"Nanofiber Air Filters with High-Temperature Stability for Efficient PM2.5 Removal from the Pollution Sources"

Rufan Zhang: Chong Liu, Po-Chun Hsu, Chaofan Zhang, Nian Liu, Jinsong Zhang, Hye Ryoung Lee, Yingying Lu, Yongcai Qiu, Steven Chu, and Yi Cui; Nano Letters, 05/11/16.

Additional Authors: Chong Liu, Po-Chun Hsu, Chaofan Zhang, Nian Liu, Jinsong Zhang, Hye Ryoung Lee, Yingying Lu, Yongcai Qiu, Steven Chu, and Yi Cui

Abstract:

Abstract Image

Here, we developed high-efficiency (>99.5%) polyimide-nanofiber air filters for the high temperature PM2.5 removal. The polyimide nanofibers exhibited high thermal stability, and the PM2.5 removal efficiency was kept unchanged when temperature ranged from 25–370 °C. These filters had high air flux with very low pressure drop. They could continuously work for >120 h for PM2.5 index >300. A field-test showed that they could effectively remove >99.5% PM particles from car exhaust at high temperature.