A Versatile, Highly-effective Nanofibrous Separation Membrane
Although a wide range of fibrous filters available for diverse filtration tasks to separate solid or oil particles from gas or liquid medium, a single filter seldom shows versatile separation capability to perform multi-separation tasks to separate both type of particles from different media. Herein, we report a novel nanofibrous membrane that can separate oil/water emulsions (e.g. efficiency over 99.9%) at a flux as high as 4082 L m-2 h-1 and oil mist aerosol (efficiency 99.98% for oil droplet size ~330 nm), solid aerosol particles from air (efficiency 85~99%) and micro-sized solid particles from water (efficiency>95%). The fibrous membrane is reusable to accomplish cross-medium filtration tasks. Such versatile, highly efficient separation capability is originated from the fine fibrous structure and an amphibious superhydrophilic-superoleophobic surface feature. It may be useful for development of advanced technology for various environmental protection applications.