Preparation of Polyethersulfone Ultrafiltration Tubur Membranes with Superior Properties

Jun Liu


Phase inversion via immersion precipitation was employed for PES tubular membrane preparation and using N,N-dimethylacetamide(DMAc) as solvent, PEG-400 as main constant additive. Through the experimental study we obtain a preparation process of PES tubular membrane with superior properties. Ethanol caused an increment in the flux at low coagulation bath temperature relative to the non-ethanol. And the low temperature of coagulation bath also improve membrane’s rejection and its influence was most important. Other conditions included that the casting solution temperature must not be too high (15? was best) and the membrane don’t be exposed to atmosphere in long time. The prepared membrane under this condition shows excellent performance on flux and retention. Test results show that the flux can be up to 160 L·m-2h-1 and the rejection can reach more than 97% (for ovalbvmin) under this condition. The flux was increased clearly compare to non-ethanol and high temperature.

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