低密度聚乙烯
纳米复合材料
聚丙烯
材料科学
聚乙烯
食品包装
复合数
聚合物
复合材料
复配
抗菌活性
化学工程
化学
食品科学
细菌
工程类
生物
遗传学
作者
Yumi Jo,Coralia V. Garcia,Seonghyuk Ko,Wooseok Lee,Gye Hwa Shin,Ji‐Yeob Choi,Se Jong Park,Jun Tae Kim
标识
DOI:10.1016/j.fbio.2018.03.008
摘要
Nanocomposite films were developed using masterbatches of two polymers, namely low-density polyethylene (LDPE) and polypropylene (PP) containing silver (Ag) nanoparticles, by melt compounding and melt extruding. The films became increasingly yellow as the Ag content increased. Morphological evaluation showed the effective incorporation of Ag in the polymers. The Ag/LDPE nanocomposite film showed a comparable strength to that of commercial LDPE, although stiffness increased at high Ag (240 mg/kg) concentration. The Ag/PP nanocomposite film showed enhanced mechanical properties compared to commercial PP, although high Ag content (290 mg/kg) also resulted in weakening. Both nanocomposite films were effective against E. coli and S. aureus at concentrations of 36 and 30 mg/kg Ag nanoparticles for Ag/LDPE and Ag/PP films, respectively, resulting in a > 99.9% decrease in the number of viable bacteria. The antibacterial effect was more marked on S. aureus. The results obtained indicate that the nanocomposite films produced show great potential for developing antibacterial food packaging.
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