Preparation and performance of PES-COOH/3D-TFC nanofiltration membrane
The molecular design method was used to introduce different content of carboxyl groups into the PES-COOH active separation layer to improve its hydrophilicity,combined with the support layer with low tortuosity,micropore structure and adjustable porosity prepared by 3D printing technology,a PES-COOH/3D-TFC nanofiltration membrane with improved permeability,rejection and anti-pollution performance was improved.The physical and chemical properties of the composite membrane were tested by infrared spectroscopy,scanning electron microscopy,biological microscopy,water contact angle test and Zeta potential test,and the effects of the carboxyl group content of the separation layer and the microstructure of the support layer on the properties of the composite membrane were investigated.The results showed that when the carboxyl content of the separation layer was 60％and the porosity of the support layer was 70％,the water flux of the composite nanofiltration membrane was 4.4 L/(m2·h),the rejection rate of sodium sulfate was 78.1％,and the flux attenuation rate and flux recovery rate in the anti-pollution test were 23.8％and 96.2％.
万方数据
维普
