Graphene/Polyimide Nanofibrous Mat for High-Efficiency Filtration

Abstract

The development of novel nanofibrous filters has received much attention. Nanofibrous nonwoven mats are applicable in air filtration, but their structural characteristics lead to weak mechanical properties. By incorporating graphene with polyimide, we fabricated nanofibrous mats for air filtration. The results indicate that these mats are highly efficient (up to 99.1%) for air filtration and have strength improvement and thermal stability. These mats are expected to be applied for extreme conditions.

Preparation of porous polylactic acid nanofibers and application in non-electret high-efficiency filtration composites

“…Common brous lter materials mainly contain spun-bond nonwovens, melt-blown nonwovens, and needle-punched nonwovens. [12][13][14][15][16][17] Among these non-woven materials, melt-blown nonwovens are currently core materials for masks and respirators used for personal protection and indoor air purication because of their high porosity, small ber dimeter, large specic surface area and simple preparation process. Moreover, commercial melt-blown nonwovens used for air ltration are usually composed of electrically charged bers, which can improve the ltration efficiency of common meltblown nonwovens with respect to ne particles (#0.5 mm) due to the micro-scale ber diameter and relatively large pore size.…”

Fractal Dimensions of a Porous Concrete and Its Effect on the Concrete’s Strength

“…Hierarchical porous materials are now widely used for high-rate electrochemical capacitive energy storage [4], supercapacitors [5] and energy harvesting [6,7]. Nano/micro scale porous membranes have extremely high permeability and extremely small pressure drop [8][9][10][11], the diffusion process in a porous medium (e.g. water) has attracted much attention in the academic community, because the seemingly stochastic diffusion process is actually deterministic in a fractal space, making the impossible possible [12,13,14].…”

Is Graphene Always Effective in Reinforcing Composites? The Case of Highly Graphene-Modified Thermoplastic Nanofibers and Their Unfortunate Application in CFRP Laminates

“…The small dimensions of GRMs allow them to nanomodify even micro-and nanofibers, enhancing thermal [43] and electrical [44] conductivity, improving mechanical and thermomechanical performance [45,46], and adding other peculiar properties. Applications include sensors [47][48][49], electromagnetic shielded materials [50], supercapacitors [51], tissue engineering [52], photocatalysis [53], fuel cells [54], filtration [55], CO 2 capture [56], wastewater treatment [57,58], and oil/water separation [59].…”