Fabrication of superhydrophobic silica-based surfaces with high transmittance by using tetraethoxysilane precursor and different polymeric species

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Title:	Fabrication of superhydrophobic silica-based surfaces with high transmittance by using tetraethoxysilane precursor and different polymeric species
Authors:	Chen,YK;Chang,KC;Wu,KY;Tsai,YL;Lu,JS;Chen,H
Contributors:	化學工程與材料工程學系
Keywords:	SOL-GEL METHOD;HYBRID MATERIALS;POLY(ETHYLENE GLYCOL);POLYETHYLENE-GLYCOL;PHASE-BEHAVIOR;FILMS;POLYPROPYLENEGLYCOL;TRANSPARENT;SYSTEM;PEG
Date:	2009
Issue Date:	2010-06-29 17:26:59 (UTC+8)
Publisher:	中央大學
Abstract:	The preparation of superhydrophobic silica-based surfaces via the sol-gel process through the addition of different polymeric species into the precursor solution was done in this study. The surface roughness of the films was obtained by removing the organic polymer at a high temperature, and then the hydrophobic groups were bonded onto the films with a monolayer by chemical reaction with hexamethyldisilazane (HMDS). The characteristic properties of the as-prepared films were analyzed by contact angle measurements, scanning electron microscopy (SEM), atomic force microscopy (AFM), nitrogen adsorption/desorption, and UV-vis scanning spectrophotometer. The experimental results revealed that the superhydrophobic thin films with high transmittance could easily be prepared using polypropylene (PPG), polyethylene (PEG), and poly(vinylpyrrolidone) (PVP). Surface roughness and pore size were enhanced using PPG polymeric species. The distribution of pore size was from the microporous to the mesoporous and marcoporous regions. In addition, the contact angles of the rough surfaces prepared at 500 degrees C without modification of HMDS were smaller than 58 but larger than 1568 after modified by HMDS. (C) 2009 Elsevier B. V. All rights reserved.
Relation:	APPLIED SURFACE SCIENCE
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] journal & Dissertation

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