Blend of cassava starch and high-density polyethylene with green tea for food packaging

Q2 Materials Science

Polymers from Renewable Resources Pub Date : 2020-02-01 DOI:10.1177/2041247920952641

Cassiano MN Romagnolli, Gabriela P. Leite, Tiago Rodrigues, C. L. Morelli

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引用次数: 14

Abstract

Plastic packagings are widely used for several food products. Considering the relatively short service lifetime of this application, it is important to perceive in the search of eco-friendly alternatives to this market, such as polymers from renewable sources, as thermoplastic starch and “green” polyethylene. The incorporation of an antibacterial agent to the packaging can extend food shelf life. Camellia sinensis is a plant with known antibacterial properties used in the preparation of “green tea.” In the present work, green tea was incorporated to a blend of cassava thermoplastic starch and high-density polyethylene (HDPE) by melt extrusion, aiming application as active packaging. Films were obtained by thermopressing and characterized through infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and tensile tests. Their antibacterial properties were evaluated against Staphylococcus aureus and Escherichia coli. The results indicated that the material developed has potential for food packaging applications. Moreover, the methodology applied for green tea incorporation in the Starch/HDPE films can be extended for many extracts from natural components, contributing to the advancement of research in the development of active packaging for food products. To the best of our knowledge, no previous work studied the properties of starch/HDPE blend with green tea.

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木薯淀粉和高密度聚乙烯与绿茶的混合食品包装

塑料包装广泛用于几种食品。考虑到这种应用的使用寿命相对较短，在寻找这个市场的环保替代品时，重要的是要认识到这一点，例如来自可再生资源的聚合物，如热塑性淀粉和“绿色”聚乙烯。在包装中掺入抗菌剂可以延长食品的保质期。茶树是一种已知的抗菌植物，用于制备“绿茶”。在本工作中，通过熔融挤出将绿茶掺入木薯热塑性淀粉和高密度聚乙烯(HDPE)的共混物中，旨在应用于活性包装。采用热压法制备薄膜，并通过红外光谱、热重分析、扫描电镜和拉伸试验对薄膜进行了表征。研究了其对金黄色葡萄球菌和大肠杆菌的抑菌性能。结果表明，该材料具有食品包装应用的潜力。此外，将绿茶掺入淀粉/HDPE薄膜的方法可以扩展到许多天然成分的提取物中，有助于促进食品活性包装开发的研究。据我们所知，以前没有研究过淀粉/HDPE与绿茶混合的性质。

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来源期刊

Polymers from Renewable Resources Materials Science-Polymers and Plastics

CiteScore

3.50

自引率

0.00%

发文量

期刊介绍： Polymers from Renewable Resources, launched in 2010, publishes leading peer reviewed research that is focused on the development of renewable polymers and their application in the production of industrial, consumer, and medical products. The progressive decline of fossil resources, together with the ongoing increases in oil prices, has initiated an increase in the search for alternatives based on renewable resources for the production of energy. The prevalence of petroleum and carbon based chemistry for the production of organic chemical goods has generated a variety of initiatives aimed at replacing fossil sources with renewable counterparts. In particular, major efforts are being conducted in polymer science and technology to prepare macromolecular materials based on renewable resources. Also gaining momentum is the utilisation of vegetable biomass either by the separation of its components and their development or after suitable chemical modification. This journal is a valuable addition to academic, research and industrial libraries, research institutions dealing with the use of natural resources and materials science and industrial laboratories concerned with polymer science.