Polyacrylonitrile (PAN) was used as raw material and N,N-dimethyl formamide (DMF) was employed as solvent to prepare spinning solution with different concentrations (8wt%,10wt% and 12wt%).PAN nanofibers were deposited on polypropylene (PP) melt-blown nonwovens by electrospinning.The composite fiber membranes with different thickness were obtained by changing the spinning time.The morphologies of PP and composite fiber membranes were observed by scanning electron microscope (SEM),and the thickness,pore diameter,permeability and filtration performance were characterized.The results show that the filtration performance of PP nonwoven fabric was obviously improved after the PAN nanofibers were deposited on the surface.Especially when the PAN solution with 8wt% mass fraction was spun for 2h,the composite fiber membrane exhibited the best filtration performance.When the air flow rate was 84L/min,the filtration efficiency for the particles with size of greater than or equal to 0.3μm was up to 95.762% and the pressure drop was only 85Pa.
Luo Lei, Zhu Chaojie, Wang Shifei, Chen Meiyu, Dang Xinyu, Sha Sha, Zhang Ruquan
. Preparation and filtration performance of electrospun PAN nanofiber composite membrane[J]. New Chemical Materials, 2021
, 49(6)
: 66
-69
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.06.015
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