TY - JOUR
T1 - Preparation and adsorption property of hydrophobic SiO 2 aerogels modified by methyl triethoxysilane
AU - Cui, Sheng
AU - Lin, Benlan
AU - Liu, Yu
AU - Shen, Xiaodong
AU - Liu, Xueyong
AU - Han, Guifan
PY - 2011/12
Y1 - 2011/12
N2 - The hydrophobic SiO 2 aerogels were prepared by in-situ polymerization sol-gel method and supercritical drying of ethanol method with tetraethylorthosilicate(TEOS) as silica source, methyl triethoxysilane (MTMS) as modifier, ethanol as solvent. Moreover, the structure and adsorption property of SiO 2 aerogels were also studied. As results, the surface area of SiO 2 aerogels was 863.59 m 2/g, the pore volume was 3.57 cm 3/g, and the contact angle was 150°. Adsorption intensity of silica aerogels for organic liquid (alkanes, benzene compounds, and nitro-compounds) is bigger than that of activated carbon. The mass of the liquid absorbed increased linearly with the surface tension of the liquid. The lower surface tension and boiling point are, the shorter desorption time is. After regenerating 10 times, nitromethane regeneration rate remain the same, and almost more than 94%. So SiO 2 aerogels have good absorption and regeneration property.
AB - The hydrophobic SiO 2 aerogels were prepared by in-situ polymerization sol-gel method and supercritical drying of ethanol method with tetraethylorthosilicate(TEOS) as silica source, methyl triethoxysilane (MTMS) as modifier, ethanol as solvent. Moreover, the structure and adsorption property of SiO 2 aerogels were also studied. As results, the surface area of SiO 2 aerogels was 863.59 m 2/g, the pore volume was 3.57 cm 3/g, and the contact angle was 150°. Adsorption intensity of silica aerogels for organic liquid (alkanes, benzene compounds, and nitro-compounds) is bigger than that of activated carbon. The mass of the liquid absorbed increased linearly with the surface tension of the liquid. The lower surface tension and boiling point are, the shorter desorption time is. After regenerating 10 times, nitromethane regeneration rate remain the same, and almost more than 94%. So SiO 2 aerogels have good absorption and regeneration property.
KW - Adsorption
KW - Adsorption intensity
KW - Desorption
KW - Hydrophobic
KW - Regeneration
KW - SiO aerogels
UR - http://www.scopus.com/inward/record.url?scp=84861820500&partnerID=8YFLogxK
U2 - 10.1007/s11595-011-0366-2
DO - 10.1007/s11595-011-0366-2
M3 - 文章
AN - SCOPUS:84861820500
SN - 1000-2413
VL - 26
SP - 1079
EP - 1083
JO - Journal Wuhan University of Technology, Materials Science Edition
JF - Journal Wuhan University of Technology, Materials Science Edition
IS - 6
ER -