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	Radiation-induced changes in carboxymethylated chitosan
	Huang, Ling ; Peng, Jing ; Zhai, Maolin ; Li, Jiuqiang ; Wei, Genshuan
	2007
关键词	carboxymethylated chitosan gamma-ray radiation effect AQUEOUS-SOLUTION DEPOLYMERIZATION DEACETYLATION DEGRADATION
英文摘要	This study focuses on the radiation effect of gamma-ray on carboxymethylated chitosan (CM-chitosan) in solid state. The changes in molecular weight of CM-chitosan with absorbed dose were monitored by viscosity method. Experimental results indicated that random chain scissions took place under irradiation. Radiation chemical yield (G(d)) of CM-chitosan in solid state with N-2-saturated was 0.49, which showed CM-chitosan has high radiation stability. Biomaterials composed of CM-chitosan can be thought to sterilize with low absorbed dose. FTIR and UV spectra showed that main chain structures of CM-chitosan were retained, carbonyl/carboxyl groups were formed and partial amino groups were eliminated in high absorbed dose. XRD patterns identified that the degradation of CM-chitosan occurred mostly in amorphous region. (C) 2007 Elsevier Ltd. All rights reserved.; Chemistry, Physical; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; SCI(E); CPCI-S(ISTP); 0
语种	英语
DOI标识	10.1016/j.radphyschem.2007.01.013
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/252766]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Huang, Ling,Peng, Jing,Zhai, Maolin,et al. Radiation-induced changes in carboxymethylated chitosan. 2007-01-01.

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