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	Influence of degree of deacetylation on critical concentration of chitosan/dichloroacetic acid liquid-crystalline solution
	Dong, YM ; Dong YM(董炎明) ; Xu, CY ; Wang, JW ; Wu, YS ; Wang, M ; Ruan, YH
	2001-12-04
关键词	chitin chitosan liquid-crystalline polymers degree of deacetylation critical concentration
英文摘要	We prepared chitosans with various degrees of deacetylation (DDAs) by mixing completely deacetylated chitosan and acetic anhydride at room temperature without serious degradation and O-substitution. We obtained a standard curve to measure DDA by plotting the IR absorbance ratio of A(1560)/A(2880) against the known DDAs (from 1-100%) of 10 specimens. The effect of DDA on the critical concentration (C*) of chitosan/dichloroacetic acid solutions required to form mesophase was investigated by optical methods. A maximum C* value of 23 wt % appeared at a relative medium DDA (similar to 20%). The effect was explained by the disordering of chains with medium composition ratios of the copolymer of glucosamine and N-acetyl glucosamine. (C) 2002 John Wiley & Sons, Inc. J Appl Polym Sci 83: 1204-1208, 2002.
语种	英语
出版者	JOHN WILEY & SONS INC
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1002/app.2286]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Dong, YM,Dong YM,Xu, CY,et al. Influence of degree of deacetylation on critical concentration of chitosan/dichloroacetic acid liquid-crystalline solution[J],2001.
APA	Dong, YM.,董炎明.,Xu, CY.,Wang, JW.,Wu, YS.,...&Ruan, YH.(2001).Influence of degree of deacetylation on critical concentration of chitosan/dichloroacetic acid liquid-crystalline solution..
MLA	Dong, YM,et al."Influence of degree of deacetylation on critical concentration of chitosan/dichloroacetic acid liquid-crystalline solution".(2001).

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