State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
College of Textiles, Donghua University, Shanghai 201620, China.
J Colloid Interface Sci. 2014 Aug 15;428:41-8. doi: 10.1016/j.jcis.2014.04.026. Epub 2014 Apr 24.
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° and superoleophobicity with an oil contact angle of 151°. 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.
全球对高效节能且经济实用的方法的需求日益增长，这种方法可以提供具有先进过滤性能和卓越抗污染性能的纳米纤维膜。在这里，我们报告了一种新型合成的含氟聚氨酯（FPU）改性纳米纤维膜，该膜经过优化，可实现油和气溶胶粒子的过滤。通过引入 FPU，聚丙烯腈/聚氨酯（PAN/PU）复合膜具有超疏水性，水接触角为 154°，超疏油性，油接触角为 151°。通过调整溶液组成和分层结构，可以控制形态、表面润湿性、多孔结构和过滤性能。此外，所制备的膜可以在单次操作中首次捕获一系列不同的油气溶胶颗粒，过滤效率>99.9%，这是通过纤维直径和表面粗糙度对目标颗粒的共同作用实现的。在这里，通过构建超双疏纳米纤维膜为例，这种介质的许多应用包括高效微粒空气过滤器、超低渗透空气过滤器和呼吸保护设备。
