To develop high-performance air filtration nano-fiber materials,the PMIA nano-fiber membrane was prepared by electro-spinning process with PMIA as the raw material,DMAc as the solvent and LiCl as the additives.The effects of spinning time,PMIA concentration,and spinning voltage on PMIA nano-fiber membrane's performance were investigated.The micro-structure,pore size,filtration performance,and stability were characterized and tested.The results show that the fiber distribution of PMIA nano-fiber membrane is uniform with a spinning time of 2.0 h,PMIA concentration of 12％and spinning voltage of 15 kV.The mean pore size is 2.43 μm,the filtration efficiency of the prepared PMIA nano-fiber membrane for PM2.5 is about 87.5％,with a filtration resistance of 13.3 Pa.Moreover,the PMIA nano-fiber membrane also shows good filtration stability under different working conditions.
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