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