Preparation of reinforced PVDF/GO hollow fiber membranes with TIPS-reinforced method and performance analysis
Nowadays,membrane bioreactors(MBR)are the common method used to treat wastewater.In this study,a high-flux,high-strength graphene oxide(GO)-doped braided tube reinforced polyvinylidene fluoride(PVDF)hollow fiber membrane was prepared by green diluent thermal induced phase separation(TIPS)method and fiber reinforcement technology.The surface of GO had the function of abundant oxygen,which can significantly improve the permeability flux and hydrophilicity(anti-fouling)of PVDF hollow fiber membranes.The results showed that the tensile strength of the hollow fiber membrane can reach 223.75MPa,and the water contact angle of the reinforced PVDF hollow fiber membrane decreased from 102.04° to 89.71°,and the pure water flux increased from 920.74L/(m2·h)to 1417.45L/(m2·h)with the increase content of GO.Finally,the experimental test of membrane activated sludge filtration with MBR test equipment indicated that the rejection was greater than 99.50％and the stable rejection was greater than 98％.Consequently,the prepared PVDF hollow fiber membrane by the whole process of green preparation exhibited a good guiding role in replacing the secondary polluted hollow fiber membrane in the current market.
万方数据
维普
