Characterization and quality assessment of recycled post-consumption poly(ethylene terephthalate) (PET)
Characterization and quality assessment of recycled post-consumption poly(ethylene terephthalate) (PET)
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再生消费后聚对苯二甲酸乙二醇酯 (PET) 的表征和质量评估
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
E. Ammar
中科院分区：
文献类型：
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作者：
F. Masmoudi;F. Fenouillot;A. Mehri;M. Jaziri;E. Ammar
本研究将回收后的聚对苯二甲酸乙二醇酯(PET)薄片作为生产食品包装的可能原料进行了研究。在220℃加热1h后，进行蒸煮阶段作为对照试验，以评估产品的质量。用1H-核磁共振、FT-IR、DSC/TGA分析、粘度指数(VI)和痕量金属分析对不同样品进行了表征。结果表明，回收后的PET片材除部分片材颜色变黄外，其各项性能基本符合PET标准。随后，进行了一项补充研究，以评估该材料是否可能重复用于食品包装。为此，进行了流变学、热学和力学表征。对未回收和回收的片材进行了对比研究，结果表明，回收对聚酯的流变性能有一定的影响，但对其热性能和力学性能影响不大。由此推断，除食品外，食用后的PET薄片还可以作为包装材料重复使用。
In the present study, the recycled post-consumption polyethylene terephthalate (PET) flakes were investigated as possible raw materials for the production of food packaging. After heating at 220 °C for 1 h, a steaming stage was conducted as a control test to assess the quality of the product. Different samples were characterized by 1H-NMR, FT-IR, DSC/TGA analysis, viscosity index (VI), and trace metals analysis. The results showed that the recycled post-consumed PET flakes’ properties were generally conform to the standard norms of PET except the color of some flakes turned to yellow. Subsequently, a complementary study was undertaken to assess whether the material could be possibly reused for food packaging. For this purpose, rheological, thermal, and mechanical characterizations were performed. The results of the comparative study between the virgin and the recycled PET flakes concluded that the PET recycling affected the rheological properties but did not have any significant effect on their thermal and mechanical characteristics. Hence, it was deduced that the post-consumed PET flakes could be reused as a packaging material except food products.