高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

Matrimid®5218/PSf双层非对称中空纤维膜的制备及其气体分离性能研究

丁晓莉1,2, 曹义鸣1, 赵红永1,2, 王丽娜1, 袁权1   

    1. 中国科学院大连化学物理研究所, 大连 116023;
    2. 中国科学院研究生院, 北京 100049
  • 收稿日期:2008-04-08 修回日期:1900-01-01 出版日期:2008-10-10 发布日期:2008-10-10
  • 通讯作者: 曹义鸣

Fabrication of Dual-layer Matrimid®/PSf Hollow Fiber Membrane and Its Gas Separation Performance

DING Xiao-Li1,2, CAO Yi-Ming1*, ZHAO Hong-Yong1,2, WANG Li-Na1, YUAN Quan1   

    1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
    2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-04-08 Revised:1900-01-01 Online:2008-10-10 Published:2008-10-10
  • Contact: CAO Yi-Ming

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摘要： 以商业化聚酰亚胺Matrimid®5218作为功能层材料, 聚砜作为支撑层材料, 采用共挤出法制备双层非对称中空纤维气体分离膜. 所制备的双层非对称中空纤维膜具有致密无缺陷的超薄皮层, 致密皮层厚度约为0.21 μm. 在25 ℃, 0.5 MPa下, CO2/CH4的选择性系数达51.39, CO2的渗透系数为46.29 GPU, O2/N2的选择性系数达到7.13, O2的渗透速率为6.38 GPU. 考察了温度和压力对膜的渗透系数和选择性系数的影响, 并考察了物理老化对膜性能的影响.

关键词: 超薄致密无缺陷皮层, 双层非对称中空纤维膜, 气体分离

Abstract: Dual-layer Matrimid®/PSf hollow fiber membranes for gas separation were fabricated via co-extrusion technology. The hollow fiber membranes have an ultrathin dense-selective layer of 0.21 μm. The hollow fiber membranes have a CO2 permeance of 46.29 GPU with a CO2/CH4 selectivity coefficient of 51.39 at 25 ℃and 0.5 MPa. And the hollow fiber membranes have an O2 permeance rate of 6.38 GPU with an O2/N2 selectivity coefficient of 7.13 at 25 ℃and 0.5 MPa. The effects of the test temperature and the feed pressure on the gas separation performance were investigated. Finally, the aging phenomena were investigated.

Key words: Ultrathin dense-selective layer, Dual-layer hollow fiber membranes, Gas separation

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