Preparation and Adsorption Property of Phenyltriethoxysilane Modified SiO_2 Aerogel  

作　　者：林本兰 崔升 LIU Xueyong LIU Yu SHEN Xiaodong HAN Guifan 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering,College of Materials Science and Engineering,Nanjing University of Technology [2]Institute of Chemical Materials,The Chinese Academy of Engineering Physics

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第5期916-920,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.10976013);the Science Project of Ministry of Housing and Urban-Rural Development(No.2011-K7-16);the State Key Laboratory of Materials Oriented Chemical Engineering(No.KL11-09)

摘　　要：The hydrophobic silica aerogel （SiO2 aerogel） was prepared by/n situ polymerization sol-gel method and ethanol supercritical drying, with tetraethoxysilane （TEOS） as silica source, phenyltriethoxysilane （PTES） as modifier, ethanol as solvent and ammonia as catalyst. The effects of n（PTES）/n（TOES） were investigated on gel time, structure, and hydrophobicity. The SiO2 aerogel was measured by Fourier transform infrared spectroscopy （FT-IR） and scanning electron microscopy （SEM）. The effects of n（PTES）/n（TOES） were also studied on adsorption property of pentane, hexane, heptane, octane, benzene, toluene, o-xylenc, nitromethane, nitroethane, and nitrobenzene. The adsorption intensity of SiO2 aerogel was compared with that of activated carbon. The results show, with the increasing ofn（PTES）/n（TOES）, the surface area, pore volume, and pore size of SiO2 aerogel decreased, gel time and hydrophobicity increased, and the contact angle could be 154° with n（PTES）/n（TOES）=0.7. The adsorption intensity of SiO2 aerogel with n（PTES）/n（TOES）=0.5 was bigger than that of activated carbon with an average 5.84 times of 10 organic liquid. The adsorption intensity of aerogel with n（PTES）/n（TOES） =0.1 was the best one in all samples with the average 8.33 times compared with that of activated carbon.The hydrophobic silica aerogel （SiO2 aerogel） was prepared by/n situ polymerization sol-gel method and ethanol supercritical drying, with tetraethoxysilane （TEOS） as silica source, phenyltriethoxysilane （PTES） as modifier, ethanol as solvent and ammonia as catalyst. The effects of n（PTES）/n（TOES） were investigated on gel time, structure, and hydrophobicity. The SiO2 aerogel was measured by Fourier transform infrared spectroscopy （FT-IR） and scanning electron microscopy （SEM）. The effects of n（PTES）/n（TOES） were also studied on adsorption property of pentane, hexane, heptane, octane, benzene, toluene, o-xylenc, nitromethane, nitroethane, and nitrobenzene. The adsorption intensity of SiO2 aerogel was compared with that of activated carbon. The results show, with the increasing ofn（PTES）/n（TOES）, the surface area, pore volume, and pore size of SiO2 aerogel decreased, gel time and hydrophobicity increased, and the contact angle could be 154° with n（PTES）/n（TOES）=0.7. The adsorption intensity of SiO2 aerogel with n（PTES）/n（TOES）=0.5 was bigger than that of activated carbon with an average 5.84 times of 10 organic liquid. The adsorption intensity of aerogel with n（PTES）/n（TOES） =0.1 was the best one in all samples with the average 8.33 times compared with that of activated carbon.

关 键 词：silica aerogel HYDROPHOBICITY PTES adsorption intensity activated carbon 

分 类 号：O613.72[理学—无机化学]