Effect of substrate roughness on the contact angle of sputter deposited superhydrophobic polytetrafluoroethylene coatings
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
View Archive Info| Field | Value | |
| Title |
Effect of substrate roughness on the contact angle of sputter deposited superhydrophobic polytetrafluoroethylene coatings
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| Creator |
Selvakumar, N
Barshilia, Harish C Ramesh, M Rajam, KS |
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| Subject |
Inorganic, Organic and Physical Chemistry
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| Description |
A polytetrafluoroethylene (PTFE) superhydrophobic coating was prepared using magnetron sputtering process. The PTFE coating was deposited on sand blasted glass substrates with different substrate roughness (Ra) in the range of 50 - 7000 nm. The PTFE coatings were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, contact angle analyzer and atomic force microscopy techniques. The PTFE coatings deposited on sand blasted glass substrates (Ra = 4500-4800 nm) were found to be superhydrophobic with a static contact angle of 152 and a low contact angle hysteresis (2). In order to investigate the influence of substrate roughness on the wetting properties, we have carried out a quantitative study of effect of substrate roughness on contact angle and surface free energy (SFE) of sputter deposited PTFE coatings.
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| Publisher |
VALARDOCS
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| Contributor |
Sudharsan, T.S.
Kamachi, Mudali Baldev, Raj |
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| Date |
2010
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| Type |
Conference or Workshop Item
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://nal-ir.nal.res.in/9689/1/SMT%2DPTFE.pdf
Selvakumar, N and Barshilia, Harish C and Ramesh, M and Rajam, KS (2010) Effect of substrate roughness on the contact angle of sputter deposited superhydrophobic polytetrafluoroethylene coatings. In: 23rd International Conference on Surface Modification Technologies (SMT 23), 2-5 Nov 2009, Mamallapuram. |
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| Relation |
http://nal-ir.nal.res.in/9689/
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