Preparation process of amphiphobic membrane

Abstract

The invention relates to a preparation technology of a hydrophobic and oleophobic film. The technology specifically comprises the following steps that a hydrophobic monomer and an oleophobic monomer are selected to be prepared into a solution, a droplet spraying method is adopted to enable the solution to permeate into an organic microporous film of a base material, glow discharge plasmas under barometric pressure are used for treating the monomers, free radicals are produced and rapidly polymerized to form a polymer with the hydrophobic and oleophobic property, meanwhile, the microporous structure of the organic film of the base material is not damaged, finally, heating is carried out to remove residual matter, and the hydrophobic and oleophobic film is formed. According to the film material, the preparation technology is simple, industrial production is convenient, the problem that fiber monomers bonded into beams, and therefore the film hole diameter is enlarged is prevented by controlling spraying pressure and the spraying speed, the microporous structure is obvious, the stability is quite good, the breathability effect is good, the hydrophobic and oleophobic property is good, and the hydrophobic and oleophobic film is applicable to gas-solid separation of gas containing oil.

Description

technical field [0001] The invention belongs to the fields of materials and chemicals, and in particular relates to a preparation process of a hydrophobic and oleophobic film. Background technique [0002] At present, the traditional treatment methods of oily fume mainly include inertial separation method, electrostatic deposition method, liquid absorption method, filter adsorption method and so on. The inertial separation method has simple equipment, and the purification efficiency is less than 20%. When the electrostatic deposition method is used to treat the oily system, its ignitability is questioned, and the energy consumption is high. The liquid absorption method is easy to corrode the equipment and has the problem of secondary pollution. The filter adsorption method has high purification efficiency, but its resistance is large, and the high-viscosity oil component is very easy to contaminate the filter medium, and the cleaning is difficult, resulting in a shortened se...

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Problems solved by technology

The inertial separation method has simple equipment, and the purification efficiency is less than 20%. When the electrostatic deposition method is used to treat the oily system, its ignitability is questioned, and the energy consumption is high. The liquid absorption method is easy to corrode the equipment and has the problem of secondary pollution. The filter adsorption method has high purification efficiency, but its resistance is large, and the high-viscosity oil component is easy to contaminate the filter medium, and the cleaning is difficult, which leads to the reduction of the service life of the filter material

Chinese patent CN201410757998.X uses atomic layer deposition (ALD) to coat polytetrafluoroethylene mesh fibers with nanoparticles; then treat the surface of polytetrafluoroethylene film with plasma, and place it in perfluoromonomer, After plasma grafting treatment to obtain the modified PTFE membrane material, the process is complicated and cannot be industrialized.

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