高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (3): 415.

• 论文 • 上一篇    下一篇

壳聚糖膜结构与乙醇/水混合液的渗透汽化性能

李文俊, 潘文森, 唐颖   

  1. 复旦大学材料科学系, 上海, 200433
  • 收稿日期:1991-02-08 出版日期:1992-03-24 发布日期:1992-03-24
  • 通讯作者: 李文俊
  • 基金资助:

    中国石化总公司发展部资助

Structure of Chitosan Membrane and the Pervaporation of Ethanol/Water Mixtures by the Membrane

LI Wen-jun, PAN Wen-sen, TANG Ying   

  1. Department of Material Science, Fudan University, Shanghai, 200433
  • Received:1991-02-08 Online:1992-03-24 Published:1992-03-24

摘要: 用渗透汽化膜分离混合液体,纤维素[1]、赛璐玢[2]等作醇/水分离膜有较高的渗透通量,但分离系数低.甲壳素是广泛存在于自然界的一类天然高分子.前文报道了用甲壳素脱乙酰基的产物壳聚糖(CS)作醇/水渗透汽化(PV)分离膜,在一定的原料液浓度下具有较好的选择渗透性.本文讨论CS膜结构对乙醇/水混合液PV性能的影响,并探讨了提高选择性的途径.

关键词: 壳聚糖, 渗透汽化, 膜分离, 乙醇/水混合液

Abstract: The present paper covers the deacetylation degree and crystallinity of chitosan membrane, the effect of the feed composition and temperature on the permselectivity of ethanol/water mixtures permeated through the chitosan membrane.The results indicate that the permselectivity of the chitosan membrane is mainly affected by the free volume in the membrane.Both high separation factor and flux were observed when the chitosan membrane was neutralized with sulphuric acid.This behavior should be attributed to the hydrophilicity of the membrane and the ap-propritate free volume in the membrane caused by ion-crosslinking.

Key words: Chitosan, Pervaporation, Membrane separation, Ethanol/water mixture

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