高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (6): 978.

• 研究快报 • 上一篇    下一篇

聚乙烯醇/壳聚糖共混膜优先透醇性能的研究

王新平1, 沈之荃1, 张富尧1, 林荣轩2   

  1. 1. 浙江大学高分子系, 杭州, 310027;
    2. 浙江大学化学系, 杭州, 310027
  • 收稿日期:1995-01-20 修回日期:1995-04-08 出版日期:1995-06-24 发布日期:1995-06-24
  • 通讯作者: 沈之荃
  • 作者简介:王新平,男,29岁,博士研究生.
  • 基金资助:

    国家教育委员会博士点基金;浙江省科学技术委员会资助

Studies on Selective Separation of Ethanol by Pervaporation Through Poly(vinyl alcohol)/Chitosan Blend Membrane

WANG Xin-Ping1, SHEN Zhi-Quan1, ZHANG Fu-Yao1, LIN Rong-Xuan2   

  1. 1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027;
    2. Department of Chemistry, Zhejiang University, Hangzhou, 310027
  • Received:1995-01-20 Revised:1995-04-08 Online:1995-06-24 Published:1995-06-24

关键词: 渗透蒸发, 聚乙烯醇/壳聚糖共混物膜, 乙醇水溶液

Abstract: It has been recognized generally that glassy polymer membranes preferentially permeate water and elastomer membranes preferentially permeate ethanol.Until now only a few alcohol-selective membranes have been developed such as silicone rubber membrane,having low flux and selectivity toward alcohol.In this paper,preferential separation of ethanol from aqueous solution through hydrophilic PVA/CS blend membrane has been investigated for the t time.The results show that PVA/CS membrane preferentially permeate ethanol at lower ethanol concentration in feed,and the selectivity of chitosan membrane toward alcohol can be greatly improved by introducing water-soluble polymer PVAinto chitosan. The membrane with PVAcontent of 53% (wt%) gives a separation factor 17.1 and a flux of 217 g·m-2·h-1at 8.7%(wt%) of ethanol in the feed at 20℃. The separation properties of this membrane were much higher than those of silicone rubber membrane usually used as alcohol-selective one.

Key words: Pervaporation, Poly(vinyl alcohol)/chitosan blend membrane, Watere-thanol mixture

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