Title:
SEPARATION MEMBRANE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2024/043218
Kind Code:
A1
Abstract:
A separation membrane is used in deaeration methods for removing a gas dissolved in a liquid, and gas exchange methods for exchanging a gas dissolved in a liquid and a gas component in a gas phase. The present invention provides a separation membrane that has solvent resistance and maintains high gas permeability performance by using poly(4-methyl-1-pentene), which excels in solvent resistance and gas permeability. The separation membrane contains poly(4-methyl-1-pentene) as a main component, and includes surface layers and an inner layer. At least one of the surface layers includes lamella crystals, and the surface layer including the lamella crystals has micropores. Defining porosity as the percentage of micropores in the membrane surface with the membrane surface being 100%, the porosity is 0.1% to 10%. The average pore diameter of the micropores is 3 nm to 30 nm.
Inventors:
AKUTSU MIKU (JP)
AOYAMA SHIGERU (JP)
TAGUCHI MARINA (JP)
AOYAMA SHIGERU (JP)
TAGUCHI MARINA (JP)
Application Number:
PCT/JP2023/030076
Publication Date:
February 29, 2024
Filing Date:
August 22, 2023
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D69/00; B01D69/02; B01D69/08; B01D71/26; D01F6/04
Foreign References:
| JP2010269307A | 2010-12-02 | |||
| JPH06246139A | 1994-09-06 | |||
| JPH06246140A | 1994-09-06 | |||
| JP2017516652A | 2017-06-22 | |||
| JP2002535115A | 2002-10-22 | |||
| US6409921B1 | 2002-06-25 |
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