Facile strategy to prepare polyimide nanofiber assembled aerogel for effective airborne particles filtration.

Polyimide nanofiber (PINF) aerogel materials have received extensive attention as heat insulation, sensors and filtration media due to their excellent thermodynamic properties and unique porous structure. However, PINF must be difficult to disperse in organic solvents (dioxane or dimethyl sulfoxide) and dimensional instability has been regarded as issues that limits the preparation of PINF aerogels, especially in the water. So, it is of great significance to prepare polyimide aerogels with stable structure using water as a dispersant.

Hyper-Cross-Linked Polymers-Derived Porous Tubular Carbon Nanofibers@TiO toward a Wide-Band and Lightweight Microwave Absorbent at a Low Loading Content.

An enormous challenge exists in the achievement of one-dimensional (1D) dielectric carbon composite high-performance microwave absorbents at a low filling ratio. Porous/core-shell dual microstructures have been considered as the potential candidate for designing remarkable microwave absorbers with strong absorption and wide band. Herein, novel multiple-structured tubular carbon nanofibers@TiO (TCNFs@TiO) hybrids were constructed via the sequential steps of hydrolysis and pyrolysis.