Preparation and Properties of Acid Strengthened Hollow Fiber Membrane
In this paper,PES/PVDF strengthened hollow fiber membrane was prepared by phase inversion method with PVDF and PES as raw materials.The results showed that the introduction of PES can significantly improve water flux and retention rate of the membrane.In particular,when the mass fraction of PES was3wt%,the membrane had the best comprehensive properties,with a water flux of 78.84L/(h·m2)and a retention rate of 95%.Compared with the traditional monomer PVDF membrane,the water flux increased about 42.75%and the retention in-creased 10.46%.The maximum tensile load of PES/PVDF strengthened hollow fiber membrane was 120.38 N after soaking in HCl solution of 7mol/L for 8 months,which decreased by 10.3%,elongation at break was 19.88%,increased by 16.2%,retention rate was 99%,increased by 4.2%,which demonstrated a quite well anti acid performance.