高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (9): 1404.

• 论文 • 上一篇    下一篇

壳聚糖膜的有机物－水溶液渗透汽化分离性能

李文俊, 马敬红   

  1. 复旦大学高分子科学系, 上海, 200433
  • 收稿日期:1993-12-09 修回日期:1994-03-28 出版日期:1994-09-24 发布日期:1994-09-24
  • 通讯作者: 李文俊,男,55岁,教授.
  • 作者简介:李文俊,男,55岁,教授.
  • 基金资助:

    国家自然科学基金

Pervaporation Separation of Organic-Aqueous Mixtures Using the Chitosan Membrane

LI Wen-Jun, MA Jing-Hong   

  1. Department of Macromolecular Science, Fudan University, Shanghai, 200433
  • Received:1993-12-09 Revised:1994-03-28 Online:1994-09-24 Published:1994-09-24

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摘要： 使用均质和复合壳聚糖膜对二氧六环-水和丙酮-水溶液的渗透汽化分离性能进行了研究。结果显示,该膜对两种混合物的分离有很高的选择性和渗透速率。考察料液组成和温度对均质膜分离的影响,随温度升高,分离系数与通量同时增加。从渗透速率与温度的Arrhenius关系求得总的和各组分的表现渗透活化能,复合膜在保持高选择性的同时,渗透速率大幅度提高。

关键词: 膜分离, 渗透汽化, 壳聚糖, 有机物－水溶液

Abstract: Pervaporation separation of dioxane-water and acetone-water mixtures has been studied by use of chitosan homogeneous and composite membranes. The results show that the membranes have an excellent selectivity and a permeation rate for the separation of the mentioned mixtures. For example, water in permeates is more than 99.5wt%, while the permeation rates are 946.5, 306.9g·(m2·h)-1 for dioxane-water(60℃)and acetone-water (40℃)mixtures, respectively, when the feeds are close to azeotropic compositions.With increasing temperature, the increases of both in flux and separation factor have been observed.Employing the composite membrane, the fluxes have a more conspicuous increase than that of homogeneous membrane, meanwhile, the selectivities have an appropriate reduction.

Key words: Membrane separation, Pervaporation, Chitosan, Organic-aqueous mixtures

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