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2007 , Vol. 22 >Issue 1: 148 - 152

DOI: https://doi.org/10.3724/SP.J.1077.2007.00148

研究论文

聚酰亚胺/TiO2 复合膜的制备、表征和气体渗透性测定

  • 茂功 ,
  • 钟顺和
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  • 天津大学化工学院, 天津 300072

收稿日期: 2006-01-04

  修回日期: 2006-04-24

  网络出版日期: 2007-01-20

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Preparation, Characterization, and Gas Separation Properties of Polyimide/TiO2 Composite Membranes

  • WANG Mao-Gong ,
  • ZHONG Shun-He
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  • College of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Received date: 2006-01-04

  Revised date: 2006-04-24

  Online published: 2007-01-20

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摘要

以硅藻土-莫来石陶瓷 膜管为支撑体, 以TiO2 为过渡层, 通过溶胶-凝胶法制备了负载型聚酰亚胺/TiO2 复合膜. 采用FTIR、NMR、TG/DTA、TEM、BET和气体渗透法对复合膜进行了表 征和测试. 结果表明: TiO2 相通过与聚酰亚胺链上羧酸基支链发生键连形成有机无机组分交错分布的网状结构; 复合膜具有良好的热稳定性和有机无机兼容性; 相对于聚酰亚胺膜, 复合膜对H2 、CO2 、N2 和H2 O具有较高的分离性; TiO2 含量为15wt％的复合膜对H2 /N2 、CO2 /N2 和H2O/N2的分离因子分别为64.2、42.5和80.8.

关键词： 聚酰亚胺/TiO2; 复合材料; 溶胶-凝胶法; 气体分离

本文引用格式

茂功 , 钟顺和 . 聚酰亚胺/TiO2 复合膜的制备、表征和气体渗透性测定[J]. 无机材料学报, 2007 , 22(1) : 148 -152 . DOI: 10.3724/SP.J.1077.2007.00148

Abstract

A series of polyimide/TiO2 composite membranes supported on TiO2 /kieselguhr-mullite (K-M) were prepared via a sol-gel process. Their morphologies, chemical structures, thermal performances, pore distribution and gas permeability were characterized by transmission electron microscope (TEM), Fourier transform infrared (FTIR), solid-state 13C CP/MAS NMR, thermogravimetric analysis (TG/DTA), N2 adsorption and gas permeability measurement. The results show the TiO2 phase is well dispersed in the polyimide matrix. The TiO2 phase is connected with the polyimide through the pendant carboxyl along the polyimide chain. The polyimide/TiO2 composite membrane possesses finely thermal stability. The composite membranes show higher separation properties for H2, CO2, N2 and H2O when compared to pure polyimide. The separation factors of the polyimide/TiO2 composite membranes with 5wt% TiO2 contents for H2/N2, CO2/N2 and H2O/N2 are
64.2, 42.5 and 80.8, respectively.

Key words： polyimide/TiO2; composite materials; sol-gel; gas separation

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