Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 64, Issue 3, Pages 743-749Publisher
SPRINGER
DOI: 10.1007/s10971-012-2911-7
Keywords
Hybrid silica sol; Oil repellent; Silica coupling agent; Contact angle; Natural substance
Categories
Funding
- National Natural Science Foundation of China [21174055]
- 333 Talent Project Foundation of Jiangsu Province [BRA2011184]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Business Doctoral Innovation Project of Jiangsu Province in China [BK2009672]
- Graduate Students Innovation Project of Jiangsu Province in China [CX08S_016Z]
- Fundamental Research Funds for the Central Universities [JUDCF09004]
- Excellent Doctoral Cultivation Project of Jiangnan University
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This study concerns the organic-inorganic hybrid coating of silica sol based on dyed cotton, silk and wool fabrics in order to increase the repellence to capsicum oil via adding methyltriethoxysilane, octyltriethoxysilane, hexadec-ltrimethoxysilane or tridecafluorooctyltriethoxysilane (FAS) in the inorganic silica sol. The dyed cotton fabric treated with hybrid silica sol doped with FAS (F-silica sol, FAS 4 %) presents oil-repellent capability, and the contact angles of capsicum oil on the treated cotton, silk and wool fabrics are 98.5A degrees, 111.59A degrees and 122.15A degrees, respectively. A high FAS concentration (20 %) can improve the oil-repellent ability to 5 grades comparing to the untreated fabrics. The color strengths (K/S) of the coated fabrics change slightly, while the maximum absorption wavelengths of the coated fabrics are the same as the untreated fabrics. Although the drape coefficient of cotton fabric is increased to 54 % from 39 % after coated with F-silica sol, the effect is not significant. Compared to the weight gain rate of untreated cotton, silk and wool samples (1.89, 1.23 and 2.38 %), the weight gain rate of the cotton, silk and wool samples coated with F-silica sol are 6.99, 4.76 and 7.69 %, respectively. The calculated sol-gel weight gains (5.10, 3.53 and 5.31 %) of coated fabrics indicate that the silica coating is subsistent on the fiber surfaces.
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