Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (1): 110-113.

• Materials Science & Technology • Previous Articles     Next Articles

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

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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