Spinning an optimized hollow fiber membrane for desalination by membrane distillation using experimental statistical designs

摘要

Various hollow fiber membranes were prepared using different polymers such as polyvinylidene fluoride (PVDF), solvents and additives [1,2]. These hollow fiber membranes were tested in membrane distillation (MD) and some of them exhibited high MD performance (i.e. high permeate flux and high salt rejection factor). Dry/wet or wet spinning and melt-extruded/cold-stretching are the most applied techniques. It should be pointed out that PVDF has been frequently used as the base material for preparation of hydrophobic hollow fiber membranes [1]. This can be explained by its high chemical resistance to most of corrosive chemicals and organic compounds, thermal stability and hydrophobicity.