US 11,939,440 B2
Alcohol soluble protein gas-liquid interface self-assembled porous membrane and preparation method thereof
Jie Xiao, Guangdong (CN); Wuhui Lu, Guangdong (CN); and Jiyang Cai, Guangdong (CN)
Assigned to SOUTH CHINA AGRICULTURAL UNIVERSITY, Guangdong (CN)
Appl. No. 18/029,103
Filed by SOUTH CHINA AGRICULTURAL UNIVERSITY, Guangdong (CN)
PCT Filed Aug. 31, 2022, PCT No. PCT/CN2022/116283
§ 371(c)(1), (2) Date Mar. 29, 2023,
PCT Pub. No. WO2023/077935, PCT Pub. Date May 11, 2023.
Claims priority of application No. 202111315081.0 (CN), filed on Nov. 8, 2021.
Prior Publication US 2023/0295386 A1, Sep. 21, 2023
Int. Cl. C08J 5/22 (2006.01); B01D 67/00 (2006.01); C08J 5/18 (2006.01); C08J 9/28 (2006.01); A61M 31/00 (2006.01); B01D 69/00 (2006.01)
CPC C08J 5/18 (2013.01) [C08J 9/28 (2013.01); A61M 31/002 (2013.01); B01D 67/0002 (2013.01); B01D 69/00 (2013.01); C08J 5/2212 (2013.01); C08J 2389/00 (2013.01)] 4 Claims
OG exemplary drawing
 
1. 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).