CAJ | 학술논문

通过喷涂-高温塑化的方法，在400目不锈钢网上复合PPS(聚苯硫醚)-PTFE(聚四氟乙烯)涂层，构造微米级细长纤维结构，制成一种新型聚四氟乙烯微孔油水分离膜。该油水分离膜具有良好的疏水性和亲油性，并且能够承受较高的压力而不发生透水。经接触角测量仪测定，水滴在网膜上的接触角可达131.6°，柴油滴一接触网膜就铺展开来，接触角接近0°，具有良好的疏水亲油性。随着膜的厚度增加，膜与水的接触角略有降低。新型油水分离膜可以应用到浮油及分散油的分离中，正交试验表明水的流量对分离膜的分离效果影响最大，油流量影响次之，分离压力影响最小。在水流量10 L×h-1、油流量1.02 L×h-1、分离器进出口压力差10 kPa条件下，油水混合物经六级分离，含油量可降低到8.75 mg×L-1，达到国家污水综合排放标准中的二级标准(10 mg×L-1)。
통과분도-고온소화적방법，재400목불수강망상복합PPS(취분류미)-PTFE(취사불을희)도층，구조미미급세장섬유결구，제성일충신형취사불을희미공유수분리막。해유수분리막구유량호적소수성화친유성，병차능구승수교고적압력이불발생투수。경접촉각측량의측정，수적재망막상적접촉각가체131.6°，시유적일접촉망막취포전개래，접촉각접근0°，구유량호적소수친유성。수착막적후도증가，막여수적접촉각략유강저。신형유수분리막가이응용도부유급분산유적분리중，정교시험표명수적류량대분리막적분리효과영향최대，유류량영향차지，분리압력영향최소。재수류량10 L×h-1、유류량1.02 L×h-1、분리기진출구압력차10 kPa조건하，유수혼합물경륙급분리，함유량가강저도8.75 mg×L-1，체도국가오수종합배방표준중적이급표준(10 mg×L-1)。
A new type of microporous polytetrafluoroethylene (PTFE) membrane used for oil-water separation was made by spray-plasticizing method. Basis film is firstly manufactured by composite PPS-PTFE coating on the 400 mesh stainless steel net and then a micron thin fiber structure is constructed on the basis film. This oil-water separating membrane shows hydrophobic and oleophilic properties and can withstand high water pressure without the risk of flooding. The water contact angle of this membrane is 131.6°, and the oil droplet spreads on the surface of the membrane once they get contacted. With the increase in the thickness of the membrane, the water contact angle of this membrane slightly decreases. The membrane can be applied to separate the floating oil or dispersed oil. Orthogonal test shows that the water flow rate has the largest influence on the separation result, followed by the oil flow rate, and the pressure has least effect. Under the condition of water flow rate of 10 L×h-1, oil flow rate of 1.02 L×h-1and the pressure difference of 10 kPa, the oil-water mixture is separated by a six-stage separator to the oil concentration of 8.75 mg×L-1 in the raffinate, which matches national wastewater discharge standards in secondary grade (10 mg×L-1).