食品科学2017，Vol.38Issue(5)：134-141,8.DOI:10.7506/spkx1002-6630-201705022
壳聚糖及壳聚糖-柠檬酸结构性质和功能性质的比较
Comparison of Structural and Functional Properties of Chitosan and Chitosan-Citric Acid Complex
摘要
Abstract
Chitosan-citric acid complex was prepared by acylation reaction between chitosan and citric acid,and its weight-average molar mass and water solubility were determined.Then,the structural characterization was investigated by Fourier transform infrared spectroscopy (FTIR),scanning electron microscopy (SEM),thermogravimetric analysis (TGA),X-ray diffraction (XRD) and nuclear magnetic resonance (NMR) to validate the occurrence of acylation reaction.In addition,we explored the adsorption efficiency of chitosan and its complex for cadmium ions and their scavenging capacity against hydroxyl and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radicals.Results indicated that compared with chitosan,the weight-average molar mass and water solubility of chitosan-citric acid complex significantly increased.At the same time,structural characterization directly or indirectly proved that citric acid was successfully introduced into chitosan via acylation reaction and the structure differences resulted in differences in the properties of chitosan and its complex.In addition,the adsorption efficiency for cadmium ions and free radical scavenging capacity of chitosan-citric acid complex were better than those of chitosan.This research can provide some evidence for the practical application of chitosan and its derivatives.关键词
壳聚糖/壳聚糖-柠檬酸/结构性质/功能性质Key words
chitosan/chitosan-citric acid complex/structural properties/functional properties分类
轻工纺织引用本文复制引用
崔文慧,郭芹,李庆鹏,靳婧,哈益明..壳聚糖及壳聚糖-柠檬酸结构性质和功能性质的比较[J].食品科学,2017,38(5):134-141,8.基金项目
农业部公益性行业科研专项(201303076 （）
201503142-01) （）
