Development of a fiber membrane with high filtration efficiency and thermal resistance for particulate matter removal

There has been a rapid increase in the standard of living and economic development, contributing to the rise of various environmental pollutants, such as PM, NO 2 , O 3 , CO, CO 2 , SO 2 , and VOCs. Particulate matter is primarily categorized into PM 2.5 and PM10. Prolonged exposure to high concentrations of air pollution and pathogens increases the risk of respiratory diseases. If air pollutants in hospitals can be filtered, indoor air quality can be improved. Therefore, electrospinning technology is used to blend polyimide (PI) and polyetherimide (PEI) to fabricate a polymer fiber membrane under varying operational factors, such as the PI/PEI ratio, flow rate, voltage, and spinning time, for air pollutant filtration testing. The optimal conditions—20 % of PI/PEI, a flow rate of 0.9 mL h -1 , voltage of 23 kV, and spinning time of 6 h-yielded a filtration efficiency of 91.86 % and a filtration quality of 0.0273 Pa -1 .