摘要
本文研究纳米TiO_2粒径、超声时间与功率、吐温80添加量4个因素对壳聚糖/纳米TiO_2复合涂膜抗菌性能的影响;并对不同纳米TiO_2添加量制备的复合膜进行扫描电子显微镜(SEM)观察和热重分析(TG)。单因素抗菌结果表明:当纳米TiO_2粒径为30 nm、超声时间为50 min、超声功率为80 W、吐温80添加量为0.5%时,复合膜对金黄色葡萄球菌的抑菌效果最佳。SEM分析表明纳米TiO_2均能包埋于壳聚糖载体中,但有少许团聚。TG分析表明复合膜有较好的热稳定性。
In this paper,four factors including nano-TiO 2 particle size,ultrasonic power and time,the amounts of Tween 80 on the antibacterial property of chitosan/nano-TiO 2 composite coating film were investigated.The mechanical properties of the composite films with different adding amounts of nano-TiO 2 particles were characterized by scanning electron microscopy(SEM)and thermogravimetric analysis(TG).The antibacterial test results in the single factor test showed that the antibacterial effect of the composite coating film on Staphylococcus aureus was the best under the conditions of the diameter of nano-TiO 2 30 nm,the ultrasonic power 80 W and the ultrasonic time 50 min,the amount of Tween 80 0.5%,respectively.SEM analysis showed that the particles of nano-TiO 2 could be well encapsulated in chitosan but with some agglomeration.TG results also indicated that the chitosan-TiO 2 composite coating films exhibited the better thermal stability.
作者
邢亚阁
刘茜
江雨若
郭训练
岳文婷
许青莲
苟俊
XING Yage;LIU Qian;JIANG Yuruo;GUO Xunlian;YUE Wenting;XU Qinglian;GOU Jun(College of Food and Bioengineering,Xihua University,Chengdu 610039 China;Xihua University,Xihua University,Chengdu 610039 China;Quality and Safety Center for agricultural products,Agricultural Animal Husbandry Bureau of Aba Tibetan and Qiang Autonomous Prefecture, Aba Tibetan and Qiang Autonomous Prefecture,Aba 624000 China)
出处
《西华大学学报（自然科学版）》
CAS
2018年第2期34-39,63,共7页
Journal of Xihua University:Natural Science Edition
基金
四川省科技计划项目(2016FZ0019)
成都市科技惠民技术研发项目(2015-HM01-00454-SF)
四川省教育厅高校科研创新团队建设计划项目(15TD0017)
西华大学西华杯项目(2017065)
西华大学粮油工程与食品安全重点实验室项目(szjj2014-002)
四川省科技厅扶贫(产业类)(2017NFP0047)
关键词
壳聚糖
纳米TIO2
抑菌率
扫描电子显微镜
热重分析
chitosan
nano-TiO2
inhibition rate
scanning electron microscopy
thermogravimetric analysis
