Abstract:

In order to improving poor wettability, mechanical property and rejection rate to water soluble dyes, the electrospun PSF fibrous membrane was padding with 2%-0.4% and 2%-0.48% chitosan solution cross-linked by glutaraldehyde. The wettability, mechanical property, and filtration property to disperse blue 2BLN and weak acid blue N-RL with dead-end filtration method under constant pressure 0.1MPa of electrospun PSF fibrous membrane before and after treatment were studied . The result showed that the wettability and mechanical property of electrospun PSF fibrous membrane have significantly improved after treatment. It also showed that the untreated and 2%-0.4% fibrous membranes had high rejection rate to disperse blue 2BLN which were all above 94%, and low rejection rate to weak acid blue N-RL which were all under 35%, but both of them had high filtration flux. However, the 2%-0.48% fibrous membrane had much higher rejection rate to disperse blue 2BLN and weak acid blue N-RL, was 99.5% and 92.4%, respectively, but the filtration flux was decreased greatly.

Key words: electrospun polysulfone fiberus membrane, cross-linked chitosan, wettability, mechanical property, filtration property