Upcycled Polyvinyl Chloride (PVC) Electrospun Nanofibers from Waste PVC-Based Materials for Water Treatment
Upcycled Polyvinyl Chloride (PVC) Electrospun Nanofibers from Waste PVC-Based Materials for Water Treatment
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DOI：
10.1021/acsaenm.3c00245
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发表时间：
2023-06
期刊：
影响因子：
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通讯作者：
Atta Ur Razzaq;D. J. McEachern;P. Rupar;Phoebe R. Willis;S. Mahmoodi;M. Esfahani
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文献类型：
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作者：
Atta Ur Razzaq;D. J. McEachern;P. Rupar;Phoebe R. Willis;S. Mahmoodi;M. Esfahani
近几十年来，聚氯乙烯(PVC)在工业和家庭中的使用增加，导致聚氯乙烯废物污染激增，这就要求开发从环境中去除废聚氯乙烯的解决方案。我们报告了将废旧材料转化为高附加值产品，将以聚氯乙烯为基础的产品升级为电纺(ES)纤维(垫)。作为两种常见的聚氯乙烯产品，废旧聚氯乙烯管材和废旧聚氯乙烯池浮子被回收到ES纤维中进行水处理。研究了再生纤维的制备工艺和纤维特性，如形态、表面电荷和机械强度等，并与用研究级(RG)聚氯乙烯(PVC)粉生产的同类纤维进行了比较。此外，还考察了废旧聚氯乙烯中添加碳酸钙等添加剂对再生纤维物化性能的影响。结果表明，废旧聚氯乙烯与RG-PVC的等量纤维相比，再生纤维具有相似或更好的性能，因此回收废旧聚氯乙烯为ES纤维是可行的。最后，对再生纤维去除水中染料的性能进行了评价。废旧聚氯乙烯管材和水池漂浮物再生纤维对水中亚甲基蓝的去除效果优于RG聚氯乙烯纤维，去除效率可达97%以上。此外，回收的聚氯乙烯ES纤维在5次吸附-解吸循环后，可重复使用80%以上。
In recent decades, the increased use of polyvinyl chloride (PVC) in industries and households has led to a surge in PVC waste pollution, which mandates developing solutions for the removal of waste PVC from the environment. We report upcycling, the conversion of waste material to a high-value-added product, of PVC-based products to electrospun (ES) fibers (mats). As two common PVC products, waste PVC pipe and waste PVC pool float were upcycled to ES fibers for water treatment. The fabrication process and fiber characteristics, such as morphology, surface charge, and mechanical strength of upcycled fibers, were studied and compared with the same fibers fabricated using research-grade (RG) PVC (commercial PVC powder). In addition, the effect of additives such as calcium carbonate in PVC waste products on the physicochemical properties of upcycled fibers was evaluated. The results showed that upcycling of waste PVC to ES fibers is feasible since the upcycled fibers showed similar or superior properties compared to their equivalent fibers from RG-PVC. Finally, the performance of upcycled fibers on the removal of dyes from the water was evaluated. The upcycled fibers from waste PVC pipes and pool float outperformed the RG PVC fibers in removing methylene blue from water by showing more than 97% removal efficiency. In addition, the upcycled PVC ES fibers showed more than 80% reusability after five adsorption–desorption cycles.