Abstract
The charged poly(vinylidene fluoride) (PVDF) membranes were prepared by composite thermally induced phase separation (C-TIPS) method with perfluorosulfonic acid (PFSA) as additive. The results verify that the porosity, surface hydrophilicity and pure water permeation flux (JW) increase with the addition of PFSA for the membranes. The highest JW of 507.2±1.2L/(M2Hbar) is obtained for the membrane cast at 90°C. Much higher casting temperature isn’t advantageous to improve JW value for the PVDF membranes. All membranes exhibit negative apparent zeta potential (ζapp). The crystallinity in β phase increases as casting temperature increases for all PVDF membranes.
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