华南理工大学学报(自然科学版) ›› 2006, Vol. 34 ›› Issue (1): 110-113.

• 材料科学与技术 • 上一篇    下一篇

多组分处理浴对壳聚糖膜渗透汽化性能的影响

严冰 赵耀明 高洸   

  1. 华南理工大学 材料科学与工程学院,广东 广州 510640
  • 收稿日期:2005-04-12 出版日期:2006-01-25 发布日期:2006-01-25
  • 通信作者: 严冰(1974-),男,博士生,主要从事材料加工工程方面的研究 E-mail:ybcn@sina.com
  • 作者简介:严冰(1974-),男,博士生,主要从事材料加工工程方面的研究

Effect of Multicomponent Coagulating Baths on Pervaporation Performance of Chitosan Membrane

Yah Bing  Zhao Yao-ruing  Gao Guang   

  1. College of Materials Science and Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-04-12 Online:2006-01-25 Published:2006-01-25
  • Contact: 严冰(1974-),男,博士生,主要从事材料加工工程方面的研究 E-mail:ybcn@sina.com
  • About author:严冰(1974-),男,博士生,主要从事材料加工工程方面的研究

摘要: 在壳聚糖膜的制备成型过程中,会发生多种物质的扩散和交换,以及多种离子的结合与解离.文中通过采用一系列的多组分处理浴初步探索了这些影响因素的作用机理与效果.发现碱液在膜中的扩散速度和膜的中和再生反应速度的不同可导致膜表里结构均一性的变化.当处理温度在1o~20℃范围内时,三组分处理浴(0.5%NaOH/95% 乙醇/NaAc的质量比为80/20/0.5)的处理效果较好,膜的性能稳定,分离系数和渗透通量均有提高.

关键词: 壳聚糖, 多组分处理浴, 渗透汽化, 膜分离, 渗透通量

Abstract:

During the formation of the chitosan membrane,there arises the diffusion and exchange of multiple sub-stances,and the combination and decomposition of various ions.In this paper,the effects of these factors were pre-liminarily investigated by using a series of multicomponent coagulating baths,with corresponding mechanisms being also studied.The results show that the difference between the difusion speed and the neutralization speed arising in the alkali bath may result in the variation of the membrane structure homogeneity,and that,at a temperature range
of 10 to 20 ℃,the ter component coagulating bath(mass ratio of NaOH/ethanol/NaAc is 80/20/0.5)possesses good pervaporation perform ance,and the coresponding membrane is of good stability,improved separation coeffi-cient and permeation flux.

Key words: chitosan, multi-component coagulating bath, pervaporation, membrane separation, permeation rate