Abstract:

In order to obtain membranes with better performance for air quality detection, a polyether sulfone (PES) membrane was coated on the fusible nonwoven fabric by combining. The influence of PES mass fraction, additive TiO2, condition bath temperature, and film thickness on the structure and properties of the membranes was investigated. With th mass fraction of PVP fixed at 10% and PES increased from 6% to 20%, the permeability of the composite membranes reduced from 119.65 L/(m2?s) to 12.04 L/(m2?s), the  filtration efficiency increased from 67.06% to 92.38%, and the breaking strength increases first and then decreases. With the increase of the dosage of TiO2 as additive, the permeability of the composite membranes increases first and then decreases, filtration efficiency rises from 82.73% to 87.10% and the breaking strength increases. As the coagulation bath temperature increased, the permeability of the composite membrane changed from 13.61 L/(m2?s) to 34.22 L/(m2?s) , filtration efficiency changed from 90.62% to 83.47% and the breaking strength increases significantly. With the composite membrane thickess increases, the permeability changes from 34.5 L/(m2?s) to 28.5 L/(m2?s), the filtration efficiency increases and the composite membrane improves.

Key words: polyether sulfone, nonwoven filter material, composite membrane, air filter performance