An analysis of anisotropic gel forming process of chitosan

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题名:	An analysis of anisotropic gel forming process of chitosan
作者:	Dobashi, T (Dobashi, Toshiaki) Tomita, N (Tomita, Naoko) Maki, Y (Maki, Yasuyuki) Chang, CP (Chang, Chih Pong) Yamamoto, T (Yamamoto, Takao)
贡献者:	Dept Text Engn
关键词:	Chitosan Anisotropic Gel Dialysis Birefringence
日期:	2011-03
上传时间:	2013-01-24 15:24:26 (UTC+8)
摘要:	We have prepared anisotropic chitosan gels with birefringence by immersing a sandwiched chitosan in aqueous acetic acid into aqueous sodium hydroxide. The gel forming process was traced under observation with crossed nicols and open nicols with and without litmus agent. The time courses of the gel front, the birefringent layer and the pH-change layer agreed with each other fairly well. The early stage of the dynamics was expressed by a theory with an assumption of an OH(-) diffusion-limited process, whereas the behavior in the late stage deviated from the theoretical one. The deviation results from the effect of the outflow of protons, and the crossover of the two behaviors is attributed to the relaxation to the thermal equilibrium. (C) 2010 Elsevier Ltd. All rights reserved.
關聯:	CARBOHYDRATE POLYMERS 卷: 84 期: 2 特刊: SI 頁數: 709-712
显示于类别:	[紡織工程學系] 期刊論文

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