半纤维素-氨基葡萄糖-锌(Ⅱ)复合物的抗菌及抗氧化性能研究

Antibacterial and antioxidant activity of hemicellulose-glucosamine-Zn(Ⅱ) complex

抗菌抗氧化材料近年来成为食品功能材料、生物医用材料、环境工程材料领域的研究热点。利用美拉德反应制备了半纤维素-氨基葡萄糖-锌(Ⅱ)复合物(HGZC),通过紫外吸收、褐变强度、荧光变化、红外光谱、X射线衍射、抗氧化和抗菌活性等方法研究了反应动力学及产物的结构与性能。结果表明,HGZC具有无定形结构,并形成了席夫碱的Zn(Ⅱ)配合物。紫外吸收表明Zn(Ⅱ)能抑制半纤维素与氨基葡萄糖之间的美拉德反应。HGZC具有较高的抗氧化活性,最大DPPH自由基清除率为85.6%。同时,HGZC具有良好的抗菌功能。聚合物基体和锌之间的协同效应增强了HGZC的抗菌和抗氧化活性。

In recent years,antibacterial and antioxidant materials attracted increasing attention in the field of food industry,biomedical and environment engineering.A hemicellulose-glucosamine Zn(Ⅱ)complex(HGZC)was developed via Maillard reaction.The HGZC was characterized by UV absorbance,browning intensity,fluorescence changes,FT-IR,XRD,antioxidant activity and antibacterial assessment were evaluated.Results showed HGZC is a Schiff base Zn(Ⅱ)complex and had amorphous structure.UV absorbance indicated Zn(Ⅱ)can inhibit thE-maillard reaction between hemicellulose and glucosamine.HGZC had good antioxidant activity and the maximum DPPH scavenging activity was85.6%.Meanwhile,HGZC exhibited excellent antibacterial activity.The synergy effect between polymer matrix and Zn(II)had greatly enhanced antibacterial and antioxidant activity of the complex.