A DYNAMIC LASER LIGHT-SCATTERING STUDY OF CHITOSAN IN AQUEOUS-SOLUTION

	A DYNAMIC LASER LIGHT-SCATTERING STUDY OF CHITOSAN IN AQUEOUS-SOLUTION
	WU C ; ZHOU SQ ; WANG W
刊名	biopolymers
	1995
卷号	35 期号:4 页码:385-392
关键词	DEACETYLATED CHITINS CHITOSANS FIELD NMR-SPECTROSCOPY
ISSN号	0006-3525
通讯作者	wu c
中文摘要	the solution behavior of four chitosans (91% deacetylated chitin) with different molecular weights in 0.2m ch3cooh/0.1m ch3coona aqueous solution was investigated at 25 degrees c by dynamic laser light scattering (lls). the laplace inversion of the precisely measured intensity-intensity time correlation function leads us to an estimate of the line-width distribution g(gamma), which could be further reduced to a translational diffusion coefficient distribution g(d). by using a combination of static and dynamic lls results, i.e. mw and g(d), we were able to establish a calibration of d = k(d)m(-alpha d) with k(d) = (3.14 +/- 0.20) x 10(-4) and alpha(d) = 0.655 +/- 0.015. by using this calibration, we successfully converted g(d) into a molecular weight distribution f(w)(m). the larger alpha(d) value confirms that the chitosan chain is slightly extended in aqueous solution even in the presence of salts. this is mainly due to its backbone and polyelectrolytes nature. as a very sensitive technique, our dynamic lls results also revealed that even in dilute solution chitosan still forms a small amount of larger sized aggregates that have ben overlooked in previous studies. the calibration obtained in this study will provide another way to characterize the molecular weight distribution of chitosan in aqueous solution at room temperature. (c) 1995 john wiley & sons, inc.
收录类别	SCI收录期刊论文
语种	英语
公开日期	2010-12-30 ; 2011-06-10
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/26681]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	WU C,ZHOU SQ,WANG W. A DYNAMIC LASER LIGHT-SCATTERING STUDY OF CHITOSAN IN AQUEOUS-SOLUTION[J]. biopolymers,1995,35(4):385-392.
APA	WU C,ZHOU SQ,&WANG W.(1995).A DYNAMIC LASER LIGHT-SCATTERING STUDY OF CHITOSAN IN AQUEOUS-SOLUTION.biopolymers,35(4),385-392.
MLA	WU C,et al."A DYNAMIC LASER LIGHT-SCATTERING STUDY OF CHITOSAN IN AQUEOUS-SOLUTION".biopolymers 35.4(1995):385-392.