Polylactide films modified with glass microspheres - morphology and properties

IF 8.5 1区农林科学 Q1 FOOD SCIENCE & TECHNOLOGY

Food Packaging and Shelf Life Pub Date : 2024-09-21 DOI:10.1016/j.fpsl.2024.101356

引用次数: 0

Abstract

The paper presents studies on the modification of polylactide (PLA) film with various amounts of glass microspheres (GMS). PLA films containing from 5 to 25 wt% GMS were prepared by cast film extrusion. Comparison of changes occurring in optical, mechanical, tribological and barrier properties as well as in structure of the modified films was the objective of the investigations carried out. It was found that the greatest changes were observed after adding the smallest amount of GMS (5 %) to PLA, while larger amounts of GMS changed the properties of the PLA films to a lesser extent. The modified PLA films showed less transparency, less gloss, and a dark color, as well as very good mechanical parameters. The studied films were also characterized by high roughness, good adhesion of the filler to the PLA matrix, slight anisotropy, and almost unaltered water vapor permeability. Therefore, these films can be valuable engineering materials in many applications, including packaging.

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用玻璃微球改性的聚乳酸薄膜--形态和性能

本文介绍了用不同量的玻璃微球（GMS）对聚乳酸（PLA）薄膜进行改性的研究。通过流延薄膜挤压法制备了含 5 至 25 wt% GMS 的聚乳酸薄膜。研究的目的是比较改性薄膜在光学、机械、摩擦学和阻隔性以及结构方面发生的变化。研究发现，在聚乳酸中添加最小量的 GMS（5%）后，聚乳酸薄膜的性能变化最大，而添加更大量的 GMS 后，聚乳酸薄膜的性能变化较小。改性后的聚乳酸薄膜透明度较低、光泽度较低、颜色较深，而且机械参数非常好。所研究的薄膜还具有粗糙度高、填料与聚乳酸基体的粘附性好、各向异性小以及水蒸气渗透性几乎不变等特点。因此，这些薄膜在包括包装在内的许多应用领域中都可以成为有价值的工程材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Food Packaging and Shelf Life Agricultural and Biological Sciences-Food Science

CiteScore

14.00

自引率

8.80%

发文量

214

审稿时长

70 days

期刊介绍： Food packaging is crucial for preserving food integrity throughout the distribution chain. It safeguards against contamination by physical, chemical, and biological agents, ensuring the safety and quality of processed foods. The evolution of novel food packaging, including modified atmosphere and active packaging, has extended shelf life, enhancing convenience for consumers. Shelf life, the duration a perishable item remains suitable for sale, use, or consumption, is intricately linked with food packaging, emphasizing its role in maintaining product quality and safety.