A moisture-absorbing and abrasion-resistant transparent coating on polystyrene / Svenja Grube in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 669-680 Titre : A moisture-absorbing and abrasion-resistant transparent coating on polystyrene Type de document : texte imprimé Auteurs : Svenja Grube, Auteur ; Konstantin Siegmann, Auteur ; Martina Hirayama, Auteur Année de publication : 2015 Article en page(s) : p. 669-680 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Abrasion Gonflement (physique) Humidité -- Absorption Matières plastiques -- Revêtements protecteurs Polystyrène Polyvinylpyrrolidone Résistance à l'abrasion Revêtements antigel Index. décimale : 667.9 Revêtements et enduits Résumé : A common phenomenon concerning cold surfaces which are subjected to a warmer, more humid atmosphere is condensation in the form of water droplets (fogging) or even ice crystals (icing). Thus, a previously transparent object becomes opaque because light is scattered by the droplets or crystals. This may impair the usability of that object. We developed an anti-fogging/icing coating which overcomes the problem of fogging and icing by being able to absorb the condensing water and preventing it from crystallizing. The coating consists of poly(1-vinyl-2-pyrrolidone) (PVP) crosslinked by UV light using hydrogen peroxide (H2O2). Benzophenone (BP) is used to attach PVP to the surface of the polystyrene (PS) substrate. At temperatures as low as -60°C, the PVP coating can absorb up to 70 wt% of water and still inhibit its crystallization. However, at surface temperatures of around -18°C, opacity is only observable at 150 wt% of absorbed water and higher. An increasing coating thickness as well as a decreasing crosslink density improves the anti-fogging/icing effect because the coating can absorb more water. The abrasion resistance of the coating is impaired by a decreasing crosslink density. Note de contenu : - MATERIALS AND METHODS : Coatings process - Characterization of the coatings - RESULTS AND DISCUSSION : Coating mechanism - Absorption and swelling - Non-freezing water - Influence of coating thickness on anti-fog performance under icing conditions occuring in practice - Water absorption and abrasion testing DOI : 10.1007/s11998-015-9678-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9678-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24402 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
17366	-	Périodique	Bibliothèque principale	Documentaires	Disponible

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