壳聚糖
极限抗拉强度
材料科学
纳米颗粒
抗菌剂
化学工程
食品包装
热稳定性
水解
抗菌活性
化学
核化学
复合材料
纳米技术
细菌
食品科学
有机化学
工程类
生物
遗传学
作者
Liangfan Qu,Guiyun Chen,Shuang Dong,Yaoxing Huo,Zhonglin Yin,Shuhong Li,Ye Chen
标识
DOI:10.1016/j.indcrop.2018.12.093
摘要
Highly dispersible TiO2 nanoparticles were prepared through the hydrolysis of titanium alcohol, and a series of TiO2-modified zein/chitosan (CS) films were prepared through a process involving blending, solution casting and evaporation. The mechanical properties and the antibacterial capacity of the zein/CS/TiO2 films were characterized to explore the effects of different TiO2 nanoparticle contents. Results showed that the addition of nanoscale TiO2 remarkably improved the mechanical properties and thermal stability of the zein/CS/TiO2 film. The tensile strength of the zein/CS/TiO2 films significantly increased (p<0.05) with the increasing TiO2 loadings in films, reaching a maximum of 28.33 ± 1.53 MPa at 0.15 wt % TiO2 nanoparticles. The antibacterial effect of the composite films on Gram-positive bacteria (S. aureus) was more significant than that of Gram-negative bacteria (E. coli and S. enteritidis), and the antibacterial effect of UV light was better than that of dark conditions. In particular, the inhibition zones of zein/CS/TiO2 (0.15%) film against E. coli, S. enteritidis and S. aureus under UV light condition increased by 21.78%, 21.45%, and 26.44%, respectively, compared with the control. This study suggested that adding highly dispersible TiO2 nanoparticles is an effective method for improving the mechanical and antimicrobial properties of zein/CS films for various applications, such as medical and food packaging.
科研通智能强力驱动
Strongly Powered by AbleSci AI