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	Measurement of critical concentration for mesophase formation of chitosan derivatives in both aqueous and organic solutions
	Dong, Yan-ming ; Dong YM(董炎明) ; Mao, Wei ; Wang, Hui-wu ; Zhao, Ya-qing ; Li, Xiao-jian ; Bi, Dan-xia ; Yang, Liu-lin ; Ge, Qiang ; Fang, Xueming
	2006-07
关键词	chitosan O-acryloyl chitosan N-maleoyl chitosan critical concentration mesophase circular dichroism (CD)
英文摘要	A novel chitosan derivative, acryloyl chitosan (AcCs), and two N-maleoyl chitosans, MaCs-1 and MaCs-2, with different degrees of substitution were synthesized using completely deacetylated chitosan as raw material under different reaction conditions. AcCs is an amphiphilic chitosan derivative, but MaCs-1 and MaCs-2 are soluble in water and organic solvents respectively. The concentrated solutions of AcCs, MaCs-1 and MaCs-2 an demonstrated mesophases and were investigated using polarizing optical microscopy (POM). Circular dichroism (CD) was also employed for determining the critical concentration for mesophase formation. A broad peak in the visible light region of CD spectra had its origin in the appearance of the mesophase, and arose from the selective reflection of cholesteric helix pitches. The results of CD measurements agreed with those of POM. The critical concentration values for aqueous solutions were much lower than those for organic solutions, which was explained by the strong interactions between the chitosan derivatives and water. (C) 2006 Society of Chemical Industry.
语种	英语
出版者	JOHN WILEY & SONS LTD
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1002/pi.2099]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Dong, Yan-ming,Dong YM,Mao, Wei,et al. Measurement of critical concentration for mesophase formation of chitosan derivatives in both aqueous and organic solutions[J],2006.
APA	Dong, Yan-ming.,董炎明.,Mao, Wei.,Wang, Hui-wu.,Zhao, Ya-qing.,...&Fang, Xueming.(2006).Measurement of critical concentration for mesophase formation of chitosan derivatives in both aqueous and organic solutions..
MLA	Dong, Yan-ming,et al."Measurement of critical concentration for mesophase formation of chitosan derivatives in both aqueous and organic solutions".(2006).

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