高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (2): 301.

• 论文 • 上一篇    下一篇

PVA/PVP互穿网络膜的渗透蒸发性质(Ⅱ)

周继青, 叶匀分, 胡晓华, 平郑骅   

  1. 复旦大学高分子科学系, 教育部聚合物分子工程开放实验室, 上海 200433
  • 收稿日期:1999-03-25 出版日期:2000-02-24 发布日期:2000-02-24
  • 通讯作者: 平郑骅(1942年出生),男,教授,主要从事高分子化学与物理及膜科学研究.
  • 基金资助:

    国家自然科学基金(批准号:29774003)资助

The Pervaporation Properties of the Interpenetrating Network Membrane of Poly(vinyl alcohol) and Poly(vinyl pyrrolidone)(Ⅱ)

ZHOU Ji-Qing, YE Yun-Fen, HU Xiao-Hua, PING Zheng-Hua   

  1. Department of Macromolecular Science, Laboratory of Molecular Engineering for Polymers of Education Ministry, Fudan University, Shanghai 200433, China
  • Received:1999-03-25 Online:2000-02-24 Published:2000-02-24

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被引次数

38

摘要： 用4,4′-双叠氮-2,2′-二磺酸钠(DAS)和戊二醛对聚乙烯吡咯烷酮(PVP)和聚乙烯醇(PVA)依次进行光化学交联和化学交联,制备了具有互穿网络结构的渗透蒸发膜.研究了它们用于醇、酮和醚等有机溶剂脱水的渗透蒸发性质.结果表明,对于大多数有机溶剂,随着共混膜中PVP含量的增加,膜的渗透性明显提高,而膜的选择性有所下降.但用于THF脱水时,膜的选择性和渗透性均随着PVP含量的增加而增加.交联使膜的力学性能得到改善

关键词: 渗透蒸发, 互穿网络膜, DAS, 交联

Abstract: Anovel interpenetrating network(IPN) membrane of PVA/PVPcrosslinked by chemical crosslinking agent glutaraldehyde and water soluble photocrosslinking agent 4,4′diazostilbene2,2′disulfonic acid disodium salt(DAS) was prepared and the membrane performance in dehydration of some organic solvent by pervaporation as a function of IPNcomposition was investigated. It was found that the IPNmembrane possesses better separation properties compared with noncrosslinking blend. For a majority of organic solvents, the permeation increases with the increasing of PVPcontent in IPNwhile the selectivity to water decreases. In case of THF, both the selectivity and the permeation flux of IPNmembrane are obviously better than that of PVAmembrane, no matter what the PVPcontent is in IPNmembrane. The tension test showed that the mechanical properties of IPNare also remarkably improved.

Key words: Pervaporation, Interpenetrating network membrane(IPN), DAS, Crosslinking

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