核桃青皮多酚改性壳聚糖-明胶复合膜的制备及其性能

发布时间：2018-06-05 03:33

本文选题：核桃青皮多酚 + 壳聚糖-明胶　；参考：《精细化工》2017年08期

【摘要】：以核桃青皮多酚、壳聚糖、明胶为原料,制备了核桃青皮多酚改性壳聚糖-明胶复合膜。经过力学性能、水溶解性、水蒸气透过率(WVP)、DPPH(1,1-二苯基-2-苦基肼)自由基清除率测试,得出复合膜液的最佳改性配方为:核桃青皮多酚提取物质量分数为2%(以膜溶液质量计),V(质量分数为2%壳聚糖)∶V(质量分数为10%明胶溶液)=45∶55,该配方制备的复合膜抗张强度为49.8 MPa、水溶解率为16.5%、WVP为0.15(g·mm)/(h·m~2·k Pa)、DPPH自由基清除率为80.40%。经X射线衍射、红外光谱和电镜扫描进行结构表征,结果证实改性过程中核桃青皮多酚与壳聚糖和明胶发生了交联反应,所制的复合膜结构致密,相容性良好,核桃青皮多酚能改善复合膜内部的结构并提升其综合性能。
[Abstract]:The polyphenol modified chitosan-gelatin composite membrane of walnut green peel was prepared by using pecan green skin polyphenols, chitosan and gelatin as raw materials. The scavenging rate of free radical was measured by mechanical properties, water solubility, water vapor transmittance and DPPH1 (1-diphenyl -2-bitter hydrazine) free radical scavenging rate. The optimum modified formula of the composite membrane solution was obtained as follows: the mass fraction of polyphenol extract from walnut green peel was 2% (mass fraction of 2% chitosan: v) (mass fraction was 10% gelatin solution 45: 55). The tensile strength of the film was 49.8 MPA, and the water solubility was 16.5g. The free radical scavenging rate was 80.40%. The structure was characterized by X-ray diffraction, infrared spectroscopy and scanning electron microscope. The results showed that the crosslinking reaction of walnut green skin polyphenols with chitosan and gelatin took place during the modification process, and the structure of the composite membrane was compact and the compatibility of the composite membrane was good. Walnut green peel polyphenols can improve the internal structure of the composite membrane and improve its comprehensive properties.
【作者单位】：喀什大学化学与环境科学学院;新疆大学应用化学研究所;
【基金】：新疆维吾尔自治区自然科学基金项目(201442137-9)~~
【分类号】：TB383.2

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