Comparative release rates from controlled release polymer coatings—comparisons between models and experiment / Prakash S. Sane in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 4 (07/2019) . - p. 1193-1200 Titre : Comparative release rates from controlled release polymer coatings—comparisons between models and experiment Type de document : texte imprimé Auteurs : Prakash S. Sane, Auteur ; Kumar Ghosh Swapan, Auteur ; Donald Sundberg, Auteur Année de publication : 2019 Article en page(s) : p. 1193-1200 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Etudes comparatives Revêtements -- Additifs:Peinture -- Additifs Revêtements antisalissures:Peinture antisalissures Revêtements organiques Système de libération contrôlée (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : Controlled release devices and coatings are used heavily in widely varying applications. Here, we focus on applications to antifouling coatings by adding an active agent to polymeric coatings. Quantitative models were developed for four distinctively different methods of dispersing the active agent in the coating. The predicted release rates from these models were contrasted to reveal the inherent differences in the time-dependent release rate profiles achievable from these types of coatings. The majority of these four coatings (monolithic, dispersed particle and reservoir membrane) release the active agent with greatly varying rates over their effective lifetimes, while a microcapsule-based coating has the potential to produce relatively constant rates of release. While the models are potentially of great value, they require a number of parameters, particularly the diffusion coefficient of the active agent through the polymer, to be quantified. We demonstrate how such parameters can be quantified through release rate measurements from simple experimental coatings. Note de contenu : - MODELING FRAMEWORK : Monolithic coatings - Dispersed particle coatings - Reservoir membrane coatings - Microcapsule-based coatings - EXPERIMENTAL WORK : Materials - Emulsion polymerization - Typical paint preparation - Characterization - RESULTS AND DISCUSSION : Comparative release rates from different types of coatings - Experimental release rates DOI : 10.1007/s11998-019-00226-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00226-1.pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32873 [article]

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