Fabrication And Applied Research Of Superhydrophobic And Superoleophylic Strainer Mesh

The quality of oil and water affects every aspect of human production and life. Dirty oil in water can reduce water quality, or even cause serious water pollution. The waste water in oil will seriously affect quality and service efficiency of the oil. Research on oil-water separation technology have great significance for improving the quality of oil and water. According to the different wettability of oil and water on the surface, superhydrophobic and superoleophylic strainer mesh can separate oil from water. It is a new tool with the highly effective oil water separation. This paper proposed two kinds of method based on the chemical etching and chemical plating respectively used pure copper wire mesh and stainless steel wire mesh to prepare superhydrophobic and superoleophylic strainer mesh, and did a series of research on them.Chemical etching was used to fabricate superhydrophobic and superoleophylic surface on pure copper. The etching mechanism FeCl3etching pure copper was that crystal defects exposed on the surface such as grain boundary and dislocation were preferentially dissolved by FeC13etching fluid, which irregular micro/nano structures occurs on the surface of materials. Through experiments, stearic acid was found to be the low surface energy material applied to fabricate superhydrophobic and superoleophylic surface on pure copper, and appropriate modification time was1h.A method of fabricating superhydrophobic and superoleophylic strainer based on chemical etching was studied in this paper, which pure copper wire mesh was substrate, FeCl3/HCl solution was etching fluid,and stearic acid etching was surface modification material. Designing the oil-water separation test, this paper analyzed efficiency of oil-water separation by the strainer. The result showed:serried mesh structure ptomotcd the wettability of surface of pure copper wire mesh to some extent. On the superhydrophobic and superoleophylic strainer with200mesh fabricated via this method, water contact angle was159.6°,water sliding angle was18°,and the kerosene droplet could spread on the wire film and permeate through it rapidly. The rough structures etched out on surface of copper wire were finer and uniformer than those etched out on copper plate. When basal diameter was less than170μm, the efficiency of this strainter for separating a variety of oil-water mixture was above99%. Stainless steel wire mesh was immersed into CuSO4/HCl solution to coppering, then was modified by stearic acid to fabricate superhydrophobic and superoleophylic strainer with superior performance. We researched microstructure and chemical composition on the surface of this strainer via SEM and EDS, analyzed the influence of aperture for mesh hydrophobie. Designing the oil-water separation test, this paper analyzed efficiency of oil-water separation by the strainer. The results show that:On the strainer fabricated by means of this method, watet contact angle could reach163.9°, water sliding angle was less than6°, and Oil droplets could be infiltrated and quickly spread in strainter surface in a very short time. When basal diameter lessed than150μm, the superhydrophobic and superoleophylic strainer prepared by this method had good super hydrophobie. When basal diameter lessed than230μm, the efficiency of this strainter for separating a variety of oil-water mixture was above99%.