Optically transparent superhydrophobic TEOS-derived silica films by surface silylation method

Sanjay S. Latthe; Hiroaki Imai; V. Ganesan; Charles Kappenstein; A. Venkateswara Rao

doi:10.1007/s10971-009-2079-y

Optically transparent superhydrophobic TEOS-derived silica films by surface silylation method

Sanjay S. Latthe, Hiroaki Imai, V. Ganesan, Charles Kappenstein, A. Venkateswara Rao

Department of Applied Chemistry

Research output: Contribution to journal › Article

49 Citations (Scopus)

Abstract

Optically transparent silica films were prepared at room temperature (̃27°C) by keeping the molar ratio of TEOS:MeOH:H₂O (0.001 M NH₄F) constant at 1:19.29: 6.20, respectively. A surface chemical modification of the films was done with alkylchlorosilanes at different concentrations from 0 to 1 vol. % and aging times varied from half to 2 h. The DMCS and TMCS surface modified silica films showed the static water contact angle of 146° and 162°, respectively. When the DMCS and TMCS modified films were cured at temperatures higher than 240 and 275°C, respectively, the films became superhydrophilic. Further, the humidity study was carried out at a relative humidity of 90% at 30°C temperature over 60 days. We characterized the water repellent silica films by Fourier transform infrared spectroscopy, scanning electron microscopy, atomic force microscopy, % of optical transmission, humidity tests and contact angle measurements.

Original language	English
Pages (from-to)	208-215
Number of pages	8
Journal	Journal of Sol-Gel Science and Technology
Volume	53
Issue number	2
DOIs	https://doi.org/10.1007/s10971-009-2079-y
Publication status	Published - 2010 Feb 1

Keywords

Humidity
Hydrophobicity
Sliding angle
Sol-gel process
Wetting phenomena

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Chemistry(all)
Biomaterials
Condensed Matter Physics
Materials Chemistry

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Latthe, S. S., Imai, H., Ganesan, V., Kappenstein, C., & Rao, A. V. (2010). Optically transparent superhydrophobic TEOS-derived silica films by surface silylation method. Journal of Sol-Gel Science and Technology, 53(2), 208-215. https://doi.org/10.1007/s10971-009-2079-y

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AU - Latthe, Sanjay S.

AU - Imai, Hiroaki

AU - Ganesan, V.

AU - Kappenstein, Charles

AU - Rao, A. Venkateswara

PY - 2010/2/1

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