Superamphiphobic nanofibrous membranes for effective filtration of fine particles
Superamphiphobic nanofibrous membranes for effective filtration of fine particles
复制标题
DOI：
10.1016/j.jcis.2014.04.026
复制
发表时间：
2014-08-15
影响因子：
9.9
通讯作者：
Ding, Bin
中科院分区：
文献类型：
--
作者：
Wang, Na;Zhu, Zhigao;Ding, Bin
世界范围内对高能效和低成本方法的需求日益增加，这种方法可以提供具有高过滤性能和优异的防污染性能的先进的纳米纤维膜。在这里，我们报道了一种新型的合成氟化聚氨酯(FPU)修饰的纳米纤维膜，优化实现了石油和非石油气溶胶颗粒的过滤。在聚丙烯腈/聚氨酯(PAN/PU)复合膜中引入FPU，使其具有超疏水性，与水的接触角为154°，与油的接触角为151°。形态、表面润湿性、多孔结构和过滤性能可以通过调节溶液组成和分级结构来控制。此外，通过使用纤维直径和作用于目标颗粒的表面粗糙度的组合贡献，所制备的膜首次能够在一次操作中捕获一系列不同的石油气溶胶颗粒，过滤效率为99.9%。以超两亲纳米纤维膜的构建为例，这种介质的许多应用包括高效颗粒空气过滤器、超低渗透空气过滤器和呼吸保护设备。(C)2014 Elsevier Inc.保留所有权利。
The worldwide demands are rising for an energy-efficient and cost-effective approach that can provide advanced nanofibrous membranes with high filtration performance and superior antifouling properties. Here we report a novel synthesized fluorinated polyurethane (FPU) modified nanofibrous membrane optimized to achieve oil and non-oil aerosol particle filtration. By employing the FPU incorporation, the polyacrylonitrile/polyurethane (PAN/PU) composite membranes were endowed with superhydrophobicity with a water contact angle of 154 degrees and superoleophobicity with an oil contact angle of 151 degrees. Morphology, surface wettability, porous structure, and filtration performance could be manipulated by tuning the solution composition as well as the hierarchical structure. Furthermore, the as-prepared membranes can capture, for the first time, a range of different oil aerosol particles in a single-unit operation, with >99.9% filtration efficiency, by using the combined contribution of fiber diameter and surface roughness acting on the objective particles. Exemplified here by the construction of superamphiphobic nanofibrous membrane, numerous applications of this medium includes high efficiency particulate air filters, ultra-low penetration air filters, and respiratory protection equipment. (C) 2014 Elsevier Inc. All rights reserved.