高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (7): 1584.doi: 10.7503/cjcu20140076

• 高分子化学 • 上一篇    下一篇

金属有机骨架材料/聚酰亚胺混合基质膜的制备及气体分离性能

段翠佳1,2, 曹义鸣1(), 介兴明1, 王丽娜1, 袁权1   

  1. 1. 中国科学院大连化学物理研究所洁净能源国家实验室, 大连 116023
    2. 中国科学院大学, 北京 100049
  • 收稿日期:2014-01-23 出版日期:2014-07-10 发布日期:2014-05-12
  • 作者简介:联系人简介: 曹义鸣, 男, 博士, 研究员, 博士生导师, 主要从事膜技术研究. E-mail: ymcao@dicp.ac.cn
  • 基金资助:
    国家“八六三”计划项目(批准号: 2012AA03A611)资助

Preparation and Gas Separation Properties of Metal-organic Frameworks/Polyimide Mixed Matrix Membranes

DUAN Cuijia1,2, CAO Yiming1,*(), JIE Xingming1, WANG Lina1, YUAN Quan1   

  1. 1. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-01-23 Online:2014-07-10 Published:2014-05-12
  • Contact: CAO Yiming E-mail:ymcao@dicp.ac.cn

摘要:

合成了3种不同结构、 粒径和气体吸附性能的金属有机骨架材料(MOFs): 微米级Cu3(BTC)2、 亚微米级ZIF-8和S-Cu3(BTC)2. 氮气吸附等温线分析结果表明, ZIF-8和Cu3(BTC)2具有较大比表面积(1653和1439 m2/g), S-Cu3(BTC)2的比表面积为171.4 m2/g. 用共混法将MOFs直接引入聚酰亚胺中制备了MOFs/聚酰亚胺混合基质膜(MMMs). X射线衍射(XRD)和全反射红外光谱(FTIR-ATR)分析结果表明, MOFs在混合基质膜中保持物理和化学稳定. 气体渗透测试结果表明, MOFs的加入使膜的气体渗透分离性能明显提高, S-Cu3(BTC)2使渗透系数增加了1.75倍; ZIF-8和Cu3(BTC)2使渗透系数增加了3倍左右; 同时, 膜的气体分离系数变化很小.

关键词: 金属有机骨架材料, 聚酰亚胺, 混合基质膜, 气体分离

Abstract:

Three metal-organic frameworks(MOFs) with different structure, particle size and gas adsorption properties were synthesized: micron-scale Cu3(BTC)2, sub-micron ZIF-8 and S-Cu3(BTC)2. Nitrogen adsorption-desorption isotherms of MOFs showed that ZIF-8 and Cu3(BTC)2 possessed quite large BET surfaces(1653 and 1439 m2/g), and BET surface of S-Cu3(BTC)2 was 171.4 m2/g. MOFs were directly introduced into polyimide to fabricate mixed matrix membranes(MMMs). It was proved by XRD and FTIR-ATR characterizations that MOFs had no structural or chemical degradation in MMMs. Gas permeation test result indicated that gas separation properties of MMMs were enhanced as MOFs were added. Comparing with pure polyimide membrane, the adding of ZIF-8 or Cu3(BTC)2 brought gas permeability increase about 3 times, gas permeability of MMMs with S-Cu3(BTC)2 increased 175%. Meanwhile gas selectivies for O2/N2 and CO2/CH4 decreased slightly.

Key words: Metal-organic framework, Polyimide, Mixed matrix membrane, Gas separation

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