Journal
APPLIED SURFACE SCIENCE
Volume 257, Issue 13, Pages 5491-5498Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2010.12.116
Keywords
Superhydrophobicity; Silica hydrosol; Cotton fabrics; Hydrophobization; Sol-gel reaction
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Funding
- Chinese Ministry of Education [109066]
- Science and Technology Commission of Shanghai Municipality [0852nm00300]
- Innovation Foundation for Ph.D. Candidate of Donghua University (DHU) [9D10522]
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Superhydrophobic cotton fabrics were prepared by the incorporation of silica nanoparticles and subsequent hydrophobization with hexadecyltrimethoxysilane (HDTMS). The silica nanoparticles were synthesized via sol-gel reaction with methyl trimethoxy silane (MTMS) as the precursor in the presence of the base catalyst and surfactant in aqueous solution. As for the resulting products, characterization by particle size analyzer, scanning electron microscopy (SEM), scanning probe microscopy (SPM), X-ray photoelectron spectroscopy (XPS), and thermal gravimetric analysis (TGA) were performed respectively. The size of SiO2 nanoparticles can be controlled by adjusting the catalyst and surfactant concentrations. The wettability of cotton textiles was evaluated by the water contact angle (WCA) and water shedding angle (WSA) measurements. The results showed that the treated cotton sample displayed remarkable water repellency with a WCAof 151.9 degrees for a 5 mu L water droplet and a WSA of 13 degrees for a 15 mu L water droplet. (C) 2011 Published by Elsevier B.V.
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