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Polymers and Polymer Composites

PREPARATION AND CHARACTERIZATION OF SILICA/POLYMER ANTIFOGGING COATINGS

January 1, 2014 By: Chao-Chin Chang; Kuan-Chung Wang; Ching-Chung Chen; Liao-Ping Cheng Research article

Title: PREPARATION AND CHARACTERIZATION OF SILICA/POLYMER ANTIFOGGING COATINGS
Page Range: p.39-44
Author(s): Chao-Chin Chang; Kuan-Chung Wang; Ching-Chung Chen; Liao-Ping Cheng
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 22
Issue No: No.1

Abstract
This research work concerns the preparation of a bi-layer antifogging (AF) coating on a polycarbonate plastic substrate. The bottom layer, serving as a mechanical support, is an organic-inorganic composite that is formed by embedding colloidal silica in a crosslinked network of b-glycidoxypropyltrimethoxysiline. Atop this layer, a coating formulation incorporating glycidyl methacrylate and poly(ethylene oxide)-based hydrophilic species was applied and then UV-cured to yield a film exhibiting the AF effect. Solid-state 29Si-NMR and FTIR were employed to investigate the evolution of chemical bonds during the sol-gel and the UV-curing processes. Contact angles of water on the coatings were measured to examine the hydrophilicity of the coatings. Furthermore, industrial tests such as pencil hardness, tape adhesion, and steam tests were carried out to evaluate the performance of the coatings. 21 Refs.

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