Porous polymer material

Patent metadata

Field	Value
Publication number	US-9932454-B2
Application number	US-201615382675-A
Country	US
Kind code	B2
Filing date	Dec 18, 2016
Priority date	Sep 24, 2010
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

The present disclosure relates to a polymer material comprising mesopores extending between melamine-formaldehyde co-polymer nano-particles and wherein micropores extend within the co-polymer nano-particles, methods of producing the same and uses thereof.

First claim

What is claimed is:

1. A method of making a polymer material comprising a melamine-formaldehyde co-polymer, the method comprising the step of reacting melamine with formaldehyde in the presence of a non-aqueous polar solvent to form a polymer material comprising melamine-formaldehyde co-polymer comprising melamine-formaldehyde co-polymer nano-particles, wherein:
the polymer material comprising melamine-formaldehyde co-polymer is composed of repeating units of a monomer having a ring structure, each monomer ring structure comprising at least three melamine groups; and
the polymer material comprising the melamine-formaldehyde co-polymer comprises mesopores disposed between the melamine-formaldehyde co-polymer nano-particles, the mesopores extending within the co-polymer nano-particles.

2. The method as claimed in claim 1 , wherein the non-aqueous polar solvent is an aprotic solvent.

3. The method as claimed in claim 1 , wherein the reaction step is undertaken at a temperature of between 120° C. to 180° C.

4. The method as claimed in claim 1 , wherein the molar ratio of formaldehyde to melamine is in a range from 1 to 5.

5. The method as claimed in claim 4 , wherein the molar ratio of formaldehyde to melamine is in a range from 1.5 to 2.5.

6. The method as claimed in claim 1 , wherein said reacting step is undertaken for a period of from 48 hours to 120 hours.

7. The method as claimed in claim 1 , wherein the reaction step is undertaken in a closed pressure reactor.

8. The method as claimed in claim 1 , wherein the reaction step is undertaken in a partially heated reactor.

9. The method as claimed in claim 2 , wherein the aprotic solvent is selected from sulfoxides and sulfones.

10. The method as claimed in claim 2 , wherein the aprotic solvent is an aliphatic sulfoxide.

11. The method as claimed in claim 10 , wherein the aliphatic sulfoxide has 2 to 10 carbon atoms.

12. The method as claimed in claim 10 , wherein the aliphatic sulfoxide has 2 to 6 carbon atoms.

13. The method as claimed in claim 1 , wherein the aliphatic sulfoxide is dimethyl sulfoxide.

14. The method as claimed in claim 3 , wherein the non-aqueous polar solvent is provided in admixture with an aqueous medium.

15. The method as claimed in claim 14 , wherein the aqueous medium comprises water.

16. The method as claimed in claim 15 , wherein the aqueous medium has a volume ratio of polar solvent to water and the volume ratio of polar solvent to water is from 1:1 to 3:1.

Assignees

• Agency Science Tech & Res

Inventors

• Zhang Yugen
• Ying Jackie Y
• Tan Mei Xuan

Classifications

• C08G2101/00

  Manufacture of cellular products · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• B01J20/262

  obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation (macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds per se C08G) · CPC title

• B01J20/2808

  being less than 2 nm, i.e. micropores or nanopores · CPC title

• C08J9/286 Primary

  the liquid phase being a solvent for the monomers but not for the resulting macromolecular composition, i.e. macroporous or macroreticular polymers · CPC title