Gas separation membrane with ladder-structured polysilsesquioxane and method for fabricating the same

Patent metadata

Field	Value
Publication number	US-9855532-B2
Application number	US-201514697363-A
Country	US
Kind code	B2
Filing date	Apr 27, 2015
Priority date	Oct 21, 2014
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

The present disclosure provides a gas separation membrane using a ladder-structured polysilsesquioxane in which organic functional groups are attached to a long siloxane chain and a method for fabricating the same. In accordance with the present disclosure, a free-standing ladder-structured polysilsesquioxane-based membrane with various functional groups can be fabricated for gas separations. The performance of the gas separation membrane can be controlled through a variety of combinations of the organic functional groups linked to the siloxane chain. In addition, by controlling the molecular structure of the gas separation membrane through mixing of the ladder-structured polysilsesquioxane with an amine compound or conventional glassy or rubbery polymers or through thermal/UV-curing, the permeability and selectivity of the gas separation membrane can be controlled selectively.

First claim

What is claimed is:

1. A gas separation membrane comprising a ladder-structured polysilsesquioxane with a photoinitiator photocured by irradiating UV.

2. The gas separation membrane according to claim 1 , wherein the ladder-structured polysilsesquioxane comprises one or more crosslinkable organic functional group as a side chain.

3. The gas separation membrane according to claim 1 , wherein the ladder-structured polysilsesquioxane is represented by Chemical Formula 1:

wherein each of R 1 , R 2 and R 3 is independently selected from a group consisting of an alkyl group, an allyl group, an amine group, a halogen, an alkyl halogen, a vinyl group, an aryl group, a polyethylene oxide group, a methacryl group, an acryl group and an epoxy group and at least one of the R 1 , the R 2 and the R 3 is a crosslinkable organic functional group selected from a group consisting of a vinyl group, an aryl group, a methacryl group, an acryl group and an epoxy group, and n is an integer from 1 to 10,000.

4. The gas separation membrane according to claim 1 , wherein the photoinitiator is in an amount of 1-3 wt % based on the total weight of the mixture.

5. The gas separation membrane according to claim 1 , wherein the photocuring is cationic photocuring or radical photocuring.

6. The gas separation membrane according to claim 1 , wherein the ladder-structured polysilsesquioxane comprises an epoxy group and cationic photocuring occurs via ring-opening polymerization of the epoxy group under the UV irradiation.

7. A gas separation membrane comprising a ladder-structured polysilsesquioxane, which comprises the ladder-structured polysilsesquioxane with a photoinitiator photocured by irradiating UV, wherein the ladder-structured polysilsesquioxane comprises a methacryl group and radical photocuring occurs under the UV irradiation.

8. The gas separation membrane according to claim 1 , wherein the gas separation membrane separates a gas selected from a group consisting of CO 2 , H 2 , He, O 2 , CH 4 , C 3 H 6 , C 3 H 8 and N 2 .

9. The gas separation membrane according to claim 1 , wherein the ladder-structured polysilsesquioxane is blended with rubbery or glassy polymer.

10. The gas separation membrane according to claim 1 , wherein the ladder-structured polysilsesquioxane has an intramolecular periodic chain-to-chain distance of about 12.7 to 13.4 Å.

11. The gas separation membrane according to claim 7 , wherein the ladder-structured polysilsesquioxane comprises one or more crosslinkable organic functional group as a side chain.

12. The gas separation membrane according to claim 7 , wherein the ladder-structured polysilsesquioxane is represented by Chemical Formula 1:

wherein each of R 1 , R 2 and R 3 is independently selected from a group consisting of an alkyl group, an allyl group, an amine group, a halogen, an alkyl halogen, a vinyl group, an aryl group, a polyethylene oxide group, a methacryl group, an acryl group and an epoxy group and at least one of the R 1 , the R 2 and the R 3 is a crosslinkable organic functional group selected from a group consisting of a vinyl group, an aryl group, a methacryl group, an acryl group and an epoxy group, and n is an integer from 1 to 10,000.

13. The gas separation membrane according to claim 7 , wherein the photoinitiator is in an amount of 1-3 wt % based on the total weight of the mixture.

14. The gas separation membrane according to claim 7 , wherein the gas separation membrane separates a gas selected from a group consisting of CO 2 , H 2 , He, O 2 , CH 4 , C 3 H 6 , C 3 H 8 and N 2 .

15. A gas separation membrane comprising a ladder-structured polysilsesquioxane with an amine compound thermally cured,
wherein the amine compound is one or more cage-like silsesquioxane selected from a group consisting of octaaminophenyl-T8-silsesquioxane, decaaminophenyl-T10-silsesquioxane and dodecaaminophenyl-T12-silsesquioxane.

16. The gas separation membrane according to claim 15 , wherein the thermal curing is performed at 210-280° C.

17. The gas separation membrane according to claim 15 , wherein the amine compound is in an amount of 20 wt % or less based on the total weight of the mixture.

Assignees

• Korea Inst Sci & Tech

Inventors

• Lee Jong Suk
• Hwang Seung Sang
• Lee Albert Sung Soo
• Park Sunghwan
• Park Sang Hee
• Lee Sanghyup

Classifications

• C08G77/18

  to alkoxy or aryloxy groups · CPC title

• B01D53/228

  characterised by specific membranes · CPC title

• B01D69/125 Primary

  In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction · CPC title

• B01D2323/08

  Specific temperatures applied · CPC title

• B01D2323/30

  Cross-linking · CPC title