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Influence of anionic structure on the dissolution of chitosan in 1-butyl-3-methylimidazolium-based ionic liquids
Chen, Qingtai1; Xu, Airong1; Li, Zhiyong1; Wang, Jianji1; Zhang, Suojiang2; Chen, QT
2011
Source PublicationGREEN CHEMISTRY
ISSN1463-9262
Volume13Issue:12Pages:3446-3452
AbstractThe high crystallization degree of chitosan and therefore its poor solubility in water and in most of the conventional organic solvents limits its extensive applications in practical processes. In this study, ionic liquids [C(4)mim][HCOO], [C(4)mim][CH(3)COO], [C(4)mim][CH(3)CH(2)COO], [C(4)mim][CH(3)CH(2)CH(2)COO], [C(4)mim][HOCH(2)COO], [C(4)mim][C(6)H(5)COO], [C(4)mim][CH(3)CHOHCOO] and [C(4)mim][N(CN)(2)] have been used to study the effect of anionic structure on solubility of chitosan and the possible dissolution mechanism in ionic liquids. For this purpose, solubilities of chitosan in these ionic liquids have been determined as a function of temperature, and hydrogen bond accepting ability of the ionic liquids has been estimated by (1)H NMR and solvatochromic UV/vis measurements. At the same time, the interaction between [C(4)mim][CH(3)COO] and chitosan in the chitosan + [C(4)mim][CH(3)COO] solution is investigated by (13)C NMR, and the regenerated chitosan from ionic liquids by addition of ethanol is characterized by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). It is shown that in the ionic liquids investigated, [C(4)mim][CH(3)COO] is the most efficient ionic liquid for the dissolution of chitosan. Solubilities of chitosan increase almost linearly with increasing hydrogen bond accepting ability of the ILs. Both the anions and the [C(4)mim](+) cation play important roles in the dissolution of chitosan, possibly by the disruption of native hydrogen bonds in chitosan. In addition, good thermal stability has been observed for the regenerated chitosan.
KeywordSolvent Chitin Cellulose Acid Solubilization Derivatives Chloride Salts Polar
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c1gc15703e
Indexed BySCI
Language英语
WOS KeywordSOLVENT ; CHITIN ; CELLULOSE ; ACID ; SOLUBILIZATION ; DERIVATIVES ; CHLORIDE ; SALTS ; POLAR
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000297424900017
Citation statistics
Cited Times:107[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5390
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorChen, QT
Affiliation1.Henan Normal Univ, Sch Chem & Environm Sci, Key Lab Green Chem Media & React, Minist Educ, Xinxiang 453007, Henan, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Chen, Qingtai,Xu, Airong,Li, Zhiyong,et al. Influence of anionic structure on the dissolution of chitosan in 1-butyl-3-methylimidazolium-based ionic liquids[J]. GREEN CHEMISTRY,2011,13(12):3446-3452.
APA Chen, Qingtai,Xu, Airong,Li, Zhiyong,Wang, Jianji,Zhang, Suojiang,&Chen, QT.(2011).Influence of anionic structure on the dissolution of chitosan in 1-butyl-3-methylimidazolium-based ionic liquids.GREEN CHEMISTRY,13(12),3446-3452.
MLA Chen, Qingtai,et al."Influence of anionic structure on the dissolution of chitosan in 1-butyl-3-methylimidazolium-based ionic liquids".GREEN CHEMISTRY 13.12(2011):3446-3452.
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