Amphiphilic marine coating systems of self-stratified PDMS-PEG surfaces with an epoxy-polyurethane matrix / AliReza Rahimi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 3 (05/2022) . - p. 795-812 Titre : Amphiphilic marine coating systems of self-stratified PDMS-PEG surfaces with an epoxy-polyurethane matrix Type de document : texte imprimé Auteurs : AliReza Rahimi, Auteur ; Morgan Murphy, Auteur ; Kinza Faiyaz, Auteur ; Shane J. Stafslien, Auteur ; Lyndsi J. Vander Wall, Auteur ; Madhura Pade, Auteur ; John A. Finlay, Auteur ; Anthony S. Clare, Auteur ; Dean C. Webster, Auteur Année de publication : 2022 Article en page(s) : p. 795-812 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Carbamate de glycidyle Copolymère silicone-uréthane Epoxydes Essais (technologie) Formulation (Génie chimique) Revêtements antisalissures Revêtements autostratifiants Revêtements organiques Salissures biologiques Statistique Index. décimale : 667.9 Revêtements et enduits Résumé : Marine coatings protect submerged surfaces from the negative effects of biofouling. In this work, we demonstrate a new method to prepare self-stratified, amphiphilic glycidyl-carbamate (GC)-based (epoxy urethane-based) coatings (AmpSiGC coatings) that have fouling-release properties making them suitable for marine use. The prepared coating systems are unique and durable in character as the bulk coating takes advantage of both epoxy and urethane functionalities while the surface is comprised of both hydrophilic and hydrophobic domains, granting it an amphiphilic characteristic. The experimental approach aimed to evaluate several factors that influence coating performance, including molecular weight of poly (ethylene glycol) (PEG) and PDMS moieties, ratio of hydrophobic (PDMS) and hydrophilic (PEG) components in the system, and the effect of different curing agents. The results demonstrated that polymeric chains of 10,000 Mn PDMS and 750 Mn PEG at 10–15 wt.% each offer substantially improved or comparable fouling-release performance in comparison to commercial marine coatings. This paper reports on the facile synthesis and characterization of the GC resin and GC prepolymers using FTIR and epoxy titrations ; surface characterization of the coatings using ATR-FTIR, XPS, and AFM; and fouling-release assessment of the surfaces using laboratory biological assays with the barnacle Amphibalanus amphitrite, the algae Ulva linza and Navicula incerta, and the bacteria Cellulophaga lytica. Several of the AmpSiGC coatings exhibited promising performance, which were better or comparable to the internal and commercial reference coatings. The performance of the systems was dependent on all of the factors considered in this study. Note de contenu : - Materials - Design of experiments - Synthesis of glycidyl-carbamate resin - Synthesis of amphiphilic glycidyl-carbamate prepolymers - Epoxy equivalent weight titrations - Percent solids determination - Fourier transform infrared spectroscopy - Coating formulation and curing - Surface characterization - Biological laboratory assays - Statistical analysis - Table 1 : Coating compositions - Table 2 : Epoxy equivalent weight for GC resin and some prepolymers DOI : https://doi.org/10.1007/s11998-021-00561-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00561-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38072 [article]

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Poly(ethylene) glycol-modified, amphiphilic, siloxane–polyurethane coatings and their performance as fouling-release surfaces / Teluka P. Galhenage 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. 307-322 Titre : Poly(ethylene) glycol-modified, amphiphilic, siloxane–polyurethane coatings and their performance as fouling-release surfaces Type de document : texte imprimé Auteurs : Teluka P. Galhenage, Auteur ; Dean C. Webster, Auteur ; Augusto M. S. Moreira, Auteur ; Ryan J. Burgett, Auteur ; Shane J. Stafslien, Auteur ; Lyndsi J. Vander Wall, Auteur ; John A. Finlay, Auteur ; Sofia C. Franco, Auteur ; Anthony S. Clare, Auteur Année de publication : 2017 Article en page(s) : p. 307-322 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère silicone-uréthane Formulation (Génie chimique) Marines (peinture) Polyéthylène glycol Polyisocyanates Polymères -- Synthèse Polymères amphiphiles Prépolymères Un pré-polymère ou prépolymère est un oligomère ou un polymère présentant des groupes réactifs qui lui permettent de participer à une polymérisation ultérieure et d’incorporer ainsi plusieurs unités monomères dans au moins une chaîne de la macromolécule finale. Les pré-polymères peuvent être di-fonctionnels (c'est le cas des pré-polymères téléchéliques) ou plurifonctionnels. Dans ce dernier cas, ils sont utilisés pour la fabrication de polymères thermodurcissables par réticulation. Revêtements antisalissures:Peinture antisalissures Surfaces -- Analyse Index. décimale : 667.9 Revêtements et enduits Résumé : Amphiphilic siloxane–polyurethane (AmSiPU) coatings were prepared using a series of polyisocyanate prepolymers modified with polydimethyl siloxane (PDMS) and poly(ethylene glycol) (PEG). Fouling-release performance of the AmSiPU coatings was evaluated through laboratory biological assays using several representative marine organisms. First, polyisocyanate prepolymers with compositional variation in PDMS and PEG were synthesized and characterized using Fourier transform infrared spectroscopy (FTIR) and isocyanate titrations. Then, the prepolymers were incorporated into coatings. Surface wettability of the coatings was evaluated using contact angle and surface energy measurements. Coatings’ surfaces were also characterized using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM). ATR-FTIR and XPS experiments revealed that both PDMS and PEG moieties were present on the surface suggesting amphiphilic character. AFM phase images show microphase separation. AmSiPU coatings show excellent fouling-release performance toward bacteria (Cellulophaga lytica), the diatoms (Navicula incerta), and the green algae (Ulva linza), demonstrating comparable or superior performance to many commercial amphiphilic fouling-release coatings. Despite the incorporation of hydrophilic PEG, AmSiPU coatings show good macrofouling release which is often challenging with amphiphilic coating systems. AmSiPU coatings are a nontoxic and tough fouling-release solution with comparable performance to benchmarks in the fouling-release coatings market. Note de contenu : - Materials - Synthesis of prepolymers - Isocyanate titrations - Instrumentation - Coating formulation and curing - Control and standard coatings - Water aging - Biological laboratory - Surface characterization DOI : 10.1007/s11998-016-9862-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9862-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28147 [article]

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