Journal
SURFACE INNOVATIONS
Volume 1, Issue 3, Pages 157-161Publisher
ICE PUBLISHING
DOI: 10.1680/si.13.00007
Keywords
dip coating; porous; silica; sol-gel; water repellent; wettability
Funding
- Council of Scientific and Industrial Research-Human Resource Development Group (CSIR-HRDG), New Delhi, Government of India [09/816(0036)/2012-EMR-I]
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Surface wettability, as one of the most crucial properties of solid surface, is a very common interface phenomenon in our daily life and nature. The authors obtained water-repellent porous silica microbowl-like structure by controlled sol-gel method with tetraethaoxysilane (TEOS) as a precursor and 3,3,3-trifluropropyltrimethoxysilane (TFPTMOS) as a coprecursor. The water-repellent properties of the coatings were raised with increasing molar ratio (M) of TFPTMOS/TEOS. The prepared silica coatings showed water-repellent behavior with water contact angle of 136 +/- 3 degrees and sliding angle of 18 +/- 1 degrees without any posthydrophobization. In conclusion, the wetting properties were dependent on the micro-/nano-structure and the chemical composition of the coatings.
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