期刊
CARBOHYDRATE POLYMERS
卷 194, 期 -, 页码 139-145出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.04.037
关键词
Proanthocyanidin; Chitosan; Graft; Antioxidant capacity; Antibacterial activity
资金
- Natural Science Foundation of Hebei Province [B2016202111]
In this study, chitosan (CS) was conjugated with proanthocyanidin (PA) by a free radical grafting reaction. The successful synthesis of PA-CS conjugate was confirmed by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance. The optimal molar ratio of PA to CS repeat unit for the preparation of PA-CS was 0.13: 1, which led to a high PA content of 381.76 mg PAE/g in PA-CS. The antioxidant assays demonstrated that PA-CS had much stronger radical scavenging activity and reducing power than the native CS. Especially, the half-inhibition concentrations of PA-CS against DPPH and ABTS radicals were only 6.2 mu g/mL and 5.9 mu g/mL, respectively. In addition, PA-CS showed an alteration in antibacterial activity compared with CS, and the alteration varied with bacterial strain.
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