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《Journal of South China University of Technology(Natural Science Edition)》 2006-01
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Effect of Multicomponent Coagulating Baths on Pervaporation Performance of Chitosan Membrane

Yan Bing Zhao Yao-ming Gao Guang(College of Materials Science and Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China)  
During the formation of the chitosan membrane,there arises the diffusion and exchange of multiple substances,and the combination and decomposition of various ions.In this paper,the effects of these factors were preliminarily investigated by using a series of multicomponent coagulating baths,with corresponding mechanisms being also studied.The results show that the difference between the diffusion 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 performance,and the corresponding membrane is of good stability,improved separation coefficient and permeation flux.
【CateGory Index】: TB383.2
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