Preparation And Characterization Of Composite Ultrafiltration Membranes Based On Electrospinning Technology

In recent years,the water pollution problems are becoming more and more serious,due to the industrial wastewater and domestic wastewater.And the industrial wastewater is mainly from food industry,pharmaceutical industry,petrochemical industry,and so on.Just because of this,it is becoming an important task for sewage treatment and various water treatment technologies developed rapidly.Among them,ultrafiltration technology is considered to be the most effectivetreatment technology.And ultrafiltration technology has generated great interest because of lower operation pressure,low energy consumption and convenient operation.However,characteristics of ultrafiltration membranes are the core part of ultrafiltration.Whether the effects of the ultrafiltration are ideal or not depends greatly on characteristics of ultrafiltration membranes.Therefore,the preparation and characterization of ultrafiltration membranes are our research emphasis.Conventional UF fabricated by the phase inversion method and the surface of it provide a lower porosity and the disconnected water channel,therefore,increasing.the resistence of water permeation as well as increasing the fouling of pollutants.On the contrary,the development of electrospinning greatly improves the performance of UF,involving the advantage of high porosity,high specific surface area and opening structure.This new type of UF membrane based on electrospinning show that high flux,high retention rate,contamination resistance,lower cost and low operation pressure.It brings new dawn to high-performance filtration.In this paper,we prepared three different polyvinyl alcohol(PVA)/polyethylene terephthalate(PET)composite ultrafiltration membranes in connection with the combination of electrospinning technology and coating technology,solution treatment,fumigation processes.The principle and processes for preparing the UF membrane were introduced and the composite structure mainly includes a hydrophilic PVA barrier layer and supporting layer.This strategy for fabrication of composite ultrafiltration membrane not only offers a dense layer but also the more water channel.The paper mainly discussed the optimization on preparation conditions of UF membrane based on those methods in detail.In addition,also characterized the surface structure of UF membrane and tested various properties of UF membrane,such as hydrophilicity,filtration performance,etc.