基于超声处理和漆酶原位催化二聚的阿魏酸-淀粉复合物的制备及理化特性研究Study on Preparation and Physicochemical Properties of Ferulic Acid-Starch Complex Based on Ultrasonic Treatment and Laccase in Situ Catalyzed Dimerization
葛怿泽,辛嘉英,孙立瑞,刘思淼,锁博海,宋增武,夏春谷
摘要(Abstract):
采用一种新型的复合改性方法对淀粉进行改性,以漆酶原位催化阿魏酸二聚结合超声复合方法处理玉米淀粉,采用单因素试验和响应面法确定最佳的工艺条件:漆酶添加量为4.5 U/g,超声时间为30 min,超声温度为50℃,超声功率为400 W,此时得到的阿魏酸-淀粉复合物的复合率最高,为22.68%。通过傅里叶红外光谱和X射线衍射分析,阿魏酸与淀粉的结合都是通过非共价作用实现的。阿魏酸-淀粉复合物形成了V型晶体结构,两者结合主要是通过非共价作用的疏水作用力,漆酶原位催化阿魏酸二聚结合超声处理后阿魏酸-淀粉复合物仍然是V型,结晶度有所下降。此外,漆酶原位催化阿魏酸二聚结合超声处理的阿魏酸-淀粉复合物相较机械搅拌的阿魏酸-淀粉复合物DPPH自由基清除能力提高,淀粉的凝沉作用降低,淀粉的抗老化能力升高,淀粉的透光率降低。
关键词(KeyWords): 漆酶;阿魏酸;二聚;玉米淀粉;复合物;理化特性
基金项目(Foundation): 中央支持地方高校改革发展资金人才培养支持计划项目(高水平人才)(304017);; 黑龙江省自然科学基金项目(LH2020C063)
作者(Author): 葛怿泽,辛嘉英,孙立瑞,刘思淼,锁博海,宋增武,夏春谷
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