期刊
POLYMERS
卷 10, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/polym10040395
关键词
chitosan derivative; sulfonated chitosan; antioxidant ability; antifungal activity
资金
- Natural Science Foundation of China [41576156]
- Shandong Province Science and Technology Development Plan [2015GSF121045]
- Yantai Science and Technology Development Plan [2015ZH078]
- Technology Research Funds Projects of Ocean [2015418022-3]
We successfully synthesized the water-soluble chitosan derivatives propane sulfonated chitosan (PSCS) and dipropane sulfonated chitosan (DPSCS) in this paper. These derivatives were characterized by FTIR, H-1 NMR, and C-13 NMR. Moreover, the antioxidant activity of the chitosan derivatives was evaluated by free radical scavenging ability (against DPPH-radical, hydroxyl-radical, and superoxide-radical) and ferric reducing power. Meanwhile, inhibitory effects against two fungi were also tested. Our results suggested antioxidant abilities and antifungal properties were in order of DPSCS > PSCS > CS, which were consistent with the number of propane sulfonated groups. The scavenging activity of DPSCS against superoxide-radical and DPPH-radical were 94.1% and 100% at 1.6 mg/mL, respectively. The inhibitory indices of DPSCS against P. asparagi and F. oxysporum were up to 82.2% and 94% at 1.0 mg/mL, respectively. Obviously, the number of propane sulfonated groups of chitosan derivatives not only contributes to antioxidant activity, but also to antifungal activity. Therefore, DPSCS with more propane sulfonated groups endowed with antioxidant and antifungal activity that can be used as a candidate material in the food and pharmaceutical industries.
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