东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2004, Vol. 25 ›› Issue (8): 808-811.DOI: -

• 论著 • 上一篇    下一篇

聚乙烯二甲基硅氧烷-聚偏氟乙烯复合分离膜的性能

孟波;谭小耀;杨乃涛;张宝砚   

  1. 东北大学理学院;山东理工大学化工学院;山东理工大学化工学院;东北大学理学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2004-08-15 发布日期:2013-06-24
  • 通讯作者: Meng, B.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(20076025)

Properties of polyvinyl dimethylsiloxane-polyvinylidene fluoride composite separation membranes

Meng, Bo (1); Tan, Xiao-Yao (2); Yang, Nai-Tao (2); Zhang, Bao-Yan (1)   

  1. (1) Sch. of Sci., Northeastern Univ., Shenyang 110004, China; (2) Coll. of Chem. Eng. and Technol., Shandong Univ. of Technol., Zibo 255049, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2004-08-15 Published:2013-06-24
  • Contact: Meng, B.
  • About author:-
  • Supported by:
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摘要： 为预测和评价聚偏氟乙烯(PVDF)和聚乙烯二甲基硅氧烷(PVDMS)多孔中空纤维复合膜的气体分离性能,提出了孔分布模型·通过比较模拟和实验结果,证明理论预测和实验结果具有很好的一致性·应用干 湿相转化法制备了PVDF多孔中空纤维膜,并且采用浸涂技术在PVDF中空纤维膜上制成厚度约为5～12μm的PVDMS致密膜层·通过气体渗透测试估计PVDF多孔基底膜的结构参数,同时也以氮气/氧气为介质对PVDMS PVDF复合中空纤维膜的分离性能进行了评价·实验结果表明,该复合膜具有较高的分离选择性,要制得致密无缺陷的复合膜,PVDMS致密涂层厚度不应小于5μm·

关键词: 纤维复合膜, 气体分离, 干湿相转化法, PVDMS

Abstract: A pore-distribution model was developed for predicting and evaluating gas separating property of polyvinyl dimethylsiloxane-polyvinylidene fluoride (PVDMS-PVDF) composite hollow fiber membranes. The experimental data of both permeability and selectivity are in good agreement with the theoretical results predicted by the pore-distribution model. The PVDMS-PVDF composite hollow fiber membranes were prepared through dry-wet phase inversion and dip-coating technique, of which the structural parameters of PVDF substrate membrane were estimated by gas permeation test, and the separating property was evaluated experimentally using N2/O2 as the medium. The experimental results indicate that the composite membrane has high selectivity/separating property and the thickness of PVDMS skin coat must be higher than 5 pm. so as to be compact without defects.

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