Preparation of low-density polyethylene- and poly (lactide)/poly (butylene adipate-co-terephthalate)-based antibacterial films integrated with elemental sulfur and sulfur nanoparticles,Packaging Technology and Science

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Preparation of low-density polyethylene- and poly (lactide)/poly (butylene adipate-co-terephthalate)-based antibacterial films integrated with elemental sulfur and sulfur nanoparticles
Packaging Technology and Science ( IF 2.8 ) Pub Date : 2021-04-27 , DOI: 10.1002/pts.2577
Se‐Mi Kim ₁ , Swarup Roy ₁ , Ki Sun Yoon ₁ , Jong‐Whan Rhim ₁

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Antibacterial low-density polyethylene (LDPE)- and poly (lactide)/poly (butylene adipate-co-terephthalate) (PLA/PBAT)-based films incorporated with elemental sulfur (ES) and sulfur nanoparticles (SNPs) were prepared using a blow extrusion method for food packaging applications. Flexible and free-standing films were manufactured using an industrial processing method without any modification. The films were characterized using ultraviolet (UV)–visible spectroscopy, field emission scanning electron microscope (FESEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and thermogravimetric analysis (TGA). Also, film properties include optical, mechanical, surface hydrophobicity, thermal stability and antibacterial activity. The addition of ES and SNP significantly reduced the light transmittance (both UV and visible light) of LDPE- and PLA/PBAT-based films and slightly reduced mechanical properties but did not affect thermal stability. The ES- and SNP-added films showed apparent antibacterial activity against the Gram-positive foodborne pathogenic bacteria (Listeria monocytogenes). In general, SNP showed superior film properties and antibacterial properties compared to ES, but ES also showed comparable properties as SNP. Antibacterial LDPE- and PLA/PBAT-based films can be produced on an industrial scale and used in the packaging of refrigerated foods susceptible to L. monocytogenes contamination.

中文翻译：

低密度聚乙烯和聚（丙交酯）/聚（己二酸丁二醇酯-共对苯二甲酸酯）基抗菌膜的制备与元素硫和硫纳米粒子集成

使用吹塑法制备了掺入元素硫 (ES) 和硫纳米粒子 (SNP) 的抗菌低密度聚乙烯 (LDPE) 和聚（丙交酯）/聚（己二酸丁二醇酯-共-对苯二甲酸酯）（PLA/PBAT）基薄膜食品包装应用的挤出方法。柔性和独立式薄膜是使用工业加工方法制造的，无需任何修改。使用紫外 (UV)-可见光光谱、场发射扫描电子显微镜 (FESEM)、X 射线衍射 (XRD)、傅里叶变换红外 (FTIR) 和热重分析 (TGA) 对薄膜进行表征。此外，薄膜特性包括光学、机械、表面疏水性、热稳定性和抗菌活性。ES 和 SNP 的添加显着降低了 LDPE 和 PLA/PBAT 基薄膜的透光率（紫外线和可见光），并略微降低了机械性能，但不影响热稳定性。添加 ES 和 SNP 的薄膜对革兰氏阳性食源性致病菌显示出明显的抗菌活性。单核细胞增生李斯特菌）。一般来说，与 ES 相比，SNP 显示出优异的薄膜特性和抗菌特性，但 ES 也显示出与 SNP 相当的特性。基于 LDPE 和 PLA/PBAT 的抗菌薄膜可以工业规模生产，用于包装易受单核细胞增生李斯特菌污染的冷藏食品。

更新日期：2021-04-27

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