Preparation and Properties of Phenolphthalein Based Polyetheretherketone/Polyethylenimine Composite Ultrafiltration Membrane
The composite ultrafiltration membrane with high pure water flux was prepared to realize efficient and rapid separation of dye wastewater.Using phase separation and conversion method,acetone as non-solvent,phenolphthalein polyetheretherketone and polyethylenimide were used as research objects.A kind of phenolphthalein polyetheretherketone/polyethylenimide composite ultrafiltration membrane with good properties was developed at room temperature.The effects of the mass fraction of phenolphthalein polyetheretherketone(PEEK-WC),the amount of polyethylenimine(PEI)and the modification reaction time on the properties of the composite ultrafiltration membrane were analyzed.With the increase of reaction time,the water flux of the composite ultrafiltration membrane increased.With the increase of polyvinylimide mass fraction,the water flux of composite ultrafiltration membrane increased.The optimum preparation conditions of the composite ultrafiltration membrane are as follows:the mass ratio of PEI to PEEK-WC is 20%,the mass ratio of PEEK-WC to NMP is 15%,and the reaction time is 12 h.Phenolphthalein polyetheretherketone/polyethylenimide composite ultrafiltration membrane has good retention effect and resistance to bacterial contamination.
ultrafiltration membranehigh pure water fluxdye interceptionsalt dyeing system
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