Study On Hydrophilic Modificationof Thermostable Poly (Aryl Ether Sulfone Ketone) Ultrafiltration Membrane

Membrane separation technology as a new type of efficient separation technology has broad application prospects, ultrafiltration membrane has been widely used in water treatment, but ultrafiltration membrane hydrophilic polymer is generally poor, weak ability to resist pollution which hindered the promotion of ultrafiltration membrane. The properties of membrane materials are the main restricting factors, develop a new type of hydrophilic material and hydrophilic modification of existing materials become an effective way to improve the ultrafiltration membrane pollution resistance. In this paper in order to improve the hydrophilicity of the ultrafiltration membrane as the research objective, hydrophilic modification of ultrafiltration membrane and do the research of the system.By bisphenol A(BPA), bisphenol fluorene(BHPF), 4, 4 ’- two fluorine diphenyl ketone(DFK) and 4, 4’- dichloro diphenyl sulfone(DCS) as raw material, the change of bisphenol A and bisphenol fluorene mole ratio of anhydrous potassium carbonate as bound water, through nucleophilic replace polycondensation synthetic bisphenol A/bisphenol fluorene type polymer, poly(aryl ether sulfone ketone)(PAESK) through thermal weight loss characterization methods, such as A test to polymer characterization of its structure prop erties; By immersion precipitation phase catalysis preparation of PAESK ultrafiltration membrane, by testing the thermogravimetric, water contact Angle, porosity, water flux and bovine serum albumin filtrate rate, mechanical strength, such as performance, the results show that the ratio of A/fluorene 7:1 ultrafiltration membrane has good comprehensive performance.Nanometer titanium dioxide(Ti O2) by particle blending modification of ultrafiltration membrane, the Ti O2 using ultrasonic cavitation is uniforml y distributed in the casting solution, made into film. And through the test of X-ray diffraction, water contact Angle, scanning electron microscope, porosity, water flux and bovine serum albumin filtrate rate, mechanical strength, such as performance, the results show that the introduction of Ti O2 enhanced membrane hydrophilic and mechanical strength, water flux decreased, however, when Ti O2 nanoparticle content is 1.0 wt % for the comprehensive performance of modified membrane is best, dramatically improve ability to resist pollution.By blending modification, the method of using Pluronic F127 to hydrophilic modification of ultrafiltration membrane, the Pluronic F127 directly join mixing scraping membrane casting solution, and the modified membranes charact erized and evaluated. And through the test of water contact Angle, porosity, water flux, bovine serum albumin filtrate rate, mechanical strength, such as performance, the results show that the introduction of improved the hydrophilicity of the modified lay er with Pluronic F127, total modified membrane pollution and irreversible pollution were significantly lower, water flux has been increased greatly, the comprehensive performance of the modified layer with analysis think Pluronic F127 optimal adding quantity is 4 wt %.