Asymmetric PES porous membrane for virus removal and preparation method thereof
A porous membrane and asymmetric technology, applied in the field of membrane materials, can solve the problems of inability to retain parvovirus, low protein adsorption rate, high risk, etc., and achieve the effect of being suitable for large-scale promotion, high protein yield, and convenient preparation method
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[0113] Example 1 A method of preparing a PES porous membrane having an asymmetric virus, including the following steps:
[0114] S1: Preparation of a cast film solution and casts it onto the carrier to form a liquid film; wherein the cast film fluid comprises the following parts by weight of 15 parts; 60 parts of the organic solvent; The organic solvent is dimethyl sulfoxide; the polar additive is polyvinylpyrrolidone;
[0115] S2: Posted the liquid film in the air of 6 ° C and a relative humidity of 90%;
[0116] S3: The liquid film after the pre-score is immersed in the curable liquid as the carrier for 25 seconds, and the curable liquid invades the inside of the liquid film and gradually diffuses inward, and then solidifys the formation of a porous film; the cured liquid comprises water and penetration additives. The permeation additive is fluoropropyl hydropropathy; the permeation additive in the cured liquid is 55%; the cured liquid temperature is 20 ° C.
Example Embodiment
[0117] Example 2 A method of preparing a non-symmetric PES porous film except for a virus, including the following steps:
[0118] S1: The cast film solution is prepared and the liquid film is formed onto the carrier; wherein the cast film fluid comprises 17 parts of the following weight of the material; 65 parts of the organic solvent; The organic solvent is ethyl acetate; the polar additive is polyethylene glycol;
[0119] S2: Posted the liquid film in the air of 8 ° C and the relative humidity of 86%;
[0120] S3: The liquid film after the pre-division is immersed in the curable liquid as the carrier lasts for 30 seconds, and the curable liquid invades the inside of the liquid film and gradually diffuses inwardly, and then curing forms a porous film; the cured liquid comprises water and permeation additives. The permeation additive is a fluorine-containing hydrophilic substance trifluoroethanol; the content of the permeation additive in the cured liquid is 50%; the cured liquid...
Example Embodiment
[0121] Example 3 A method of preparing a non-symmetric PES porous membrane having an asymmetric virus, including the steps of:
[0122] S1: Preparation of cast film fluid and cast it to the carrier to form a liquid film; wherein the cast film fluid comprises: 19 parts by weight of the following: polyethersulfone; 70 organic solvents; 12 parts of polarity additive;
[0123] The organic solvent is caprolactam; the polar additive is a polyethyleneimine;
[0124] S2: Posted the liquid film in the air having a temperature of 10 ° C and a relative humidity of 82%;
[0125] S3: The liquid film after the pre-division is immersed in the curable liquid as the carrier for 35 seconds, and the curable liquid invades the inside of the liquid film and gradually diffuses inwardly, and then solidifys the formation of a porous film; the cured liquid comprises water and penetration additives. The permeation additive is a fluoropropyl hydropropylol; the permeation additive in the cured liquid is 46%;...
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