Inverse solubility of chitin/chitosan in aqueous alkali solvents at low temperature

doi:10.1016/j.carbpol.2018.11.016

	Inverse solubility of chitin/chitosan in aqueous alkali solvents at low temperature
	Feng, Jiwen 2; Wang, Liying 2; Gong, Pei 1,2; Liu, Biaolan 2; Yan, Xiaoshuang 1,2; Wu, Shuaishuai 1,2; Ru, Geying 2
刊名	CARBOHYDRATE POLYMERS
	2019-02-15
卷号	206 页码:487-492
关键词	Chitin Chitosan Dissolution Cation effect NMR
ISSN号	0144-8617
DOI	10.1016/j.carbpol.2018.11.016
英文摘要	The low-temperature dissolving mechanism of chitin/chitosan in the alkali (LiOH, NaOH and KOH) aqueous solvents has not been well established yet As revealed by our XRD and NMR methods, the prepared deacetylated chitins can be categorized as chitin (DA = 0.94-0.74), chitosan I (DA = 0.53-0.25) and chitosan II (DA < 0.25). Aqueous alkali exhibits fully different dissolving power in the above three regions, i.e., KOH > NaOH > > LiOH for chitin, KOH approximate to LiOH approximate to NaOH for chitosan I, and inverse LiOH > > KOH > NaOH for chitosan II. While in the two-alkali mixed solvent, NaOH or KOH can destroy the interaction of LiOH with D9 (chitosan II region) in the order of NaOH > > KOH, but LiOH cannot destroy the interaction of KOH with raw chitin. The varied solubility of chitin/chitosan in alkali solvent is suggested to be from the cation's preferential interaction rather than OH ion and low temperature.
资助项目	National Natural Science Foundation of China[21474130]
WOS关键词	CELLULOSE DISSOLUTION ; CHITOSAN ; CHITIN ; ACETYLATION ; DEGRADATION ; MECHANISM ; CHLORIDE ; WATER
WOS研究方向	Chemistry ; Polymer Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000452982700055
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/13508]
专题	中国科学院武汉物理与数学研究所
通讯作者	Feng, Jiwen
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Natl Ctr Magnet Resonance Wuhan, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Feng, Jiwen,Wang, Liying,Gong, Pei,et al. Inverse solubility of chitin/chitosan in aqueous alkali solvents at low temperature[J]. CARBOHYDRATE POLYMERS,2019,206:487-492.
APA	Feng, Jiwen.,Wang, Liying.,Gong, Pei.,Liu, Biaolan.,Yan, Xiaoshuang.,...&Ru, Geying.(2019).Inverse solubility of chitin/chitosan in aqueous alkali solvents at low temperature.CARBOHYDRATE POLYMERS,206,487-492.
MLA	Feng, Jiwen,et al."Inverse solubility of chitin/chitosan in aqueous alkali solvents at low temperature".CARBOHYDRATE POLYMERS 206(2019):487-492.