期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 134, 期 26, 页码 -出版社
WILEY
DOI: 10.1002/app.44989
关键词
biopolymers and renewable polymers; grafting; ionic liquids; polysaccharides; thermogravimetric analysis
资金
- National Natural Science Foundation of China [21574137, 21104087, 51373186]
- Cultivation Project of the Institute of Chemistry of the Chinese Academy of Sciences [CMS-PY-201239]
To improve the solubility and antibacterial activity of chitosan and expand its applications, we synthesized sulfopropyl chitosan (SP-CS) with various degrees of substitution (DSs) under mild and green reaction conditions in the aqueous solution of an ionic liquid by a green process. The chemical structures of the polymers were verified by Fourier transform infrared spectroscopy and H-1-NMR, and the thermal stability was studied by thermogravimetric analysis. After modification, the water solubility of chitosan was improved significantly, and SP-CS showed excellent solubility in water at neutral pH. The antibacterial activities of the SP-CSs with various DSs were systematically studied for the first time by the Oxford cup method and optical density method. The results suggest that the antimicrobial properties of SP-CS were enhanced by the introduction of sulfopropyl and increased with increasing DS. The application of chitosan could be expanded, and SP-CS has the potential to be used as a water-soluble antimicrobial. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44989.
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