高等学校化学学报2011，Vol.32Issue(10)：2256-2261,6.
表面修饰的有机-无机杂化微孔SiO2膜的制备及氢气分离性能
Surface Modified Organic-inorganic Hybrid Microporous Silica Membranes for Hydrogen Separation
摘要
Abstract
Organic-inorganic hybrid silica membranes were prepared by sol-gel method with bridged silsesqui-oxane[1 ,2-bis( triethoxysilyl) ethane, BTESE] and phenyltriethoxysilane ( PTES) as precursors. The pore structure and hydrophobic property of the hybrid silica membranes were characterized by N2 adsorption, contact angle meter, TG and FTIR. The hydrogen permeation and separation performance was also investigated. The results show that the modified hybrid silica membranes possess a desirable microporous structure with a pore width centered at 0. 4-0. 6 nm. Such a pore structure can be retained after aging for 30 d under a temperature of 40 ℃ and a relative humidity of 70% -80%. The hybrid silica membranes become hydrophobic after modification, with a water contact angle of (125 ±0.4)° at a PTES/BTESE molar ratio of 0.6. The transportation of hydrogen in the hybrid silica membranes complies with the activated diffusion mechanism, with a permeance of 8.71×10-7mol · m-2 · Pa-1 · s-1 and a H2/CO2 permselectivity of 5.53.关键词
有机-无机杂化SiO2膜/苯基/孔结构/氢气分离Key words
Organic-inorganic hybrid-SiO2/ Phenyl/ Pore structure/ Hydrogen separation分类
化学化工引用本文复制引用
段小勇,韦奇,何俊,闫建平,李群艳,聂祚仁..表面修饰的有机-无机杂化微孔SiO2膜的制备及氢气分离性能[J].高等学校化学学报,2011,32(10):2256-2261,6.基金项目
国家“八六三”计划项目(批准号:2009AA03Z213)资助. （批准号:2009AA03Z213）
