A novel zein/poly (propylene carbonate)/nano-TiO2 composite films with enhanced photocatalytic and antibacterial activity
A novel zein/poly (propylene carbonate)/nano-TiO2 composite films with enhanced photocatalytic and antibacterial activity
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一种新型玉米醇溶蛋白/聚碳酸丙烯酯/纳米TiO2复合薄膜，具有增强的光催化和抗菌活性
DOI：
10.1016/j.procbio.2018.03.029
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发表时间：
2018-07-01
影响因子：
4.4
通讯作者：
Chen, Ye
中科院分区：
文献类型：
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作者：
Li, Shuhong;Zhao, Shuang;Chen, Ye
以玉米醇溶蛋白、聚碳酸亚丙酯（PPC）和纳米TiO 2为原料，采用挤出成型技术制备复合膜。通过扫描电镜（SEM）、差示扫描量热仪（DSC）、傅立叶变换红外光谱（FTIR）和力学性能测试对样品进行了表征。基于哈尔西方程，建立了拉伸强度与相对湿度的关系，预测了复合膜在不同湿度条件下的拉伸性能。SEM研究表明，玉米醇溶蛋白和PPC能形成均匀的网络结构，纳米TiO 2在膜中分布均匀。此外，复合膜具有良好的热稳定性。结构分析表明，酯基是负责形成复合物的主要力量。此外，光催化降解橙子（MO）符合准一级动力学，MO的去除率可达85.06%。抑菌实验表明，玉米醇溶蛋白/PPC/纳米TiO 2膜对大肠杆菌有较好的抑菌效果。coli、S.金黄色葡萄球菌和沙门氏菌。所获得的结果表明，所设计的薄膜可能是一个潜在的替代食品包装。
Composite films were prepared by extrusion technology using zein, poly propylene carbonate (PPC) and nano-TiO2. The samples were characterized by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), fourier transform infrared spectroscopy (FTIR) and mechanical properties experiments. Based on the Halsey equation, the relationship between tensile strength and relative humidity is established to predict the tensibility of the composite films under different humidity conditions. The SEM study revealed that zein and PPC could form a homogeneous network structure and uniform distribution of nano-TiO2 in films. Furthermore, the composite films presented a good thermal stability. The structural analysis showed that ester groups were major forces responsible for complex formation. In addition, the photocatalytic degradation of methyl orange (MO) followed pseudo first-order kinetics was also investigated, and the removal rate of MO could achieve up to 85.06%. The antibacterial experiment indicated that zein/PPC/nano-TiO2 film had good activity against the E. coli, S. aureus and salmonella. The obtained results indicated the designed film may be a potential alternative for food packaging.