食品科学2012，Vol.33Issue(17)：6-9,4.
乙酸均相体系中脉冲电场对壳聚糖降解的影响
Chitosan Degradation by Pulsed Electric Field in Acetic Acid Homogeneous Phase
摘要
Abstract
The effects of electric field strength, reaction time, chitosan concentration and solution conductivity on the degradation rate of chitosan were studied by pulsed electric field （PEF） treatment. The results showed that the molecular weight of chitosan revealed a decrease trend with increasing electric field strength, and a significant degradation was observed at high electric field strength. The degradation rate increased up to 54.2% after PEF treatment at 33.3 kV/cm; the degradation rate revealed a reduction with prolonged reaction time by 18.5% and 8.5% over the first 20 min and the last 70 rain, respectively. Increasing solution concentration or conductivity was unfavorable for the degradation of chitosan. Infrared spectral analysis indicated that the structure of chitosan was not changed during degradation. The X-ray diffraction patterns of original chitosan and degraded chitosan exhibited a similar structure with characteristic peaks at 2 θ of 10.4° and 20.2° , suggesting that degraded chitosan maintains its crystal structure.关键词
壳聚糖/脉冲电场/相对分子质量/降解Key words
chitosan/PEF/relative molecular weight/degradation分类
轻工纺织引用本文复制引用
罗文波,唐超,曾新安..乙酸均相体系中脉冲电场对壳聚糖降解的影响[J].食品科学,2012,33(17):6-9,4.基金项目
基金项目：国家自然科学基金项目 （）
广州市科技攻关计划项目 （）
