Description
PVDF for Water Treatment Membrane is a high-performance fluoropolymer specifically engineered for membrane fabrication. It delivers excellent chemical resistance, hydrophilic modification compatibility, and long-term mechanical stability, making it an ideal material for producing reliable membranes used in advanced water and wastewater treatment systems.
PVDF membranes play a critical role in modern water treatment technologies, including microfiltration (MF), ultrafiltration (UF), and membrane bioreactor (MBR) systems. The performance of these membranes depends heavily on the quality and consistency of the PVDF resin used in their fabrication.
From a materials engineering perspective, this PVDF grade is optimized for membrane casting and spinning processes. It demonstrates excellent solubility and solution stability in typical membrane solvents such as NMP, DMAc, and DMF. During phase inversion, the resin allows precise control over pore size distribution and membrane morphology, resulting in membranes with high permeability and reliable retention performance.
Chemically, PVDF offers outstanding resistance to chlorine, oxidizing agents, acids, and alkalis commonly encountered in water and wastewater treatment. This resistance enables membranes to withstand frequent chemical cleaning cycles, including exposure to sodium hypochlorite and other disinfectants, without significant degradation or loss of mechanical strength.
In terms of mechanical performance, PVDF membranes exhibit high tensile strength and fatigue resistance, which are essential for maintaining membrane integrity under continuous pressure and backwashing conditions. The material's thermal stability also supports hot water cleaning and elevated operating temperatures, expanding the membrane's operational flexibility.
Another key advantage is PVDF's compatibility with hydrophilic modification. Through blending or surface treatment, membrane wettability can be significantly improved, reducing fouling and enhancing water flux. This directly contributes to lower operating pressure, reduced energy consumption, and longer membrane service life.
Specification
|
Properties |
Test Method |
Unit |
HD9104 |
|
Average Particle Size |
Laser |
μm |
15-30 |
|
Density |
ASTM D792 |
g/cm3 |
1.77 |
|
Melting Point |
ASTM D3418 |
°C |
164 |
|
Water Absorption |
ASTM D570 |
WT% |
0.03 |
|
Intrinsic Viscosity |
Ubbelohde |
102 ml/g |
1.55-1.90 |
|
Rotational Viscosity |
0.1g/ml DMAC |
mPa.s |
550-900 |
|
LOI |
ASTM D2683 |
% |
43 |
Typical Applications
● Ultrafiltration (UF) membranes
● Microfiltration (MF) membranes
● Membrane bioreactor (MBR) systems
● Industrial wastewater treatment
● Municipal water purification
Advantages
● Features: High-purity PVDF resin, controlled molecular weight, excellent solvent compatibility.
● Advantages: Stable membrane formation, strong chemical resistance, and robust mechanical properties.
● Benefits: Longer membrane lifespan, reduced cleaning frequency, stable filtration performance, and lower operating costs.
● Evidence: PVDF membranes are widely used in municipal water treatment, industrial wastewater recycling, and MBR systems, with performance validated through long-term pilot and commercial operations.
This PVDF grade is suitable for both flat-sheet and hollow-fiber membrane production and can be customized to meet specific flux, strength, and chemical resistance requirements.
Characteristics Platform
Quality Control
Packagings
25kg/woven bag, 800kg/pallet
Workshop Gallery
Customer Cases
FAQ
Q1: Why is PVDF widely used for water treatment membranes?
A: PVDF offers excellent chemical resistance, mechanical strength, and compatibility with membrane fabrication processes, making it ideal for long-term water treatment applications.
Q2: Is this PVDF suitable for chlorine-resistant membranes?
A: Yes. PVDF shows strong resistance to chlorine and oxidizing agents commonly used in membrane cleaning.
Q3: Can PVDF membranes be used in MBR systems?
A: Yes. PVDF is one of the most commonly used materials for MBR membranes due to its durability and cleaning resistance.
Q4: How does PVDF affect membrane fouling performance?
A: PVDF supports hydrophilic modification, which improves wettability and reduces fouling tendencies.
Q5: Can the PVDF grade be customized for different membrane structures?
A: Yes. Molecular weight and formulation can be adjusted to control pore size, permeability, and mechanical strength.
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