Preparation And Application Of Fluorinated Acrylate Resin And Its Composited Materials Used For Oil-water Separation

The existence of water in oil can seriously reduce the quality of oil, so the efficiency andthe service life of the engine were reduced, which causes enormous damage and loss toindustrial production and modern living. Therefore, it is particularly necessaryal to reduce thecontent of water in oil. Generally, the hydrophobic-oleophilic properties of oil-waterseparation filter is endowed by spraying PTFE powder on the filter media. However, there arestill some defects such as high film-forming temperature and poor oleophilicity. Therefore,developing a facile and inexpensive approach to obtain an oil-water separation media iscrucial.Firstly, with methyl octadecyl acrylate and styrene as oleophilic monomer, fluorinatedmonomer as hydrophobic monomer, 2-hydroxyethyl methacrylate as hydroxy monomers, athermosetting fluorine-containing acrylic resin was prepared by free radical solutionpolymerization. Effect of the types, content and the way of addition of the fluorinatedmonomer on the properties of resin was studied. Besides, the ratio of the St/SMA/DFMA andthe amount of hydroxyl monomers were optimized for the performance of the resin. Stainlesssteel mesh was impregnated into the preparaed resin with the appropriate concentration. Aftercuring at 120℃, the oleophilic and hydrophobic filter was obtained. The contact angle ofwater and contact angle of kerosene were 132.4°and 0°, respectively.Secondly, to enhance the hydrophobic and oleophilic properties of the resin coated mesh,a micro-structure on the surface of the mesh was fabricated by blending nano-SiO2 particleinto the prepared fluorinated acrylate resin. Effects of nano-SiO2 content and concentration ofcomposite resin on the hydrophobic and oleophilic properties of stainless mesh wereinvestigated. The results show that a superhydrophobic and superoleophilic filter can beobtained when the nano-SiO2 particle content was 20wt% and the concentration of thesolution was 10wt%.Finally, base on oil-water separation mechanism, a simple oil-water separation devicewas designed. Application of the prepared composite resin on stainless mesh as oil-waterseparation filter was studied. The results show that improving the hydrophobicity of filter ismore important for high water separation efficiency in the process of oil-water separation.The prepared hydrophobic and oleophilic resin can be applied to stainless steel mesh with theaperture in the range of 50 to 1800 mesh. The resin coated stainless steel mesh can also beused for water separation in a varietyof oil-water mixture.