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

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

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)208-215
Number of pages8
JournalJournal of Sol-Gel Science and Technology
Volume53
Issue number2
DOIs
Publication statusPublished - 2010 Feb

Fingerprint

Silicon Dioxide
Silica
silicon dioxide
humidity
Atmospheric humidity
Contact angle
Water
Chemical modification
Angle measurement
Light transmission
Temperature
water
Fourier transform infrared spectroscopy
Atomic force microscopy
Aging of materials
infrared spectroscopy
atomic force microscopy
Scanning electron microscopy
scanning electron microscopy
room temperature

Keywords

  • Humidity
  • Hydrophobicity
  • Sliding angle
  • Sol-gel process
  • Wetting phenomena

ASJC Scopus subject areas

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

Cite this

Optically transparent superhydrophobic TEOS-derived silica films by surface silylation method. / Latthe, Sanjay S.; Imai, Hiroaki; Ganesan, V.; Kappenstein, Charles; Rao, A. Venkateswara.

In: Journal of Sol-Gel Science and Technology, Vol. 53, No. 2, 02.2010, p. 208-215.

Research output: Contribution to journalArticle

Latthe, Sanjay S. ; Imai, Hiroaki ; Ganesan, V. ; Kappenstein, Charles ; Rao, A. Venkateswara. / Optically transparent superhydrophobic TEOS-derived silica films by surface silylation method. In: Journal of Sol-Gel Science and Technology. 2010 ; Vol. 53, No. 2. pp. 208-215.
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