Recent progress on structure and performance control of hydrophobic PVDF membranes prepared by non-solvent induced phase separation
Non-solvent induced phase separation(NIPS)is an efficient method to prepare porous hydrophobic membranes.It involves thermodynamic and kinetic factors which have deterministic effects on the structure and performance of hydrophobic porous membranes.Hence,a commonly used material for hydrophobic membrane preparation,PVDF,is taken as the research object in this paper.This paper systematically summarizes the influencing factors and membrane formation mechanisms of traditional immersion precipitation method and emerging spray-assisted non-solvent induced phase separation method in the membrane preparation process,focusing on the effects of different fabrication conditions on the membrane structure and performance(hydrophobicity,pore size and porosity,etc.),which could lay a foundation for the controllable preparation of hydrophobic membranes.
NETL
NSTL
万方数据
维普
