Structure, Filtration and Service Life of Hydrophilic Membrane
2023-07-18
Structure, Filtration and Service Life of Hydrophilic Membrane
The structure of Hydrophilic Membrane can be divided into symmetrical and asymmetrical. The former is isotropic, there is no cortex, and the pores in all directions are the same, which belongs to deep filtration; the latter has a denser surface layer and a bottom layer dominated by finger-like structures, and the thickness of the surface layer is 0.01 microns or less. And it has micropores arranged in an orderly manner, and the thickness of the bottom layer is 200-250 microns, which belongs to the surface filter. Hydrophilic membranes used in industry are generally asymmetric membranes. The membrane materials of hydrophilic membrane mainly include cellulose and its derivatives, polycarbonate, polyvinyl chloride, polyvinylidene fluoride, polysulfone, polyacrylonitrile, polyamide, polysulfone amide, sulfonated polysulfone, cross-linked Polyvinyl alcohol, modified acrylic polymers, etc.
Hydrophilic membrane filtration
The membrane filtration method that adopts Hydrophilic Membrane and uses pressure difference as driving force is hydrophilic membrane filtration. Hydrophilic membranes are mostly made of acetate fibers or polymer materials with similar properties. It is most suitable for the separation and concentration of solutes in solutions, and is also commonly used for the separation of colloidal suspensions that are difficult to complete with other separation techniques, and its application fields are constantly expanding.
The service life of the hydrophilic membrane
The chemical cleaning cycle of the hydrophilic Hydrophilic Membrane is relatively long, and the chemical cleaning recovery is better. In each chemical cleaning cycle, the flux recovery after backwashing is close to 100%; the chemical cleaning cycle of the non-hydrophilic hydrophilic membrane is short, The flux recovery after backwashing in each chemical cleaning cycle is only 80--90%. Therefore, in water treatment engineering, hydrophilic membranes have obvious advantages over non-hydrophilic hydrophilic membranes, and can be used within the service life. Well maintained at a stable flow --- design flow
The structure of Hydrophilic Membrane can be divided into symmetrical and asymmetrical. The former is isotropic, there is no cortex, and the pores in all directions are the same, which belongs to deep filtration; the latter has a denser surface layer and a bottom layer dominated by finger-like structures, and the thickness of the surface layer is 0.01 microns or less. And it has micropores arranged in an orderly manner, and the thickness of the bottom layer is 200-250 microns, which belongs to the surface filter. Hydrophilic membranes used in industry are generally asymmetric membranes. The membrane materials of hydrophilic membrane mainly include cellulose and its derivatives, polycarbonate, polyvinyl chloride, polyvinylidene fluoride, polysulfone, polyacrylonitrile, polyamide, polysulfone amide, sulfonated polysulfone, cross-linked Polyvinyl alcohol, modified acrylic polymers, etc.
Hydrophilic membrane filtration
The membrane filtration method that adopts Hydrophilic Membrane and uses pressure difference as driving force is hydrophilic membrane filtration. Hydrophilic membranes are mostly made of acetate fibers or polymer materials with similar properties. It is most suitable for the separation and concentration of solutes in solutions, and is also commonly used for the separation of colloidal suspensions that are difficult to complete with other separation techniques, and its application fields are constantly expanding.
The service life of the hydrophilic membrane
The chemical cleaning cycle of the hydrophilic Hydrophilic Membrane is relatively long, and the chemical cleaning recovery is better. In each chemical cleaning cycle, the flux recovery after backwashing is close to 100%; the chemical cleaning cycle of the non-hydrophilic hydrophilic membrane is short, The flux recovery after backwashing in each chemical cleaning cycle is only 80--90%. Therefore, in water treatment engineering, hydrophilic membranes have obvious advantages over non-hydrophilic hydrophilic membranes, and can be used within the service life. Well maintained at a stable flow --- design flow
