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基于天然橡胶和回收甘蔗渣废料的生态复合材料的生产，将被用作一种食品接触材料。

Production of eco composites based on natural rubber and recycled sugarcane bagasse waste to be utilised as a type of food contact.

机构信息

Microwave Physics and Dielectrics Department, Physics Research Institute, National Research Centre, Giza, Egypt.

Polymers and Pigments Department, Chemical Industrial Research Institute, National Research Centre, Giza, Egypt.

出版信息

Sci Rep. 2024 Oct 3;14(1):22996. doi: 10.1038/s41598-024-73296-w.

DOI:10.1038/s41598-024-73296-w
PMID:39362970
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11450146/
Abstract

Natural fibres are abundant, renewable, and biodegradable, which has inspired numerous academics worldwide to investigate their possible applications in various industrial fields. The food packaging sector is seeking bio-based and biodegradable substitutes to increase sustainability. In this study, new composites were prepared from natural rubber (NR) and sugarcane bagasse fibres (SCB) with different concentrations of SCB (0, 2.5, 5, 10 &20 phr). The effect of SCB on the properties of natural rubber was studied before and after the alkaline treatment of the fibres. The biocomposites are characterized using Fourier transmission infrared spectroscopy, thermogravimetric analysis, scanning electron microscope, transmission electron microscope, and dielectric measurements in addition to rheological and mechanical analysis. The overall migration test for biocomposites loaded with 20phr SCB was performed to assess the biocomposite's safety as food contact materials. The study's results indicated that, adding SCB improved the conductivity, tensile strength, and elongation at break of natural rubber. Alkaline treatment strengthened the bonding between the filler and matrix and improved biocomposites' thermal dielectric and mechanical properties. The overall migration test indicated that the alkaline treatment increased the overall migration to simulants. Accordingly, alkaline-treated NR-SCB biocomposites are effective eco-friendly food packaging candidates for certain types of food such as aqueous non-acidic products.

摘要

天然纤维丰富、可再生且可生物降解，这激发了全球众多学者研究其在各个工业领域的潜在应用。食品包装行业正在寻求生物基和可生物降解的替代品以提高可持续性。本研究采用不同浓度的甘蔗渣纤维（0、2.5、5、10 和 20 份）制备了天然橡胶（NR）和甘蔗渣纤维（SCB）的新型复合材料。研究了纤维的碱性处理前后 SCB 对天然橡胶性能的影响。采用傅里叶变换红外光谱、热重分析、扫描电子显微镜、透射电子显微镜和介电测量以及流变和力学分析对生物复合材料进行了表征。对添加 20phr SCB 的生物复合材料进行了整体迁移试验，以评估生物复合材料作为食品接触材料的安全性。研究结果表明，添加 SCB 提高了天然橡胶的导电性、拉伸强度和断裂伸长率。碱性处理增强了填料与基体之间的结合，提高了生物复合材料的热介电和力学性能。整体迁移试验表明，碱性处理增加了对模拟物的整体迁移。因此，碱性处理后的 NR-SCB 生物复合材料是某些类型食品（如水性非酸性产品）的有效环保型食品包装候选材料。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de5/11450146/fcb59a0bb473/41598_2024_73296_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de5/11450146/0c7eccc01274/41598_2024_73296_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de5/11450146/dad6bc8e8a6f/41598_2024_73296_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de5/11450146/55c6a79ed517/41598_2024_73296_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de5/11450146/313f0d8a13eb/41598_2024_73296_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de5/11450146/8b778f97f6d9/41598_2024_73296_Fig10_HTML.jpg
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