标题：Homogeneous synthesis and characterization of quaternized chitin in NaOH/urea aqueous solution
作者：Ding, FY (Ding, Fuyuan); Shi, XW (Shi, Xiaowen); Li, XX (Li, Xiaoxia); Cai, J (Cai, Jie); Duan, B (Duan, Bo); Du, YM (Du, Yumin)
来源出版物：CARBOHYDRATE POLYMERS 卷：87 期：1 页：42-426 出版年：JAN 4 2012
摘要：Water-soluble and white quaternized chitin (QC) was homogeneously synthesized by stirring transparent chitin solution (2%) in 8 wt%NaOH/4 wt% urea aqueous solution containing 2,3-Epoxypropyltrimethylammonium Chloride (EPTMAC) at 10 degrees C for 24h. The structure and properties of quaternized chitin were characterized by FT-IR, XRD, (1)H NMR, GPC, element analysis and zeta-potential. The results indicate that quaternary groups were successfully incorporated onto chitin backbones and the degree of substitution (DS) of quaternary groups can be easily adjusted by changing the molar ratio of chitin unit to EPTMAC. Additionally, quaternized chitin shows better antibacterial activity against Escherichia coli and Staphylococcus aureus as compared with chitosan. Thus, this work provides a simply and "green" method to functionalize chitin and the resulting quaternized chitin may have potential applications in environmental, food and biomedical fields.
作者关键词：Chitin; Quaternization; Homogeneous reaction; NaOH/urea solvent; Antimicrobial activity
扩展关键词：ANTIBACTERIAL ACTIVITY; ANTIMICROBIAL ACTIVITY; BETA-CHITIN; CHITOSAN; WATER; FIBER
通讯作者地址：Shi, XW (通讯作者),Wuhan Univ, Dept Environm Sci, Coll Resource & Environm Sci, Wuhan 430072, Peoples R China
[Ding, Fuyuan]Wuhan Univ, Dept Environm Sci, Coll Resource & Environm Sci, Wuhan 430072, Peoples R China
[Shi, Xiaowen] Wuhan Univ, Dept Environm Sci, Coll Resource & Environm Sci, Wuhan 430072, Peoples R China
[Li, Xiaoxia] Wuhan Univ, Dept Environm Sci, Coll Resource & Environm Sci, Wuhan 430072, Peoples R China
[Cai, Jie] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China
[Duan, Bo] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China
[Du, Yumin] Wuhan Univ, Dept Environm Sci, Coll Resource & Environm Sci, Wuhan 430072, Peoples R China
学科类别：Chemistry; Polymer Science
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