Nanofibrous membrane of graphene oxide-in-polyacrylonitrile composite with low filtration resistance for the effective capture of PM2.5

Particulate matter (PM) pollution has become one of the most severe environmental issues because of its hazardous effects on human health. The development of a cost-effective and energy-efficient air filter is highly desirable. Nanofibrous membranes have been extensively studied for PM filtration owing to their high specific surface area and the slip effect of air flow on the surface. In this study, graphene oxide/polyacrylonitrile (GOPAN) composite nanofibrous membranes with an olive-like beads-on-a-string structure and with high porosity were controllably fabricated via an electrospinning method. The prepared GOPAN membranes were demonstrated to serve as air filters. The olive-like structure engendered by the GO expansion of the inter-fiber voids substantially reduced the pressure drop of the air filter. The PM2.5 removal efficiency of GOPAN membrane exhibited the highest efficiency (99.97%) with a low pressure drop (8 Pa). The significant enhancement of the air filter properties is attributed to the GO and the designed olive-like bead macrostructures. The GOPAN composite membranes developed in this work have a promising potential for the development and manufacture of a new generation of filter medium with enhanced filtration capacity and a low pressure drop for air purification and other commercial applications.

由于其对人体健康的有害影响，颗粒物（PM）污染已成为最严重的环境问题之一。所以非常需要开发一种具有成本效益和能量效率的空气过滤器。纳米纤维膜由于其高的比表面积和气流在表面上的滑动作用，已被广泛地用于PM过滤的研究。在这项研究中，通过静电纺丝法可控地制备了具有橄榄形串珠状结构且具有高孔隙率的氧化石墨烯/聚丙烯腈（GOPAN）复合纳米纤维膜，所制备的GOPAN膜被证明可以用作空气过滤器。通过纤维间空隙的GO膨胀产生的橄榄状结构大大降低了空气过滤器的压降。 GOPAN膜的PM2.5去除效率最高（99.97％），压降低（8 Pa）。空气滤清器性能的显着提高归因于GO和设计的橄榄状珠状宏观结构。在这项工作中开发的GOPAN复合膜在开发和制造新一代过滤介质方面具有广阔的潜力，该过滤介质具有更强的过滤能力和低压降，可用于空气净化和其他商业应用。

Published: 2018

Journal ：JOURNAL OF MEMBRANE SCIENCE

Impact Factor：7.484

Paper link:https://www.sciencedirect.com/science/article/abs/pii/S0376738817336153