protection of steel / Thien Vuong Nguyen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Cationic UV-cured epoxy coating with inhibitor-loaded nanoparticles: photoinitiated cationic polymerization, mechanical properties and corrosion protection of steel Type de document : texte imprimé Auteurs : Thien Vuong Nguyen, Auteur ; Vy Do Truc, Auteur ; Tuan Anh Nguyen, Auteur ; Dai Lam Tran, Auteur Année de publication : 2024 Article en page(s) : p. 1113-1124 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
Caractérisation
Dioxyde de silicium
Enrobage (technologie)
Epoxydes
Essais de brouillard salin
Formulation (Génie chimique)
Inhibiteurs (chimie)
Métaux -- Revêtements protecteurs
Nanoparticules
Photoamorceurs (chimie)
Polyaddition
Revêtements -- Propriétés mécaniques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : This work aims to explore how the cationic UV-curing technology can be applied for corrosion protection of metals. For this purpose, the cationic UV-curing epoxy coating is prepared on the steel surface, with addition of the inhibitor-loaded nanoparticles. To reveal the effect of Ce-loaded SiO2 nanoparticles on the photoinitiated cationic polymerization of epoxy coating, various measurements have been carried out during the UV irradiation, such as the consumption of photoinitiator (triarylsulfonium hexafluoroantimonate salts, TAS), conversion of epoxy groups, gel fraction, swelling degree and relative hardness of coating samples. To evaluate the effect of Ce-loaded SiO2 nanoparticles on mechanical and anticorrosion properties of UV-cured epoxy coating, the impact strength, abrasion resistance, electrochemical impedance spectroscopy and salt spray tests have been carried out and analyzed. The experimental data indicate that the incorporation of Ce-loaded SiO2 nanoparticles into epoxy matrix reduces both the relative hardness, gel fraction and the conversion of TAS photoinitiator and epoxy groups. However, the presence of these nanoparticles increases both impact strength, abrasion resistance and anticorrosion performance of the cationic UV-cured epoxy coating. Note de contenu : - EXPERIMENTAL SECTION : Materials - Fabrication of cationic UV-curing epoxy coatings - Coating characterization
- RESULTS AND DISCUSSIONS : UV-initiated cationic polymerization of epoxy coating - Morphology and mechanical properties of cationic UV-cured epoxy coatings - Effect of SiO2@Ce3+ nanoparticles on the corrosion protection of UV-cured epoxy coating - Salt spray test
- Table 1 : Coating formulations of the cationic UV-curing epoxy coatingsDOI : https://doi.org/10.1007/s11998-023-00878-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00878-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41080
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Regulate solar irradiation with smart microshutters / Kewei Jiang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Regulate solar irradiation with smart microshutters Type de document : texte imprimé Auteurs : Kewei Jiang, Auteur ; Zixuan Sun, Auteur ; Xingce Fan, Auteur ; Xiao Tang, Auteur ; Guoqun Li, Auteur ; Mingze Li, Auteur ; Teng Qiu, Auteur ; Qi Hao, Auteur Année de publication : 2024 Article en page(s) : p. 1125-1130 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Economies d'énergie
Fenêtres -- Conception et construction
hydrocolloïdes
Matériaux intelligents
Matériaux thermodéformables
ThermochromieIndex. décimale : 667.9 Revêtements et enduits Résumé : Thermochromic windows have emerged as promising candidates for energy-efficient buildings owing to their passive and self-regulating characteristics. Herein, we propose thermal-deformable microshutters as smart coatings for thermochromic window applications. These microshutters employ multilayer nanomembranes, specifically utilizing a thermodeformable hydrogel layer, to synergistically combine mechanical and thermal properties. Through careful geometry design and optimizations, the microshutters can effectively obstruct light transmission at above 32 °C; meanwhile, at lower temperatures, they undergo a phase transition and roll up, enabling light to penetrate indoors. Moreover, the light transmission can be modulated by integrating supplementary color layers into the membranes to block light at specific wavelengths as required, which significantly expands the application potential of this intelligent energy-saving window. Note de contenu : - Fabrication of the microshutters
- CharacterizationsDOI : https://doi.org/10.1007/s11998-023-00881-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00881-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41081
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Fabrication of hydrophobic coatings on paper substrates using silicone oil impregnated silica : a promising sustainable packaging material / Angitha Francy in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Fabrication of hydrophobic coatings on paper substrates using silicone oil impregnated silica : a promising sustainable packaging material Type de document : texte imprimé Auteurs : Angitha Francy, Auteur ; T. M. Ragi, Auteur ; A. Peer Mohamed, Auteur ; S. Ananthakumar, Auteur Année de publication : 2024 Article en page(s) : p. 1131-1144 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Huile de silicone
Hydrophobie
Matériaux -- Imprégnation
Matériaux d'emballage
Matériaux fibreux
Nanoparticules
Papier -- Revêtements
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.
Revêtements organiques
Revêtements protecteurs
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.Index. décimale : 667.9 Revêtements et enduits Résumé : Paper substrates possessing features ranging from hydrophobic to oxygen-barrier functional properties are gaining great attention recently due to the global ban on single-use plastics as well as the compulsion to avoid nonbiodegradable polymer packing. In this work, hydrophobic silica carriers are processed first through a direct physical impregnation of silicone oil in various amounts into the 20-nm sized silica nanoparticles and subsequently analyzed for the progressive changes in the surface hydrophobicity by water contact angle measurements. The hydrophobic nano-silica was also systematically analyzed by XRD, TGA, FTIR, SEM, and TEM and the results are presented. It was found that the nano-silica with the bulk BET surface area of 157 m2/g can accommodate 2.5 g of silicone oil per gram of silica, finally resulting in hydrophobic silica with a maximum contact angle of 139°. Later, this hydrophobic nano-silica was dispersed in a polymethylmethacrylate (PMMA) matrix and a coating formulation was prepared to develop water-repellent self-cleaning functional coatings on eco-friendly paper substrates. While applied as topcoats on paper substrates, the hydrophobic silica-PMMA gets embedded into the porous fibrous cellulose network and converts it into an impressive water-repellent packaging material with a contact angle of about 142°. This facile inorganic–organic hybrid topcoat strategy was successfully applied on the fibrous cellulose sludge waste produced by the paper mills to produce lightweight, water/moisture resistance packing material for circular economy. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of hydrophobic silica - Preparation of hydrophobic coatings on paper substrates - Self-cleaning test of paper substrates - Water vapor permeability test of paper samples - Characterizations
- RESULTS AND DISCUSSION : Characterizations of siliconized silica - Characterizations of SS-PMMA hybrid coatings on paper substrates - Wettability of SS-PMMA hybrid-coated paper substrates - Water vapor transmission and moisture-resistant properties of paper substrates - Mechanical and chemical properties of paper substratesDOI : https://doi.org/10.1007/s11998-023-00882-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00882-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41082
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Anticorrosive barrier coatings modified by core-shell rubber particles : effects on the property transients and premature crack initiation susceptibility of particle type and concentration / Qiong Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Anticorrosive barrier coatings modified by core-shell rubber particles : effects on the property transients and premature crack initiation susceptibility of particle type and concentration Type de document : texte imprimé Auteurs : Qiong Li, Auteur ; Søren Kiil, Auteur Année de publication : 2024 Article en page(s) : p. 1145-1162 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caoutchouc
Caractérisation
Core-Shell
Epoxydes
Matériaux -- Propriétés barrières
Particules (matières)
Revêtement en phase solvant
Revêtements organiques
Titanate de strontiumIndex. décimale : 667.9 Revêtements et enduits Résumé : Protective epoxy coatings, as a result of their inherent brittleness, show insufficient resistance towards initiation and propagation of cracks, which can occur as early as during the curing process. To improve premature crack initiation resistance, it is essential to understand the underlying mechanisms. In this work, a solvent-based novolac epoxy, cured with a cycloaliphatic amine, was reinforced with either an epoxypropoxypropyl-terminated polydimethylsiloxane (PDMS), nanoparticles of strontium titanate (SrTiO3), or core-shell rubber (CSR) nanoparticles. The effects on coating property transients, curing-induced internal stress, and premature crack initiation susceptibility of the modifier types and CSR (MX 217 and MX 267) concentrations were investigated. In addition, using a digital microscope, the defect and crack morphology in coatings applied to rigid, flat substrates and inner 90-degree angles were characterized. Finally, to evaluate the anticorrosive barrier performance of the reinforced coatings, an electrochemical impedance spectroscopy analysis was employed. Despite a slightly reduced crack initiation susceptibility, the flexible PDMS chains, due to phase separation, resulted in a deteriorated barrier performance. The inclusion of SrTiO3 nanoparticles also led to a reduced anticorrosion performance, relative to a neat epoxy coating, with a slightly lower crack initiation susceptibility and a minor increase (around 0.2 MPa) in the average internal stress. For 5 wt% MX 217 and MX 267 CSR toughened coatings, the maximum internal stress and crack initiation susceptibility in the series, as well as an associated reduced corrosion resistance, were seen. In spite of a reduction in the elastic modulus, an improved barrier performance and a reduced internal stress and crack initiation susceptibility were observed for 25 wt% MX 217 and 37 wt% MX 267 CSR toughened coatings. To improve barrier properties and avoid premature crack initiation of epoxy coatings, guidelines on modifier selection are provided. Note de contenu : - EXPERIMENTAL : Materials and coating preparation - Characterizations
- RESULTS AND DISCUSSION : Effect of modifier type - Effects of CSR concentrations - Effects of modifiers on coating barrier propertiesDOI : https://doi.org/10.1007/s11998-023-00885-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00885-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41083
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 1145-1162[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24737 - Périodique Bibliothèque principale Documentaires Disponible 24688 - Périodique Bibliothèque principale Documentaires Disponible Engineering of new anti-biofilm phosphonium thin coatings onto polymeric films / Matan Nissim in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Engineering of new anti-biofilm phosphonium thin coatings onto polymeric films Type de document : texte imprimé Auteurs : Matan Nissim, Auteur ; Sivan Shoshani, Auteur ; Taly lline-Vul, Auteur ; Gila Jacobi, Auteur ; Eyal Malka, Auteur ; Ehud Banin, Auteur ; Shlomo Margel, Auteur Année de publication : 2024 Article en page(s) : p. 1163-1170 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Couches minces
PhosphoniumLe cation phosphonium (plus rarement phosphinium) est un cation polyatomique de formule PH4+, mais le terme désigne également ses dérivés substitués PR4+2.
Les sels du composé parent sont peu courants, mais cet ion est un intermédiaire dans la préparation industrielle du chlorure de tétrakis(hydroxyméthyl)phosphonium, un composé important : PH3 + HCl + 4 H2C=O → P(CH2OH)4+Cl-.
Les sels de phosphonium organiques sont des réactifs communs en laboratoire. Ceux avec une liaison P-H sont produits par protonation des phosphines : PR3 + H+ → HPR3+.
Beaucoup de cations de phosphonium organiques quaternaires (P+R4) sont produits par alkylation des organophosphines. Par exemple, la réaction entre la triphénylphosphine et l'iodométhane donne l'iodure de méthyltriphénylphosphonium, un précurseur d'ylure de phosphore : PPh3 + CH3I → CH3PPh3+I-.
Le cation tétraphénylphosphonium (PPh4+) est un agent de précipitation utile, analogue aux sels d'ammonium quaternaire utilisés comme catalyseurs de transfert de phase.
Polypropylène
Revêtements protecteurs
Silanes
Surfaces antimicrobiennes
Traitement coronaIndex. décimale : 667.9 Revêtements et enduits Résumé : Biofilms comprising sessile microorganisms attached to surfaces are increasingly researched for their importance in medicine and industry. Current studies focus on development of antibiotics that unfortunately can lead to resistance and environmental pollution. Phosphonium cations are known to exhibit significant activity with less resistance. Here, silane-phosphonium thin coatings are applied by Stöber polymerization of new silane-phosphonium monomer onto oxidized polypropylene film to eliminate phosphonium leaching and reduce the risk of environmental pollution. The composition and morphology were investigated by infrared spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy and contact angle measurements. Coating durability was assessed by adhesion test. The significant anti-biofilm activity against S. aureus and E. coli suggests applications in medicine and agriculture. Note de contenu : - MATERIALS AND METHODS : Materials - Methods
- CHARACTERIZATION
- RESULTS AND DISCUSSION : Mass spectrometry (MS) of the silane-phosphonium monomer - FTIR/ATR spectra of PP films and silane-phosphonium coating - X-ray photoelectron spectroscopy (XPS) - Atomic force microscopy (AFM) - Coating durability - Anti-biofilm activity of the coating onto corona-treated PP filmsDOI : https://doi.org/10.1007/s11998-023-00880-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00880-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41084
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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24737 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |
24688 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |