Last Updated on June 20, 2022 by Kevin Chen
PVDF, also known as polyvinylidene fluoride, is a polymer organic synthetic material. PVDF has good chemical and high-temperature resistance. It is a good material for producing nanofiltration membranes and reverses osmosis membranes. The following article will discuss PVDF and why MBR membrane elements also use PVDF material.
What is PVDF?
Polyvinylidene fluoride mainly refers to the homopolymer or copolymer of vinylidene fluoride and other small amounts of fluorine-containing vinyl monomers. It has chemical resistance, high-temperature resistance, oxidation resistance, radiation resistance, and other characteristics. PVDF is the second-largest product of plastic products, with a global annual production capacity of more than 53,000 tons.
Why are membrane elements made of PVDF?
Why are membrane elements made of PVDF? In addition to the good chemical resistance of PVDF material, its dielectric properties are also the main reason for using PVDF material in MBR membrane elements. We all know that MBR is a high-precision filtration membrane product that filters and purify small molecules that are not visible to the naked eye. The retention mechanism of these small molecules is more by using the molecular force between substances, that is, the electronic force. In particular, membrane elements such as nanofiltration and reverse osmosis membranes, which are used for salt removal, need such dielectric substances to retain charged ions in the water when they enter the filter membrane.
What are the Advantages of PVDF MBR Membrane?
PVDF has a series of advantages, so we can use it to produce membrane elements. The main advantages are as follows:
- Acid and alkali resistance: Thanks to the chemical stability of PVDF, the membrane element can work in a strong acid and alkali environment.
- Easy to clean: PVDF material has strong flexibility, can be repeatedly cleaned and is not easily deformed.
- Anti-pollution: PVDF has strong oxidation resistance, so the membrane element is not easily polluted by microorganisms, organic substances, and other substances.
- High-pressure resistance: PVDF membrane elements have strong pressure resistance, so the flux of the MBR membrane elements is also big.
The above is the relationship between the membrane element and the PVDF material. Except for PVDF, there are other materials available for membrane elements. Different materials have different costs and different application fields. If you are interested in related content, please subscribe to SPERTA.
Shanghai SPERTA Environmental Technology Co., Ltd. has specialized in producing water treatment products for many years. The company has its own MBR membrane technology, a complete technical team, and pre-sales and after-sales service. If you have any needs or any other related questions, don’t hesitate to contact SPERTA.