Preparation of Hollow Fiber Membrane Precursor from Glass and PVDF by Non-Solvent Induced Phase Separation

摘要

Glass hollow fiber membrane precursor was well prepared using glass and polyvinylidene fluoride (PVDF) as starting materials by non-solvent induced phase separation. The spinning dope including glass powders and PVDF was obtained firstly. Then the hollow fiber membrane precursors were spinning via dry-wet spinning method. The parameters about preparation process were listed. The viscosity of spinning dope was also measured. The results showed that the viscosity increased with a function of the content of PVDF. The suitable viscosity for spinning technology was selected. The scanning electron microscopy showed that the glass powders with the diameter of several micrometers were connected by PVDF binder. The water flux was also tested, and it decreased with the time. The preparation technology of glass hollow fiber membrane precursor could provide support for the glass hollow fiber membrane via sintering process.