Hollow fiber polysulfate ultrafiltration membranes were prepared using polysulfate(PSE)resin as raw material,dimethylacetamide(DM Ac)as solvent,and lithium halide(LiF,LiBr,LiCl,LiI)as modified additives,and PSE ultrafiltration membranes with high water flux and high anti-pollution were obtained by utilizing solvation effects of halogen ions and DMAc.The experimental results showed that the hydrophilicity,water flux,and anti-pollution resistance rose with the increase of the atomic number of halogen ions.When the additive was lithium iodide(LiI),the maximum water flux was 216.99 L/(m2·h),which was twice as much as that of the control group without additive(108.41 L/(m2·h)).And the retention rate of bovine serum albumin(BSA)was 98.19％,which is of profound significance for the preparation of membranes with high permeability and high contamination resistance.
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