摘要
基于壳聚糖良好的成膜、保水性,结合半胱氨酸的抗氧化、抑菌性和N-乙烯基吡咯烷酮的亲水性,制备了壳聚糖-乙烯基吡咯烷酮-半胱氨酸接枝共聚物(CTS-g-PVP-cys)。采用抑菌圈法研究了CTS-g-PVP-cys对大肠杆菌、金黄色葡萄球菌和蜡样芽孢杆菌的抑菌效果。结果表明:当共聚物中巯基含量为266μmol/g时,CTS-gPVP-cys对大肠杆菌、金黄色葡萄球菌均有较好抑菌效果,最大抑菌率分别为87.50%,89.33%,即CTS-g-PVP-cys很大程度上协同了半胱氨酸的抑菌性。同时,CTS-g-PVP-cys涂膜可降低水果中营养物质及水分的损失,具有防褐变效果,可作为良好的保鲜剂。
Chitosan-poly(N-vinylpyrrolidone)-cysteine graft copolymer(CTS-g-PVP-cys) was prepared thanks to the excellent film-forming and the water retention of CTS,antioxidant and antimicrobial activities of L-cys and hydrophilic properties of PVP. The inhibitory effects of CTS-g-PVP-cys on Escherichia coli,Bacillus cereus and Staphylococcus aureus were observed via the method of inhibition zone. The experimental results indicate that:when the content of thiol in copolymer is 266 μmol/g,CTS-g-PVP-cys exerts good antimicrobial effect on Escherichia coli and Staphylococcus aureus and the maximum inhibition rate are 87.50% and 89.33% respectively,that is,the copolymer has coordinated substantially the antimicrobial activity of cys. CTS-g-PVP-cys films can also reduce the losses of nutrients and water in fruits,it can be used as a good fresh keeping agent for fruits anti-browning.
作者
方亦齐
李灿楷
林杰
刘意
王玉栋
Fang Yiqi;Li Cankai;Lin Jie;Liu K;Wang Yudong(School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, China;School of Clinical Medicine & the First Affiliated Hospital, Guangdong Pharmaceutical University, Guangzhou 510080, China)
出处
《合成树脂及塑料》
CAS
北大核心
2018年第3期29-33,共5页
China Synthetic Resin and Plastics
基金
国家级大学生创新创业训练计划项目(2016 10573014)
广东省科技计划项目(2015第100号文)
关键词
改性壳聚糖
化学改性
抑菌性
水果保鲜
modified chitosan
chemical modification
antimicrobial activity
fruit preservation