天津科技大学学报2017，Vol.32Issue(3)：29-33,44,6.DOI:10.13364/j.issn.1672-6510.20150220
酪氨酸酶催化低聚壳聚糖-酚酸接枝共聚的研究
Grafting Laccase-catalyzed Oxidation of Phenolic Acids onto Oligochitosan
摘要
Abstract
Oligochitosans were grafted with ferulic acid,protocatechuic acid and gallic acid by tyrosinase.Linear potenti-ometric titration,FTIR and TGA were used to characterize the graft ratio,structural changes of grafted product and its anti-oxidant and hygroscopicity.The results show that the phenolic hydroxyl in phenolic acid reacted with amino-group in the oligochitosan initiated by tyrosinase in this catalytic process,confirming the occurrence of a Schiff-base reaction.The ther-mal stability,antioxidant property and moisture absorption of the grafted product have all been improved.After 5 min reac-tion,the oligochitosan-ferulic acid,oligochitosan-gallic acid and oligochitosan-protocatechuic acid compared with the free radical clearance rate of oligochitosan increased by 20.15%,66.30% and 89.21%,respectively.关键词
酪氨酸酶/低聚壳聚糖/酚酸/抗氧化性/吸湿性能Key words
tyrosinase/oligochitosan/phenolic acids/antioxidant activity/moisture absorption分类
通用工业技术引用本文复制引用
裴继诚,许小龙,胡稳,卜鑫,殷允北,张方东..酪氨酸酶催化低聚壳聚糖-酚酸接枝共聚的研究[J].天津科技大学学报,2017,32(3):29-33,44,6.基金项目
国家自然科学基金资助项目(31170548) （31170548）
国家级大学生创新创业训练计划项目(201510057099) （201510057099）
