Escriba Flores Armando A, de Almeida Daniela Sanches, Aguiar Monica Lopes, Cava Carlos Eduardo
Federal University of Technology - Paraná, Av. Dos Pioneiros, 3131, Londrina, PR 86036-370, Brazil.
Federal University of São Carlos, Rod. Washington Luiz, km 235, SP310, São Carlos, SP 13565-905, Brazil.
ACS Omega. 2024 Aug 24;9(36):37771-37779. doi: 10.1021/acsomega.4c03628. eCollection 2024 Sep 10.
This study presents a novel approach for creating an effective air filtration medium using electrospun nanofibers comprised of poly(vinyl chloride) (PVC), poly(vinylpyrrolidone) (PVP), and impregnated with multiwall carbon nanotubes (MWCNTs). The membrane production was optimized using an experimental design methodology, resulting in a hydrophobic membrane that exhibits excellent dispersion of MWCNTs. Scanning electron microscopy images illustrate the nanofibers' morphology, featuring an average diameter of approximately 240 nm, minimal bead formation, and optimal MWCNT dispersion. Air filtration tests conducted with NaCl nanoparticles (7-300 nm) demonstrated superior permeability (10 m) and minimal pressure drop (approximately 780 Pa at a 5 LPM airflow rate) compared to other electrospun materials. Both MWCNT-impregnated samples and individual PVC/PVP nanofibers exhibited filtration efficiencies nearing 96%. These results underscore the potential of this developed material for air filtration, particularly in indoor environments, where MWCNTs effectively adsorb and maintain low levels of gaseous and particulate pollutants. This study emphasizes the design, optimization, and comprehensive performance evaluation of PVC/PVP/MWCNT nanofibers, showcasing significant advancements in filtration efficiency with high flux. The findings suggest promising applications for this composite material in advanced air purification systems.
本研究提出了一种新颖的方法，用于制造一种有效的空气过滤介质，该介质使用由聚氯乙烯（PVC）、聚乙烯吡咯烷酮（PVP）组成并浸渍有多壁碳纳米管（MWCNT）的电纺纳米纤维。使用实验设计方法对膜的生产进行了优化，得到了一种疏水性膜，该膜显示出MWCNT的优异分散性。扫描电子显微镜图像展示了纳米纤维的形态，其平均直径约为240nm，珠粒形成极少，且MWCNT分散性最佳。用氯化钠纳米颗粒（7 - 300nm）进行的空气过滤测试表明，与其他电纺材料相比，该材料具有更高的渗透性（10m）和最小的压降（在5LPM气流速率下约为780Pa）。浸渍有MWCNT的样品和单独的PVC/PVP纳米纤维的过滤效率均接近96%。这些结果强调了这种开发材料在空气过滤方面的潜力，特别是在室内环境中，MWCNT能有效吸附并维持低水平的气态和颗粒污染物。本研究强调了PVC/PVP/MWCNT纳米纤维的设计、优化和综合性能评估，展示了在高通量下过滤效率的显著进步。研究结果表明这种复合材料在先进空气净化系统中有广阔的应用前景。
