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/m3. 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.

中文翻译：

---

耐高温聚磺酰胺/聚丙烯腈复合纳米纤维高效过滤PM2.5

摘要 聚合物纳米纤维在 PM2.5 过滤方面具有巨大潜力，但由于其结构脆弱，通常不能直接从高温源中去除颗粒物 (PM)。聚磺酰胺（PSA）/聚丙烯腈（PAN）复合纳米纤维可以承受高达400°C的温度，通过简单的静电纺丝方法制造。PSA 和 PAN 之间的相互作用定义了纳米纤维在受热时产生的微结构和形状。PSA/PAN 复合纳米纤维对 PM2.5 的去除效率超过 99.7%。更重要的是，即使在 100 °C 到 400 °C 的温度范围内加热纳米纤维后，如此高的 PM2.5 去除效率也能很好地保持。纳米纤维空气过滤器可在PM2.5浓度接近380 μg/m3的环境中连续工作100 h。PSA/PAN 纳米纤维良好的热稳定性和高过滤效率使其在各种应用中具有吸引力，尤其是在需要耐高温聚合物组分时。