Preparation method of oil-water separation membrane

Abstract

The invention discloses a preparation method of an oil-water separation membrane, and belongs to the technical field of chemical engineering and macromolecule functional materials. The preparation method includes the steps that an aluminum net is subjected to ultrasonic cleaning in an ultrasonic cleaner for 15-25 minutes through acetone and absolute ethyl alcohol, washed through deionized water to remove oil stains on the surface and dried through nitrogen; the aluminum net is soaked into an HCL water solution for 5-15 minutes, washed through deionized water and dried through nitrogen; PVC is dissolved into deionized water of 90 DEG C to be prepared into a solution, the mass concentration of the solution is 14%, nanometer SiO2 particles are ultrasonically dispersed into a PVA solution according to the proportion of 3-4 mg / ml, and a PVA / SiO2 compound is obtained after generated suspension is dried in a drying box of 60-80 DEG C; the compound is ground into powder and ultrasonically dispersed into absolute ethyl alcohol according to the proportion of 10-15 mg / ml; the aluminum net obtained in the step 2 is soaked into a PVA / SiO2 ethanol solution for about 30 minutes and dried for 1-2 hours at room temperature, and after ethyl alcohol volatilizes completely, the operation of soaking-drying is repeated 4-5 times to obtain the super-hydrophilic super-oleophobic net membrane.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and polymer functional materials, in particular to a preparation method of a superhydrophilic and superoleophobic oil-water separation membrane. Background technique [0002] Fuels such as gasoline, diesel and aviation fuel, which are the blood of industry, have brought great hidden dangers to the operation safety of automobiles, ships, large machinery and aircraft due to their substandard water content. Therefore, the oil-water separation in gasoline and diesel has attracted more and more attention. Patent Publication No. CN103521095A discloses a method for preparing a tubular ceramic membrane used for oil-water separation, including a step of selecting an aluminum oxide ceramic membrane tube, and a step of coating the membrane-making liquid on the ceramic membrane tube. Step and a step of drying the ceramic membrane, in the step of selecting the aluminum oxide ceramic membrane tube...

AI Technical Summary

Problems solved by technology

[0002] Fuels such as gasoline, diesel and aviation fuel, which are the blood of industry, have brought great hidden dangers to the operation safety of automobiles, ships, large machinery and aircraft due to their substandard water content.