Monolayer, composite, gas separation material, filter, gas separation device and method for manufacturing composite

Patent metadata

Field	Value
Publication number	US-2021213397-A1
Application number	US-202117217131-A
Country	US
Kind code	A1
Filing date	Mar 30, 2021
Priority date	Feb 25, 2016
Publication date	Jul 15, 2021
Grant date	—

Abstract

A monolayer membrane containing gelling polymer particles having at least one of a basic functional group and an acidic functional group, and having a thickness of less than 5 μm. A composite having a porous carrier and gelling polymer particles having at least any one of a basic functional group and an acidic functional group and filling up the surface pores of the porous carrier. The invention can provide a novel material capable of efficiently separating an acid gas from a mixed gas.

First claim

1 . A method of gas separation comprising supplying a mixed gas containing two or more gas components to a composite and allowing at least one gas component to selectively permeate the composite, wherein:
the composite has a porous carrier having an open pore diameter of less than 0.5 μm and a monolayer membrane containing gelling polymer particles having at least one of a basic functional group and an acidic functional group, and the gelling polymer particles fill up the surface pores of the porous carrier.

2 . The method according to claim 1 , wherein the gelling polymer particles are constituted by a polymer of a monomer component containing a monomer having an amino group and a monomer having a hydrophobic group, and the molar ratio of the amino group-having monomer to the hydrophobic group-having monomer is 1/95 to 95/5.

3 . The method according to claim 2 , wherein the amino group-having monomer is an N-(aminoalkyl)methacrylamide and the hydrophobic group-having monomer is an N-alkylacrylamide.

4 . The method according to claim 1 , wherein the gelling polymer particles are particles of a polymer compound infiltrated with a basic molecule.

5 . The method according to claim 1 , wherein the composite contains gelling polymer particles having an acidic functional group and gelling polymer particles having a basic functional group.

6 . The method according to claim 1 , wherein among the gelling polymer particles, a crosslinked structure is formed between at least a part of the gelling polymer particles.

7 . The method according to claim 1 , wherein the monolayer membrane contains a membrane stabilizer containing a polyvinylamine or a polyvinylamine derivative.

8 . The method according to claim 1 , wherein the composite contains a titanium crosslinking agent.

9 . The method according to claim 1 , wherein the pore diameter of the surface pores gradually reduces toward the inside of the porous carrier.

10 . The method according to claim 9 , wherein the porous carrier has an OH group in the surface thereof.

11 . The method according to claim 9 , wherein the porous carrier has a COOH group in the surface thereof.

12 . The method according to claim 9 , wherein the surface of the porous carrier is hydrophilized.

13 . The method according to claim 9 , wherein the mean square roughness of the composite surface is 5 μm or less.

14 . The method according to claim 1 , wherein the carbon dioxide permeance of the composite at 40° C. is 10 GPU or more and the nitrogen permeance of the composite at 40° C. is 100 GPU or less.

15 . The method according to claim 1 , wherein a plurality of the composites are connected in series.

Assignees

• Univ Kyushu Nat Univ Corp

Inventors

• Hoshino Yu
• Imamura Kazushi
• GYOBU Tomohiro
• Taniguchi Ikuo
• Hamasaki Akira
• Yamashita Chie
• Watanabe Takeshi
• Miura Yoshiko

Classifications

• B01D71/06 Primary

  Organic material · CPC title

• B01D71/4011

  Polymethylmethacrylate · CPC title

• B01D71/262

  Polypropylene · CPC title

• B01D69/1213

  Laminated layers · CPC title

• B01D71/261

  Polyethylene · CPC title