PROGRESS IN RESEARCHES ON HYDROPHILIZATION OF MICROFILTRATION MEMBRANE

The hydrophilization of hydrophobic polymeric microfiltration membrane can be divided into physical and chemical approaches.The chemical methods include the process of the membrane surface and the modification of material.The membrane can be hydrophilized by low temperatues plasma,ultraviolet radiation,γ-ray and ozone,but its stability needs to be improved.Grafting of hydrophilic polymer to the back-bone of the molecules can not only hydrophilize the surface and pore-wall successfully but also can functionalize the membrane.The physical method,include blending,addition of amphilic comb and inorganic filling.Blending is commonly used in the modification of membrane,but the performance of the membrane will be often changed.The addition of the amphilic comb polymer can endow stable membrane hydrophilization.+At present,the hydrophilization of the membrane prepared via non-solvent induced phase separation has been fully developed,while the hydrophilization of the membrane prepared via thermally induced phase separation is mainly focused on the surface modification and preparation with co-polymers.The paper aims to review the recent progress in these researches at the home and abroad.