Fabrication of organic-inorganic hybrid silica membranes for gas separation by alkane-bridged silsesquioxanes as precursors

被引：0

作者：

Song S. ^{[1
]}

Song H. ^{[1
]}

Wang C. ^{[1
]}

Qi H. ^{[1
]}

机构：

[1] State Key Laboratory of Materials-Oriented Chemical Engineering, Membrane Science and Technology Research Center, Nanjing Tech University, Nanjing

来源：

Qi, Hong (hqi@njtech.edu.cn) | 1760年 / Chinese Ceramic Society卷 / 44期

关键词：

Alkane-bridged silsesquioxanes; Gas separation; Microporous membrane; Sol-gel;

D O I：

10.14062/j.issn.0454-5648.2016.12.13

中图分类号：

学科分类号：

摘要：

Organic-inorganic hybrid silica sols based on bis(triethoxysilyl)methane (BTESM), 1,2-bis(triethoxysilyl)-ethane (BTESE) and 1,8-bis(triethoxysilyl)octane (BTESO) were prepared via a polymeric sol-gel process. The effects of precursor concentration and hydrolysis ratio on the properties (i.e. state, average particle size and particle size distribution) of three kinds of polymeric sols were also investigated. The properties of the organic-inorganic hybrid SiO2 powders were characterized by thermo-gravimetric/differential scanning calorimeter analysis (TG/DSC) and CO2 adsorption. The gas separation performance of BTESM, BTESE and BTESO membranes was evaluated via single gas permeation experiments. At 200℃ and 0.3 MPa, the BTESM membrane has a H2 permeance of 5.6×10-7 mol/(m2·s·Pa), and the permselectivities for H2/CO2, H2/N2 and H2/CH4 are 6.1, 26.7 and 50.9, respectively. Moreover, the N2, CH4 and SF6 permeances of the organic-inorganic hybrid SiO2 membranes increase as the number of carbon atoms in the alkane bridge of silsesquioxanes increases. © 2016, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：1760 / 1767

页数：7

共 23 条

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