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Hydrophobically Modification and Characterization of Silica Gel

Authors： LI Da-chuan1，TONG Zhi 2,CHEN Fang-fang2，LI Yu3

Units： 1. Shanxi Modern Architecture Design and Research Institute, Xi’an 710048 China 2. School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710048, China3. China Coal Xi’an Design Engineering Co.Ltd, Xi’an 710045 China

KeyWords： sol-gel; diethoxydimethylsilane (DDS); hydrophobically modification

ClassificationCode：X781.5

year,volume(issue):pagination： 2011,31(5):25-28

Abstract：

Hydrophobic silica gel was prepared by sol-gel process using tetraethoxy silicone(TEOS) as raw material, then the surface was chemically modified by diethoxydimethylsilane(DDS).The structure,hydrophobicity,thermal stability and surface morphology of the silica membrane were characterized by means of IR,angle of contact,TG-DTG and AFM.The results showed that the hydrophobic group—CH3 was on the surface of silica gel modified; the thermal stability was good, there was no significant mass loss after 600℃, sintered temperature set at 400℃，the silica membrane draw hydrophobic; The surface with large-porosity was regularly smooth.

Funds：

陕西省科技厅工业公关项目(2009K06-27)：抗污染型无机陶瓷膜的开发及在MBR中的应用技术研究;西安工程大学创新基金

AuthorIntro：

陈方方（1988-），女，河南省漯河人，在读硕士，主要研究方向：抗污染型无机陶瓷膜的制备。电话：15191845815。邮箱：cff131211@163.com 通讯作者*：同帜（1963-），男，陕西省户县人，西安工程大学高级工程师，E-mail：tongzhi63@Yahoo.com.cn

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