Effect of acrylation on the properties of waterborne epoxy : evaluation of physicochemical, thermal, mechanical and morphological properties / Sukanya Pradhan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 3 (05/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 3 (05/2018) . - p. 515-526 Titre : Effect of acrylation on the properties of waterborne epoxy : evaluation of physicochemical, thermal, mechanical and morphological properties Type de document : texte imprimé Auteurs : Sukanya Pradhan, Auteur ; Smita Mohanty, Auteur ; Sanjay K. Nayak, Auteur Année de publication : 2018 Article en page(s) : p. 515-526 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Calorimétrie Copolymère époxy acrylate Copolymères -- Synthèse Formulation (Génie chimique) Fourier, Spectroscopie infrarouge à transformée de Morphologie (matériaux) Résonance magnétique nucléaire Revêtements -- Analyse Revêtements en phase aqueuse Thermogravimétrie Index. décimale : 667.9 Revêtements et enduits Résumé : The present work addresses the critical requirements for the coating industry such as developing the sustainability of biobased materials and simultaneously achieving a balanced combination of coating properties. In this study, acrylated epoxidized soybean oil (AESO) has been successfully synthesized from epoxidized soybean oil and acrylic acid. Subsequently, AESO was modified using a biobased long chain diacid (Pripol-1009) with the assistance of a water/ethanol blend to form waterborne epoxy acrylate (WBEA). The properties of the cured WBEA with 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane as initiator were studied through spectral analysis, coating properties evaluation, corrosion resistance, and morphological and thermal analysis. The results revealed that WBEA exhibited relatively better mechanical, thermal and corrosion resistance characteristics over cured waterborne epoxy. Keywords Waterborne Acrylate Epoxy Pripol-1009 Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of waterborne epoxy (WBE) - Synthesis of waterborne epoxy acrylate (WBEA) - Formulation of coatings - CHARACTERIZATION : Physicochemical characteristics - Spectral analysis - Swelling and crosslink density study - Coating properties - Morphological analysis - RESULTS AND DISCUSSION : Physicochemical characteristics - Proton NMR analysis - Differential scanning calorimetry analysis - Fourier transform infrared spectroscopic (FTIR) analysis - Swelling and crosslink density study - Coatings properties - Corrosion resistance - Morphological analysis - Thermogravimetric analysis DOI : 10.1007/s11998-018-0006-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0006-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30748 [article]

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A review on protective polymeric coatings for marine applications / Shatakshi Verma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 2 (03/2019) . - p. 307-338 Titre : A review on protective polymeric coatings for marine applications Type de document : texte imprimé Auteurs : Shatakshi Verma, Auteur ; Smita Mohanty, Auteur ; Sanjay K. Nayak, Auteur Année de publication : 2019 Article en page(s) : p. 307-338 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Epoxydes Marines (peinture) Polydiméthylsiloxane Le polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones. Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone. Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK). La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones. Revêtements antisalissures:Peinture antisalissures Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : The main objective of this review is to discuss the recent research on polymer-based surface coatings contributing to the protection against marine biofouling based on the knowledge available in literature, supplemented by means of figures, mechanism illustrations, mathematical models, and equations. A need for studies on the mathematical behavior of such coatings is emphasized, composed of quantitative evaluation of foul-release performance of coatings using mathematical equations of the concerned parameters. Apart from the synthesis of protective polymeric coatings, understanding the relationship between characteristics of coating materials and accompanying foul-release and antifouling mechanism is important. In this regard, efforts have been made to equally evaluate, simulate, and measure the appropriate performance of the coatings. By examining the physicochemical and mechanical properties of the polymers, adhesion behavior has been found to be one of the prerequisites for the success of polymeric coatings for marine applications. The potential development of a broad spectrum of methods used to evaluate the foul-release performance of polymeric coatings depending on adhesion behavior of fouling organisms with the coatings has been discussed. From the analysis of the factors affecting degradation of coatings, environmental interference is declared a key factor for complete degradation of polymeric coatings. This review opens up new research directions to improve the adhesion performance of polymeric coatings for ship hulls designed with tunable viscoelasticity by the incorporation of elastomeric polymers (like polydimethylsiloxane) into stiff polymers (like epoxy resins) with and without the utilization of additives, modifiers, and nano-fillers. In addition, it provides methods to improve the foul-release performance of such coatings that work on adhesion behavior of biofouling species attached to the coating surface. Note de contenu : - POLYMERIC COATINGS FOR MARINE APPLICATIONS : Superhydrophic coatings - Antifouling coatings - Foul-release coatings - NONFOULING TECHNOLOGY BASED ON (EPOXY RESINS-PDMS) Hybrids : Nonfouling (epoxy resin-PDMS)-unfilled coating systems - ROLE OF FILLERS AND ADDITIVES IN PDMS-BASED COATINGS : Mathematical evaluation of foul-release performance DOI : 10.1007/s11998-018-00174-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00174-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32406 [article]

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Synthesis and characterization of waterborne epoxy derived from epoxidized soybean oil and bioderived C-36 dicarboxylic acid / Sukanya Pradhan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 4 (07/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 4 (07/2017) . - p. 915-926 Titre : Synthesis and characterization of waterborne epoxy derived from epoxidized soybean oil and bioderived C-36 dicarboxylic acid Type de document : texte imprimé Auteurs : Sukanya Pradhan, Auteur ; Priyanka Pandey, Auteur ; Smita Mohanty, Auteur ; Sanjay K. Nayak, Auteur Année de publication : 2017 Article en page(s) : p. 915-926 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux Caractérisation Dimère, Acide Epoxydes Polymères -- Synthèse Polymères en émulsion Index. décimale : 667.9 Revêtements et enduits Résumé : This study focuses on synthesis of waterborne epoxy (WBE) derived from epoxidized soybean oil (ESO) and its compatibility with water-dispersible curing agent Pripol 1009, which is a bioderived long-chain dimer acid. The reaction parameters involved in the synthesis of WBE from ESO have been optimized based on physicochemical properties like hydroxyl value, epoxy equivalent value and degree of solubility of WBE. The WBE obtained after 5 and 6 h of reaction time was found to be of optimum composition with balanced physicochemical properties. The mechanical, thermal and physicochemical properties of WBE obtained after 6 h of reaction time revealed relatively better performance characteristics as compared to ESO. Note de contenu : - EXPERIMENTAL : Materials and methods - Synthesis of waterborne epoxy (WBE) - Preparation of cured ESO and WBE - CHARACTERIZATION : Solubility test - Particle size analysis - Storage stability - Solid content - Spectral analysis - Chemical resistance - Water uptake - Swelling and crosslink density determination - Mechanical analysis - Differential scanning calorimetry analysis - RESULTS AND DISCUSSION : Physicochemical analysis of WBE - Fourier transform infrared spectroscopic (FTIR) analysis - Proton NMR analysis - Mechanical analysis - Differential scanning calorimetry (DSC) analysis - Chemicals resistance - Swelling and crosslink densigy - Water uptake DOI : 10.1007/s11998-016-9884-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9884-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28933 [article]

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Synthesis and properties of castor oil-based waterborne polyurethane cloisite 30B nanocomposite coatings / Siva Sankar Pandar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 2 (03/2017) . - p. 377-394 Titre : Synthesis and properties of castor oil-based waterborne polyurethane cloisite 30B nanocomposite coatings Type de document : texte imprimé Auteurs : Siva Sankar Pandar, Auteur ; Bishnu Prasad Panda, Auteur ; Smita Mohanty, Auteur ; Sanjay K. Nayak, Auteur Année de publication : 2017 Article en page(s) : p. 377-394 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cloisite Huile de ricin et constituants Morphologie (matériaux) Polymères en émulsion Polyuréthanes Revêtements -- Analyse:Peinture -- Analyse Revêtements -- Propriétés thermiques:Peinture -- Propriétés thermiques Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Waterborne polyurethane dispersions (WPUDs) were synthesized successfully from castor oil-based polyol, isophorone diisocyanate and dimethylol propionic acid with NCO/OH ratio of 1.5. Different weight percentages of cloisite 30B (1, 2, and 3 wt%) were loaded with WPUDs to prepare nanocomposite films. Prepared prepolymer and nanocomposite films were characterized using FTIR, XRD, SEM, TEM, DSC, and TGA techniques, and coating properties, such as pencil hardness, abrasion resistance, impact resistance, and contact angle, were evaluated. The results obtained from different amounts of clay loading were compared with the pristine castor oil-based WPUDs. The FTIR spectra deconvolution technique was used to study the hydrogen bonding effect within the polymer with an increase in clay content. TGA analysis showed that the thermal stability of WPUDs increases with cloisite 30B (C30B) content. The surface morphology and hydrophilicity/hydrophobicity nature of the nanocomposite films were characterized using scanning electron microscopy and contact angle measurement. The results obtained from tensile tests indicated that the mechanical property of the dispersion system improved with C30B content. A high-performance castor oil-based nanocomposite coating with low volatile organic component can be targeted as an outcome of this work. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of CO-based PU-C30B waterborne nanocomposite film - Preparation of nanocomposite films - Instrument characterization - RESULTS AND DISCUSSION : FTIR analysis - Characterization of hydrogen bonding via FTIR - Morphological studies - Mechanical properties DOI : 10.1007/s11998-016-9855-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9855-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28153 [article]

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