High-temperature bearable polysulfonamide/polyacrylonitrile composite nanofibers for high-efficiency PM2.5 filtration. (February 2021)

• Record Type: Journal Article
• Authors: Zhang, Andong; Li, Heping; Zhang, Aohua; Zhou, Jun; Yan, Youwei
• Is Part Of: Composites communications. Volume 23(2021)
• Publication Date: 2021-02
• Subjects: Air filter -- PSA/PAN Composite nanofibers -- High temperature -- Electrospinning
• DOI: 10.1016/j.coco.2020.100582
• Languages: English
• ISSNs: 2452-2139

Abstract

Abstract: Polymer nanofibers have a great potential in PM2.5 filtration, but they generally cannot remove particulate matter (PM) particles directly from high-temperature sources due to their vulnerable structure. Polysulfonamide (PSA)/polyacrylonitrile (PAN) composite nanofibers that can withstand a temperature up to 400 °C, were fabricated by a simple electrospinning method. The interactions between PSA and PAN defined the resulting microarchitecture and shape of the nanofibers when suffering heating. The PSA/PAN composite nanofibers exhibited above 99.7% removal efficiency for the PM2.5 . More importantly, such a high PM2.5 removal efficiency was well retained even after heating the nanofibers at temperatures ranging between 100 °C and 400 °C. The nanofiber air filter could continuously work for 100 h in an environment with the concentration of PM2.5 approaching 380 μg/m 3 . The good thermal stability and high filtration efficiency of PSA/PAN nanofibers make them attractive in various applications, especially when high-temperature bearable polymer components are needed. Highlights: High-temperature bearable PSA/PAN nanofibers was successfully fabricated. The configuration of PSA/PAN nanofibers was well retained even calcined at 400 °C. The PSA/PAN nanofibers achieved 99.8% removal efficiency for the PM2.5 . After calcined at 400 °C, the efficiency of PSA/PAN air filter still reached 99.7%. PSA/PAN filter has great potential to be used in high-temperature filtration field.