Alcohol soluble protein gas-liquid interface self-assembled porous membrane and preparation method thereof

A method for preparing an alcohol soluble protein gas-liquid interface self-assembled porous membrane, comprising the following steps:

• S1, adding an alcohol soluble protein into a good solvent to be dissolved to obtain a membrane storage solution with an alcohol soluble protein concentration of 10 to 30 wt %;
• S2, regulating and controlling a temperature of an anti-solvent to be 25° C. to 40° C.;
• and
• S3, dropping the membrane storage solution in the S1 into the anti-solvent in the S2 to form a self-assembled porous membrane;
• wherein pH of the anti-solvent is 3.0 to 10.0, and an ionic strength thereof is 0 to 700 mM;
• wherein the good solvent comprises any one of 50% to 90% (v/v) of an aqueous ethanol solution, 60% to 90% (v/v) of an aqueous methanol solution, 60% to 100% (v/v) of an aqueous acetic acid solution and 70% to 90% (v/v) of an aqueous acetone solution;
• wherein 100% (v/v) of the aqueous acetic acid solution means a pure acetic acid;
• wherein the anti-solvent comprises any one of water, 0.1% to 50% (v/v) of an aqueous ethanol solution, 0.1% to 60% (v/v) of an aqueous methanol solution, 0.1% to 60% (v/v) of an aqueous acetic acid solution and 0.1% to 70% (v/v) of an aqueous acetone solution;
• titration of the anti-solvent in the S3 is single titration, and a volume ratio of the membrane storage solution to the anti-solvent during titration is 1:(500 to 10,000).