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 | |
| Publication status | Published - 2010 Feb |
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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 journal › Article
}
TY - JOUR
T1 - Optically transparent superhydrophobic TEOS-derived silica films by surface silylation method
AU - Latthe, Sanjay S.
AU - Imai, Hiroaki
AU - Ganesan, V.
AU - Kappenstein, Charles
AU - Rao, A. Venkateswara
PY - 2010/2
Y1 - 2010/2
N2 - 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.
AB - 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.
KW - Humidity
KW - Hydrophobicity
KW - Sliding angle
KW - Sol-gel process
KW - Wetting phenomena
UR - http://www.scopus.com/inward/record.url?scp=77951665723&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77951665723&partnerID=8YFLogxK
U2 - 10.1007/s10971-009-2079-y
DO - 10.1007/s10971-009-2079-y
M3 - Article
AN - SCOPUS:77951665723
VL - 53
SP - 208
EP - 215
JO - Journal of Sol-Gel Science and Technology
JF - Journal of Sol-Gel Science and Technology
SN - 0928-0707
IS - 2
ER -