Highly co2-selective asymmetric polymeric membranes and process for preparing the same
AssigneeSogang University Research & Business Development Foundation
InventorsJong Suk LEE, Mun Suk Seong, Ju Ho Shin
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Abstract
The present invention, in preparing a medicinal Platycodon root powder, (i) decomposes the cell wall by enzyme treatment, (ii) forms an antimicrobial and moisture-protective layer through coating with grapefruit seed extract and fructooligosaccharide, and (iii) recovers and concentrates residual saponins through low-temperature extraction and re-mixing, thereby providing a powder having high saponin and flavonoid contents and excellent storage stability without high-heat processing. This powder has high utility as a material for medicinal Platycodon root syrup, powdered beverages, and health functional food ingredients.
Claims20
An asymmetric polymer separation membrane having high selectivity for carbon dioxide, comprising:
- a porous polymer support layer;
- an intermediate layer formed on the porous polymer support layer;
- and
- a selective layer formed on a surface of the intermediate layer,
- wherein the intermediate layer is modified to be hydrophilic, and
- wherein the selective layer is hydrophilic.
A method for producing an asymmetric polymer separation membrane having high selectivity for carbon dioxide, comprising:
- a step of forming an intermediate layer on a porous polymer support layer;
- and
- a step of forming a selective layer on the intermediate layer,
- wherein the intermediate layer is modified to be hydrophilic, and wherein the selective layer is hydrophilic.
Dependencies are inferred from the claim text.