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利用回收聚对苯二甲酸乙二酯合成新型机械性能改善的聚乙烯吡咯烷酮复合纳米纤维

The Use of Recycled PET for the Synthesis of New Mechanically Improved PVP Composite Nanofibers.

作者信息

Gallardo-Sánchez Manuel A, Chinchillas-Chinchillas Manuel J, Gaxiola Alberto, Alvarado-Beltrán Clemente G, Hurtado-Macías Abel, Orozco-Carmona Víctor M, Almaral-Sánchez Jorge L, Sepúlveda-Guzmán Selene, Castro-Beltrán Andrés

机构信息

Universidad de Guadalajara, Centro Universitario de Ciencias Exactas e Ingenierías, Guadalajara C.P. 44430, Jalisco, Mexico.

Universidad Autónoma de Occidente (UAdeO), Unidad Regional Guasave, Departamento de Ingeniería y Tecnología, Los Mochis 81048, Sinaloa, Mexico.

出版信息

Polymers (Basel). 2022 Jul 16;14(14):2882. doi: 10.3390/polym14142882.

DOI:10.3390/polym14142882
PMID:35890658
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9324248/
Abstract

Polyethylene terephthalate (PET) waste has become a major challenge for the conservation of the environment due to difficult degradation. For this reason, it is important to develop new recycling strategies for reusing this waste. In this work, the electrospinning technique was used to synthesize composite nanofibers of polyvinylpyrrolidone (PVP), recycling PET (RPET) that was obtained from the chemical recycling of postconsumer PET with glycolysis and styrene (ST) as a crosslinking agent. The polymer solutions were analyzed by viscosity and frequency sweeping, while the composite nanofibers were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis/differential scanning calorimetry (TGA/DSC), and nanoindentation to compare their properties. The PVP nanofibers presented an average diameter of 257 nm; the RPET/PVP and RPET/PVP/ST composite nanofibers had average diameters of 361 nm and 394 nm, respectively; and the modulus of elasticity and hardness of the RPET/PVP/ST composite nanofibers were 29 and 20 times larger, respectively, than those of the PVP nanofibers. With the synthesis of these composite nanofibers, a new approach to PET recycling is presented.

摘要

由于聚对苯二甲酸乙二酯（PET）废弃物难以降解，已成为环境保护面临的一项重大挑战。因此，开发新的回收策略以再利用这种废弃物至关重要。在本研究中，采用静电纺丝技术合成了聚乙烯吡咯烷酮（PVP）复合纳米纤维，其中回收PET（RPET）是通过对消费后PET进行化学回收，采用乙二醇解反应并以苯乙烯（ST）作为交联剂而获得的。通过粘度和频率扫描对聚合物溶液进行分析，同时利用扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、热重分析/差示扫描量热法（TGA/DSC）以及纳米压痕对复合纳米纤维进行表征，以比较它们的性能。PVP纳米纤维的平均直径为257nm；RPET/PVP和RPET/PVP/ST复合纳米纤维的平均直径分别为361nm和394nm；并且RPET/PVP/ST复合纳米纤维的弹性模量和硬度分别比PVP纳米纤维大29倍和20倍。通过合成这些复合纳米纤维，提出了一种PET回收利用的新方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/6aa06c9622cf/polymers-14-02882-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/ecbedf0337db/polymers-14-02882-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/29c09cd8d081/polymers-14-02882-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/7bb6aeeb4f2d/polymers-14-02882-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/e33bf75d34f4/polymers-14-02882-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/76fa6be14028/polymers-14-02882-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/6aa06c9622cf/polymers-14-02882-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/ecbedf0337db/polymers-14-02882-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/29c09cd8d081/polymers-14-02882-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/7bb6aeeb4f2d/polymers-14-02882-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/e33bf75d34f4/polymers-14-02882-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/76fa6be14028/polymers-14-02882-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9230/9324248/6aa06c9622cf/polymers-14-02882-g006.jpg

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