Preparation and Adsorption Property of Phenyltriethoxysilane Modified SiO2 Aerogel
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2013年第5期
论文作者：林本兰 崔升 LIU Xueyong LIU Yu SHEN Xiaodong HAN Guifan
文章页码：916 - 920
摘 要：The hydrophobic silica aerogel（SiO2 aerogel） was prepared by in 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-xylene,nitromethane,nitroethane,and nitrobenzene.The adsorption intensity of SiO2 aerogel was compared with that of activated carbon.The results show,with the increasing of n（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.
林本兰1，崔升1，LIU Xueyong2，LIU Yu2，SHEN Xiaodong1，HAN Guifan1
1. State Key Laboratory of Materials-Oriented Chemical Engineering,College of Materials Science and Engineering,Nanjing University of Technology2. Institute of Chemical Materials,The Chinese Academy of Engineering Physics
摘 要：The hydrophobic silica aerogel（SiO2 aerogel） was prepared by in 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-xylene,nitromethane,nitroethane,and nitrobenzene.The adsorption intensity of SiO2 aerogel was compared with that of activated carbon.The results show,with the increasing of n（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.
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