【论文题目】Preparation, characterization and antimicrobial activities of cyclic substituted chitosan derivatives（环取代壳聚糖衍生物的制备、表征和抑菌活性）
【作者】Zhenting Zhang, Zhimei Zhong*, Zhihong Zhao（张振婷，钟志梅*，赵智宏）
【Abstract】Six cyclic substituted chitosan derivatives were synthesized, and their structures were characterized by FTIR, 13CNMR and elemental analyses. Additionally, their antimicrobial properties were studied. The synthesized derivatives showed significantly greater zones of inhibition compared with chitosan. The zone of inhibition values produced by C2-2-naphthylamine formamide-C6-2-naphthylamine formyl ester-polymer chitosan against Sarcina sp., Staphylococcus aureus and Escherichia coli were 24 mm, 21 mm and 21 mm, respectively, whereas those of C2-cyclohexylamine formamide-C 6 -cyclohexylamine formyl ester-low chitosan against Fusarium equiseti and Verticillium dahliae were 14 mm and 15 mm, respectively. The antibacterial abilities of chitosan and its derivatives against the Gram-positive bacteria Sarcina sp. and Staphylococcus aureus were stronger than those against the Gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa. In addition, all of the high and low molecular weight chitosan derivatives showed greater bacteriostatic activities than antifungal activities. The results provided a useful reference for the development of chitosan and its derivatives used as new pesticides.
【Keywords】Chitosan; Isocyanate; Antimicrobial activities
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