期刊
MOLECULES
卷 23, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/molecules23081921
关键词
chitosan; homogeneous system; quaternization; characterization; Alicyclobacillus acidoterrestris
资金
- National Natural Science Foundation of China (NSFC) [31501436]
- Scientific Research Foundation for Returned Overseas Chinese Scholars
- fund of the Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University (BTBU)
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, Beijing Technology and Business University, Beijing, China
- Open Research Fund Program of Beijing Key Lab of Plant Resource Research and Development, Beijing Technology and Business University (BTBU) [PRRD-2018-YB1]
Using a solvent formed of alkali and urea, chitosan was successfully dissolved in a new solvent via the freezing-thawing process. Subsequently, quaternized chitosan (QC) was synthesized using 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CHPTAC) as the cationic reagent under different incubation times and temperatures in a homogeneous system. QCs cannot be synthesized at temperatures above 60 degrees C, as gel formation will occur. The structure and properties of the prepared QC were characterized and quaternary groups were comfirmed to be successfully incorporated onto chitosan backbones. The degree of substitution (DS) ranged from 16.5% to 46.8% and the yields ranged from 32.6% to 89.7%, which can be adjusted by changing the molar ratio of the chitosan unit to CHPTAC and the reaction time. QCs inhibits the growth of Alicyclobacillus acidoterrestris effectively. Thus, this work offers a simple and green method of functionalizing chitosan and producing quaternized chitosan with an antibacterial effect for potential applications in the food industry.
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