Membrane Separation Technology
Membrane separation technology is considered to be “one of the most promising and promising major high-tech developments in the 21st century, and it plays a strategic role in industrial technological transformation.” Membrane separation technology refers to the separation, classification, purification or concentration of liquid or gas mixed with two components or even multiple components by the osmosis of a specific membrane driven by external energy or chemical level difference.
Polyvinylidene fluoride (PVDF) is a common membrane material. It has excellent anti-oxidation activity, strong thermal stability, high mechanical strength and good film-forming properties. It is widely used in people’s production and life. However, the strong hydrophobicity of PVDF itself makes it easy to block membrane pores in the membrane and other retentate in the water treatment system, which results in a decrease in water flux and anti-pollution performance during membrane filtration. Multiple cleanings reduce the service life of the membrane. These shortcomings of the membrane constrain the development and application of membrane separation technology. Therefore, in order to improve the separation performance of the membrane, increase the service life of the membrane, and to improve the operational stability, enhance the anti-pollution ability, and improve the hydrophilic properties of the membrane is particularly important. To this end, researchers often improve the membrane surface and the properties inside the membrane by hydrophilic modification to improve the filtration capacity and anti-pollution performance of the PVDF membrane.