| 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 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 669-680
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