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Inverse solubility of chitin/chitosan in aqueous alkali solvents at low temperature
Ru, Geying1; Wu, Shuaishuai1,2; Yan, Xiaoshuang1,2; Liu, Biaolan1; Gong, Pei1,2; Wang, Liying1; Feng, Jiwen1
2019-02-15
Source PublicationCARBOHYDRATE POLYMERS
ISSN0144-8617
Volume206Pages:487-492
AbstractThe 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.
KeywordChitin Chitosan Dissolution Cation effect NMR
Funding OrganizationNational 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
DOI10.1016/j.carbpol.2018.11.016
WOS KeywordCELLULOSE DISSOLUTION ; CHITOSAN ; CHITIN ; ACETYLATION ; DEGRADATION ; MECHANISM ; CHLORIDE ; WATER
Language英语
Funding ProjectNational Natural Science Foundation of China[21474130]
Funding OrganizationNational 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
WOS Research AreaChemistry ; Polymer Science
WOS SubjectChemistry, Applied ; Chemistry, Organic ; Polymer Science
WOS IDWOS:000452982700055
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.apm.ac.cn/handle/112942/13509
Collection中国科学院武汉物理与数学研究所
Corresponding AuthorFeng, Jiwen
Affiliation1.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
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Ru, Geying,Wu, Shuaishuai,Yan, Xiaoshuang,et al. Inverse solubility of chitin/chitosan in aqueous alkali solvents at low temperature[J]. CARBOHYDRATE POLYMERS,2019,206:487-492.
APA Ru, Geying.,Wu, Shuaishuai.,Yan, Xiaoshuang.,Liu, Biaolan.,Gong, Pei.,...&Feng, Jiwen.(2019).Inverse solubility of chitin/chitosan in aqueous alkali solvents at low temperature.CARBOHYDRATE POLYMERS,206,487-492.
MLA Ru, Geying,et al."Inverse solubility of chitin/chitosan in aqueous alkali solvents at low temperature".CARBOHYDRATE POLYMERS 206(2019):487-492.
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