Rule Of Pore Size Change Of Composite Ultrafiltration Membrane In Magnetic Fields

That one membrane separates kinds of efficacious composition realized by the invented separate method of magnetic composite ultrafiltration membrane. Ultrafiltration membrane separation is mainly based on the screening mechanism. Ultrafiltration membrane pore size is due to a statistical average, usually referred to as "the equivalent aperture." Thus the measurement, equivalent diameter and equivalent pore size distribution (EPSD) of magnetic ultrafiltration membrane, is particularly important. A rapid and reliable method suitable for determination of pore size change of composite ultrafiltration membrane in magnetic fields has been developed. The rule and elements of EPSD change of composite ultrafiltration membrane in magnetic fields has been analyzed and examined methodically. The conclusions as follows:1. a stable, accurate, and easy detection method of magnetic membrane EPSD in magnetic fields has been set up.2. in magnetic fields, the EPSD change of un-composite ultrafiltration membrane is inapparent. The EPSD change of composite ultrafiltration membrane changed by the mix method and the surface sediment method is distinct.3. With the rise of magnetic intensity, the former equivalent pore size increases in 0T～0.4T, reduces in 0.4T～1.2T; the latter pore size reduces in 0T～1.2T.4. The SEM express, Two styles , sediment and pack particle exist in the composite ultrafiltration membrane. For torsion and magnetostrictive of magnetic exist. The EPSD change of composite ultrafiltration membrane caused by the Synergy both of them with the mix method, and by the sediment alone with the surface sediment method.