Polypropylene/Polyvinyl Alcohol/Metal-Organic Framework-Based Melt-Blown Electrospun Composite Membranes for Highly Efficient Filtration of PM2.5

Particulate matter 2.5 (PM2.5) has become a public hazard to people's lives and health. Traditional melt-blown membranes cannot filter dangerous particles due to their limited diameter, and ultra-fine electrospinning fibers are vulnerable to external forces. Therefore, creating highly efficient air filters by using an innovative technique and structure has become necessary. In this study, a combination of polypropylene (PP) melt-blown and polyvinyl alcohol (PVA)/zeolite imidazole frameworks-8 (ZIF-8) electrospinning technique is employed to construct a PP/PVA/ZIF-8 membrane with a hierarchical fibrous structure. The synergistic effect of hierarchical fibrous structure and ZIF-8 effectively captures PM2.5. The PP/PVA composite membrane loaded with 2.5% loading ZIF-8 has an average filtration efficacy reaching as high as 96.5% for PM2.5 and quality factor (Q(f)) of 0.099 Pa-1. The resultant membrane resists 33.34 N tensile strength and has a low pressure drop, excellent filtration efficiency, and mechanical strength. This work presents a facile preparation method that is suitable for mass production and the application of membranes to be used as air filters for highly efficient filtration of PM2.5.

颗粒物2.5（PM2.5）已成为危害人们生命和健康的重要因素。传统的熔喷膜由于直径有限而无法过滤危险颗粒，超细电纺纤维易受外力作用。因此，通过使用创新的技术和结构来制造高效的空气过滤器已经变得必要。在这项研究中，采用聚丙烯（PP）熔喷和聚乙烯醇（PVA）/沸石咪唑骨架8（ZIF-8）电纺技术的组合来构建具有分层纤维的PP / PVA / ZIF-8膜结构体。分层纤维结构和ZIF-8的协同作用可有效捕获PM2.5。负载2.5％ZIF-8的PP / PVA复合膜的平均过滤效率对PM2.5高达96.5％，质量因子（Q（f））为0.099 Pa-1。所得的膜具有33.34N的抗张强度，并且具有低的压降，优异的过滤效率和机械强度。这项工作提出了一种简便的制备方法，该方法适用于大规模生产和应用膜作为空气过滤器，以高效过滤PM2.5。

Published: 2020

Journal ：Nanomaterials and Nanotechnology

Impact Factor：2.022

Paper link: https://www.mdpi.com/2079-4991/10/10/2025