期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 193, 期 -, 页码 474-480出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.10.101
关键词
Chitosan; Isocyanate; Antimicrobial activities
资金
- Natural Science Foundation of Inner Mongolia [2019MS02018]
- Science and Technology Project in Inner Mongolia [2021GG0078]
- Major Science and Technology Projects in Inner Mongolia [2019ZD001]
Six cyclic substituted chitosan derivatives were synthesized and characterized by various methods, showing greater antibacterial efficacy against Gram-positive bacteria compared to chitosan. The results suggest that these derivatives have potential as new pesticides.
Six cyclic substituted chitosan derivatives were synthesized, and their structures were characterized by FTIR, C-13 NMR 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 C-2-2-naphthylamine formamide-C-6-2-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 C-2-cyclohexylamine formamide-C-6-cyclohexylamine formyl ester-low chitosan against Fusarium equiseti and Verti-cillium 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.
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