PVDF Membrane Material for Water Treatment

Choosing a Membrane Material

Membranes in municipal and industrial plants face fouling, frequent chemical cleaning with sodium hypochlorite, acids and alkalis, and constant mechanical stress. Materials such as PES, PS and PAN can be cheaper, but they lose strength and flux under repeated oxidant cleaning, so modules must be replaced sooner.

Membrane replacement is one of the largest operating costs of a plant, so the material choice has a direct effect on lifetime cost.

Why PVDF

PVDF (polyvinylidene fluoride) combines excellent resistance to oxidants, acids and most solvents with high mechanical strength and good thermal stability. Hollow fibers made from PVDF stay strong and keep high, stable flux through years of cleaning cycles.

PVDF also forms membranes easily by phase inversion, giving a uniform pore structure and good permeability. That is why it has become the leading material for UF and MBR membranes worldwide.

Recommended Products

Our membrane-grade PVDF resin is designed for hollow-fiber and flat-sheet membrane production, with stable molecular weight and good solubility in DMAc and NMP.

PVDF Resin (Water Treatment Membrane Grade)View product →

Technical Points and Market Trends

For membranes, a high-molecular-weight homopolymer grade is normally used, dissolved at 15–20 % in DMAc or NMP with pore-forming additives such as PVP or PEG, then spun or cast and coagulated in water (NIPS) or processed by TIPS. Consistent batch quality is critical for stable fiber properties.

Global demand for water treatment membranes keeps growing, driven by water scarcity, wastewater reuse, stricter discharge standards and expanding municipal and industrial MBR projects, especially in Asia, the Middle East and Latin America.

Frequently Asked Questions