Preparation of Hydrophobic Silica Aerogels and Its Application in Cotton Fabrics
The bulk hydrophobic SiO2 aerogels were prepared by sol-gel method and drying under atmospheric pressure using methyl trimethoxysilane as precursors, methanol as solvent, oxalic acid and ammonia as acid-base catalysts.The effect of different conditions on the gel time and density was investigated.The results showed that when the molar ratio of MTMS to methanol was 1∶24 and pH=8, the gel time of SiO2 aerogels was 29h, and the density was 120kg/m3.FTIR and contact angle showed that the surface of the aerogels had a large amount of hydrophobic group methyl, and the contact angle was 151.0 °, which was superhydrophobic.TG showed that: the aerogels has a good heat resistance.SEM showed that the prepared SiO2 aerogels had a three-dimensional network of continuous porous structure, and the particle size was about 2 μm.The contact angle of cotton,which treated by mixture of SiO2 aerogels and Polydimethylsiloxane (PDMS),was 155 °, showing super-hydrophobicity.SEM of cotton fabric showed that a large amount of SiO2 aerogels particles were loaded on the surface of cotton fabric,which were treated by PDMS/SiO2 aerogesl, and the surface roughness was improved.
SiO2aerogels Methyltrimethoxysilane Polydimethylsiloxane Superhydrophobic
ZHANG Xuan-yu XU Li-hui SHEN Yong WANG Li-ming
Shanghai University Of Engineering Science, Dragon Road, ShangHai, 201600, China
国际会议
2017上海纺织服装创意创新研究生学术论坛暨第十一届纺织服装创新国际论坛
上海
英文
261-266
2017-07-01（万方平台首次上网日期，不代表论文的发表时间）