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Sustainable cardanol-based multifunctional carboxyl curing agents for epoxy coatings: Si–S synergism / Kunal Wazarkar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
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Titre : Sustainable cardanol-based multifunctional carboxyl curing agents for epoxy coatings: Si–S synergism Type de document : texte imprimé Auteurs : Kunal Wazarkar, Auteur ; Anagha Sabnis, Auteur Année de publication : 2020 Article en page(s) : p. 1217–1230 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Cardanol
Composés inorganiques -- Synthèse
Epoxydes
Formulation (Génie chimique)
Hydrophobie
Réticulants
Revêtements organiques
Silicium
SynergieIndex. décimale : 667.9 Revêtements et enduits Résumé : High-performance epoxy coatings were prepared by crosslinking commercial diglycidyl ether of bisphenol-A with silicon–sulfur containing di- and tetra-functional carboxyl curing agents based on cardanol. The curing agents were synthesized and products were analyzed by chemical, spectroscopic, and chromatographic techniques. In the next part, coatings were formulated by varying the ratio of epoxy resin to curing agents on equivalent basis, such as 1:0.6, 1:0.8, and 1:1. The coatings were applied on mild steel panels and cured at 150°C for 30 min. The resultant coatings were evaluated for performance properties including mechanical, chemical, optical, thermal anticorrosive, and flame retardant properties. It was observed that with an increase in concentration of silicon–sulfur containing curing agents, water contact angles of the coatings substantially increased. Moreover, electrochemical impedance spectroscopy, Tafel analysis, and salt spray studies revealed that anticorrosive properties of the coatings improved with an increase in concentration of silicon and sulfur. In spite of synergistic effect of silicon–sulfur, only marginal improvement in flame retardant properties was observed. Note de contenu : - EXPERIMENTAL : Synthesis of silicon containing dimer of cardanol (SIL) - Synthesis of Si–S containing multifunctional carboxyl curing agents - Formulation of coatings - Characterization - Instrumentation
- RESULTS AND DICUSSION : FTIR spectroscopy - 1H-NMR spectroscopy - Gel permeation chromatography - Coating propertiesDOI : https://doi.org/10.1007/s11998-020-00341-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00341-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34568
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 5 (09/2020) . - p. 1217–1230[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22303 - Périodique Bibliothèque principale Documentaires Disponible Sustainable microcapsules for self-healing and corrosion protection in powder coatings / Vimal Saimi in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4661 (05/2020)
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Titre : Sustainable microcapsules for self-healing and corrosion protection in powder coatings Type de document : texte imprimé Auteurs : Vimal Saimi, Auteur Année de publication : 2020 Article en page(s) : p. 44-47 Note générale : Bibliogr. Langues : Anglais (eng) 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
Copolymère mélamine-formaldéhyde
Eau salée
Encapsulation
Huile de linL'huile de lin ou "huile de graines de lin" est une huile de couleur jaune d'or, tirée des graines mûres du lin cultivé, pressées à froid et/ou à chaud ; parfois elle est extraite par un solvant, en vue de l'usage industriel ou artistique, principalement comme siccatif, ou huile auto-siccative.
Les utilisations de l'huile de lin dérivent de sa richesse en acides gras polyinsaturés, en particulier en acides linolénique et linoléique, qui lui doivent leur nom.
L'huile de lin polymérise spontanément à l'air, avec une réaction exothermique : un chiffon imbibé d'huile peut ainsi, dans certaines conditions, s'enflammer spontanément.
Pour ses propriétés de polymère, l'huile de lin est employée seule, ou mélangée à d'autres huiles, résines et solvants, et est utilisée en tant que : Imprégnateur et protecteur des bois à l'intérieur comme à l'extérieur : protection contre l'humidité, les champignons et insectes, et contre la poussière par son caractère antistatique, composant de certains vernis de finition, liant de broyage pour la peinture à l'huile, agent plastifiant du mastic de vitrier, agent durcisseur de diverses préparations, agent de cohérence et liant dans la fabrication du linoléum.
Métaux -- Revêtements protecteurs
Microcapsules
Pulvérisation électrostatique
Revêtement autoréparant
Revêtements poudre
Stabilité thermique
Test d'immersion
ThermoplastiquesUne matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire.Index. décimale : 667.9 Revêtements et enduits Résumé : In this work, a self-healing powder coating based on micro-encapsulated linseed oil is reported. Linseed oil was chosen as the self-healing agent for its excellent film forming capability and Poly (melamine formaldehyde) (PMF) was chosen as a shell material. Microcapsules were synthesised by in-situ polymerisation. A powder coating based on thermoplastic powder was used. Microcapsules were mixed with the powder coating and sprayed electrostatically on the cold rolled steel. The thermal stability of microcapsules was evaluated with TGA. The corrosion evaluation of the coating was done with the electrochemical impedance spectroscopy (FIS) and salt water immersion tests. The experimental results have demonstrated a strong inhibition of corrosion in the micro-encapsulated system. Furthermore, impedance measurements has shown an increase of impedance modulus of the micro-encapsulated system during immersion in the corrosive medium, which is reiated to the suppression of active corrosion activities and healing of the scratched areas. Healing of the coating was also demonstrated by optical microscopy. This study successfully demonstrated the self-healing activity of micro-encapsulated linseed oil in protecting steel surfaces against corrosion in powder coatings. Note de contenu : - EXPERIMENT : Materials - Synthesis of microcapsules - Characterisation of microcapsules - Preparation of samples - Characterisation of coated samples Electrochemical Impedance Spectroscopy (EIS) - Salt water immersion tests
- RESULTS AND DISCUSSIONS : Thermal stability of microcapsules - SEM morphology of microcapsules - electrochemical impedance spectroscopy
- Fig. 1 : Synthesis process of the microcapsules prepared by the in-situ polymerisation method
- Fig. 2 : FTIR spectra of linseed oit (L0), MF shetland microcapsules
- Fig. 3 : TGA curve of LO, microcapsules, MF sheti
- Fig. 4 : TGA isothermal curves of microcapsutes ptotted versus the temperature profile (25 to 200°C at 10°C min-'), held at 160°C for 10min
- Fig. 5 : SEM morphology of microcapsutes (a) after synthesis (b) held at 160°C for 10min (c) shell thickness
- Fig. 6 : (a) Distribution of microcapsules in the powder coating (b) close up of microcapsules (C) microcapsutes heated
- Fig. 7 : Bode magnitude plots of the immersed powder coating semples in 3.5% NaCl solution aqueous solution at different exposure times
- Fig. 8 : Salt immersion test after 168hr of exposure (ai blank (b] coating with microcapsulesEn ligne : https://drive.google.com/file/d/1Z4y4aYX3v60E6AgFENVOlmDYor8O13pv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34251
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 210, N° 4661 (05/2020) . - p. 44-47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21744 - Périodique Bibliothèque principale Documentaires Disponible Sustainable steel bridge maintenance in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 8 (08/2017)
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Titre : Sustainable steel bridge maintenance : The role of paint in a life-cycle assessment Type de document : texte imprimé Année de publication : 2017 Article en page(s) : p. 38-48 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
Durée de vie (Ingénierie)
Environnement -- Etudes d'impact
Ponts -- entretien et réparations
Ponts métalliques -- Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Coating manufacturers have long contended that the extended maintenance intervals made possible by the use of high-performance, highly durable coating systems, far outweigh their initial contribution to the eco-footprint of a structure when the benefit that accrues from the use of coatings is taken into account over the whole of its life. The authors discuss a study to test this contention, quantifying the effect of coating systems of varying durability (and hence varying maintenance requirements) on the environmental impact of a steel bridge over the course of its functional life. Note de contenu : - LEGISLATIVE BACKGROUND TO SUSTAINABILITY WITHIN THE E.U. : CEPE support for life-cycle assessment - Output data from the eco footprint tool
- THE EFFECT OF PROTECTIVE COATINGS ON SUSTAINABILITY OF STEEL BRIDGES : Scope of the study : Project design parameters - Life-cycle assessment methodology - Life-cycle scenarios
- LIFE-CYCLE ASSESSMENT RESULTS : Scenario 1 : Full life-cycle assessment - Scenario 2 : Bridge maintenance only - Scenario 3 : Coating processes only
- TABLES : 1. Example Output from Eco Footprint Tool - 2. Stages for the Full LCA for a Coated Steel Bridge - 3. Coating System Compositions and Estimated Intervals - 4. Assumptions Included in the Calculations of Bridge Maintenance LCA Values - 5. The Main Influence Factors in Environmental Performance
- FIGURES : 1. Input data utilized by the Eco-Footprint Tool - 2. GWP Results for the full life cycle over the bridge life of 100 years - 3. GWP Results for bridge maintenance over its 100-year life - 4. GWP results for bridge maintenance coatings assessed at each application over the 100-year life of the bridge - 5. LCA results showing the contribution of each coat to the total GWP of a bridge over its 100-year life cycleEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6104 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29166
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 34, N° 8 (08/2017) . - p. 38-48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19078 - Périodique Bibliothèque principale Documentaires Disponible Synergistic effect of Ag and ZnO nanoparticles on polyaniline incorporated epoxy/2pack coatings for splash zone applications / Mohammad Asif Alam in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)
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Titre : Synergistic effect of Ag and ZnO nanoparticles on polyaniline incorporated epoxy/2pack coatings for splash zone applications Type de document : texte imprimé Auteurs : Mohammad Asif Alam, Auteur ; Ubair Abdus Samad, Auteur ; El-Sayed M. sherif, Auteur ; Asiful Seikh, Auteur ; Saeed M. Al-Zahrani, Auteur ; Nabeel H. Alharthi, Auteur ; Manawwar Alam, Auteur Année de publication : 2019 Article en page(s) : p. 835-845 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Argent
Epoxydes
Essai de dureté
Nanoindentation
Oxyde de zinc
Résistance à l'abrasion
Revêtements -- Propriétés mécaniques
Revêtements bi-composant:Peinture bi-composant
Revêtements organiques
Surfaces (Physique)Index. décimale : 667.9 Revêtements et enduits Résumé : In this work, epoxy/2pack coatings containing polyaniline (PANI) in combination with Ag and ZnO nanoparticles have been synthesized. The nanoparticles were incorporated with bisphenol-A diglycidyl ether epoxy resin and polyamino-amide. The mechanical properties of the fabricated coatings, such as the pendulum hardness, scratch resistance, and impact strength, were studied. The composition of the fabricated coatings was confirmed by attenuated total reflectance infrared spectroscopy measurements. The thermal degradation and indentations were characterized through the use of differential scanning calorimetry and nano-indentation techniques, respectively. The surface morphology of the fabricated coatings was characterized using field-emission scanning electron microscopy. The synergistic effects of the Ag and ZnO nanoparticles on the corrosion resistance of the coatings after different exposure periods in 3.5% NaCl solutions were determined by electrochemical impedance spectroscopy. All the results were consistent with one another and confirmed that the addition of Ag and ZnO nanoparticles improved the mechanical properties of the coatings. This effect also led to a notable increase in the corrosion resistance of the PANI coatings. Note de contenu : - ATR-IR measurement
- FE-SEM investigations
- Nano-indentation analysis
- Electrochemical impedance spectroscopy (EIS)DOI : 10.1007/s11998-018-00156-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00156-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32595
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 3 (05/2019) . - p. 835-845[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20953 - Périodique Bibliothèque principale Documentaires Disponible Synthesis, analysis, and application of lactide-based polyester as coating with improved mechanical and rheological behavior / Rushikesh S. Chanpurkar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
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Titre : Synthesis, analysis, and application of lactide-based polyester as coating with improved mechanical and rheological behavior Type de document : texte imprimé Auteurs : Rushikesh S. Chanpurkar, Auteur ; Gajanan P. Lakhawat, Auteur ; Ruta D. Khonde, Auteur Année de publication : 2021 Article en page(s) : p. 1659-1668 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Anticorrosifs
Anticorrosion
Biomatériaux
Caractérisation
Essais de brouillard salin
LactideLe lactide est le diester cyclique de l’acide lactique et le monomère qui permet de synthétiser le PLA (Poly Lactique Acide) par polymérisation d’ouverture de cycle (ROP).
Issu de l’acide lactique (ou acide 2-hydroxypropanoïque) et produit par fermentation du saccharose ou du glucose, le lactide est d’origine naturelle et renouvelable. Ce produit s’inscrit parfaitement dans le cadre du développement de la chimie verte. Le lactide, étant issu de l’acide lactique qui possède 2 formes stéréo-isomériques (acide lactique L(+) et acide lactique D(-)),existe sous 3 formes stéréo-isomériques : la forme L-lactide, la forme D-lactide et la forme Méso-lactide.
Métaux -- Revêtements protecteurs
Polycondensation
Polyesters
Polymères -- Synthèse
Revêtements -- Propriétés mécaniques
Revêtements organiques
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : Lactide-based polyester resin was synthesized from diethylene glycol and phthalic anhydride with 20, 30, and 40% lactide compositions. The lactide was prepared from lactic acid and the polyester resin was functionalized with carbon–carbon crosslinking by polycondensation reaction. The purpose of this investigation was to enhance the properties such as thermal, mechanical, and rheological behavior of polyester resin synthesized using lactide. The resin was also characterized for acid values, hydroxyl values, and bio-based content. The bio-based content varied from 76 to 92% for variable composition of lactide in the resin. Acid value confirmed the formation of polyester resin and the hydroxyl value indicated the occurrence of crosslinking. The flow viscosity is an important characteristic of resins that are intended to be used as matrix in composite applications, and it was measured at different stress levels at varied temperatures. The performance of a mild steel specimen coated with the synthesized polyester was evaluated for mechanical properties such as tensile strength, impact resistance, flexibility, scratch resistance, and adhesion test. It revealed that lactide-based polyester resin had better mechanical, rheological, and anticorrosive properties than simple polyester resins. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of lactide - Preparation of lactide-based polyester
- CHARACTERISATION : FTIR analysis - Acid value - Hydroxyl value - Bio-based content - Viscosity measurement - Mechanical analysis
- RESULTS AND DISCUSSION : FTIR analysis - Acid value and hydroxyl value - Bio-based content - Rheological analysis - Mechanical analysis - Adhesion strength - Salt spray test
- Table 1 : Rheological properties of lactide-based polyester
- Table 2 : Mechanical properties of lactide-based coatingDOI : https://doi.org/10.1007/s11998-021-00525-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00525-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36823
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and characterization of bio-based benzoxazine oligomer from cardanol for corrosion resistance application / Deepak M. Patil in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 3 (05/2017)
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