Metal organic framework nanosheet and method for producing same

Patent metadata

Field	Value
Publication number	US-11389781-B2
Application number	US-201716319743-A
Country	US
Kind code	B2
Filing date	Jul 21, 2017
Priority date	Jul 22, 2016
Publication date	Jul 19, 2022
Grant date	Jul 19, 2022

Abstract

The present disclosure provides a method for producing a metal organic framework nanosheet, including forming a metal organic framework in a sheet form between two monolayers constituting a single bilayer membrane in a case where the bilayer membranes form a hyper-swollen lamellar phase in a solvent. The present disclosure relates to a metal organic framework nanosheet including a metal organic framework disposed, in a sheet form, between two monolayers constituting a single bilayer membrane, wherein a plurality of the bilayer membranes forms a hyper-swollen lamellar phase in a solvent.

First claim

The invention claimed is:

1. A metal organic framework nanosheet comprising a metal organic framework disposed, in a sheet form, between two monolayers constituting a single bilayer membrane, wherein
a plurality of the bilayer membranes forms a hyper-swollen lamellar phase in a solvent.

2. The metal organic framework nanosheet according to claim 1 , wherein the bilayer membranes are composed of a nonionic amphiphile.

3. The metal organic framework nanosheet according to claim 2 , wherein the nonionic amphiphile is at least one selected from the group consisting of an ester type surfactant, an ether type surfactant, an alkanolamide type surfactant, alkyl glycoside and a higher alcohol.

4. The metal organic framework nanosheet according to claim 3 , wherein the nonionic amphiphile is the ether type surfactant, and the ether type surfactant is at least one selected from the group consisting of polyethylene glycol monoalkyl ether and polyoxyethylene alkyl phenyl ether.

5. The metal organic framework nanosheet according to claim 1 , wherein the bilayer membranes are composed of polyethylene glycol monoalkyl ether represented by Formula (1) below:

where n denotes the number of carbon atoms in an alkyl group in a hydrophobic portion, and m denotes the number of ethylene oxides in a hydrophilic portion.

6. The metal organic framework nanosheet according to claim 5 , wherein 2<n/m<6.

7. The metal organic framework nanosheet according to claim 5 , wherein n is 12 and m is 5.

8. The metal organic framework nanosheet according to claim 1 , wherein the solvent includes water.

9. The metal organic framework nanosheet according to claim 5 , wherein n is 12 and m is 6, and furthermore, the solvent includes water and an organic solvent.

10. The metal organic framework nanosheet according to claim 6 , wherein the metal organic framework is a metal organic framework containing a highly lipophilic ligand as a component.

11. The metal organic framework nanosheet according to claim 1 , wherein the hyper-swollen lamellar phase has a lamellar structure in which a distance between any adjacent two of the bilayer membranes is 50 nm or more.

12. A metal organic framework nanosheet dispersion comprising at least one metal organic framework nanosheet in a dispersed state in a liquid, wherein
the metal organic framework nanosheet is the metal organic framework nanosheet according to claim 1 .

13. A gas separation membrane comprising the metal organic framework nanosheet according to claim 1 .

14. The gas separation membrane according to claim 13 , the gas separation membrane being for nitrogen separation or carbon dioxide separation.

15. The metal organic framework nanosheet according to claim 2 , wherein the nonionic amphiphile is an ester ether type surfactant.

16. The metal organic framework nanosheet according to claim 1 , wherein the solvent includes a solution of water mixed with a water-soluble organic solvent.

17. A method for producing a nanosheet, comprising forming a nanosheet between two monolayers constituting a single bilayer membrane
in a case where a plurality of the bilayer membranes forms a hyper-swollen lamellar phase in a solvent,
wherein the nanosheet is composed of a metal organic framework.

18. The method for producing the nanosheet according to claim 17 , wherein
the bilayer membranes are formed in the solvent,
an organic ligand is added in the solvent to form the hyper-swollen lamellar phase formed of the bilayer membranes, and
a metal ion is then added in the solvent to form the metal organic framework nanosheet between the two monolayers constituting the single bilayer membrane.

19. The method for producing the nanosheet according to claim 17 , wherein the bilayer membranes are removed after the metal organic framework nanosheet is formed between the two monolayers constituting the single bilayer membrane.

20. The method for producing the nanosheet according to claim 17 , wherein the bilayer membranes are composed of polyethylene glycol monoalkyl ether represented by Formula (1) below:

where n denotes the number of carbon atoms in an alkyl group in a hydrophobic portion, and m denotes the number of ethylene oxides in a hydrophilic portion.

21. The method for producing the nanosheet according to claim 20 , wherein 2<n/m<6.

22. The method for producing the nanosheet according to claim 20 , wherein n is 12 and m is 5.

23. The method for producing the nanosheet according to claim 18 , wherein the solvent includes water.

24. The method for producing the nanosheet according to claim 20 , wherein n is 12 and m is 6, and furthermore, the solvent includes water and an organic solvent.

25. The method for producing the nanosheet according to claim 17 , wherein the metal organic framework is a metal organic framework containing a highly lipophilic ligand as a component.

26. The method for producing the nanosheet according to claim 18 , wherein the solvent includes a solution of water mixed with a water-soluble organic solvent.

27. A method for producing a nanosheet comprising forming a nanosheet between two monolayers constituting a single bilayer membrane in a case where a plurality of the bilayer membranes forms a hyper-swollen lamellar phase in a solvent, wherein the nanosheet is composed of a metal oxide,
wherein the bilayer membranes are formed in the solvent, an amphiphile is added in the solvent to form the hyper-swollen lamellar phase formed of the bilayer membranes, and a metal-containing compound having an oxygen atom is then added in the solvent to form the metal oxide nanosheet between the two monolayers constituting the single bilayer membrane,
wherein the solvent includes a mixed solution of water and an organic solvent, and
wherein a surface-active auxiliary is further added in the solvent.

28. A method for producing a nanosheet comprising forming a nanosheet between two monolayers constituting a single bilayer membrane in a case where a plurality of the bilayer membranes forms a hyper-swollen lamellar phase in a solvent, wherein the nanosheet is composed of a metal oxide,
wherein the bilayer membranes are formed in the solvent, an amphiphile is added in the solvent to form the hyper-swollen lamellar phase formed of the bilayer membranes, and a metal-containing compound having an oxygen atom is then added in the solvent to form the metal oxide nanosheet between the two monolayers constituting the single bilayer membrane,
wherein the solvent includes a mixed solution of water and an organic solvent, and
wherein the amphiphile is an anionic amphiphile.

29. A method for producing a nanosheet comprising forming a nanosheet between two monolayers constituting a single bilayer membrane in a case where a plurality of the bilayer membranes forms a hyper-swollen lamellar phase in a solvent, wherein the nanosheet is composed of a metal,
wherein the bilayer membranes are formed in the solvent, an amphiphile is added in the solvent to form the hyper-swollen lamellar phase formed of the bilayer membranes, and a metal-containing compound having an oxygen atom is then added in the solvent to form the metal nanosheet betw

Assignees

• Japan Science & Tech Agency

Inventors

• Uchida Yoshiaki
• Nishiyama Norikazu
• OMIYA Takeru
• NAKAI Takuto

Classifications

• B01J20/28

  characterised by their form or physical properties · CPC title

• B01J20/26

  Synthetic macromolecular compounds · CPC title

• B01D53/04

  with stationary adsorbents {(B01D53/025 takes precedence)} · CPC title

• Y02C20/40

  of CO2 · CPC title

• B01D69/147

  containing embedded adsorbents · CPC title