Boron nitride polymer composite foam derived from emulsions stabilized by boron nitride kinetic trapping

Patent metadata

Field	Value
Publication number	US-11355259-B2
Application number	US-202017066174-A
Country	US
Kind code	B2
Filing date	Oct 8, 2020
Priority date	May 30, 2014
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

The present disclosure provides advantageous graphene/graphite stabilized composites (e.g., graphene/graphite stabilized emulsion-templated foam composites), and improved methods for fabricating such graphene/graphite stabilized composites. More particularly, the present disclosure provides improved methods for fabricating pristine, graphene/graphite/polymer composite foams derived from emulsions stabilized by graphene/graphite kinetic trapping. In exemplary embodiments, the present disclosure provides that, instead of viewing the insolubility of pristine graphene/graphite as an obstacle to be overcome, it is utilized as a means to create or fabricate water/oil emulsions, with graphene/graphite stabilizing the spheres formed. These emulsions are then the frameworks used to make foam composites that have shown bulk conductivities up to about 2 S/m, as well as compressive moduli up to about 100 MPa and breaking strengths of over 1200 psi, with densities as low as about 0.25 g/cm3.

First claim

The invention claimed is:

1. A composite comprising:
a polymeric matrix material formed from a combination of boron nitride and a polymer that defines an open pore foam structure, the open pore foam structure having cavities completely lined with boron nitride;
wherein the boron nitride that completely lines the cavities of the open foam structure comprises overlapping layers or sheets that define a continuous film layer; and
wherein the polymeric matrix material having the open pore foam structure having cavities lined with boron nitride is a thermal conductor and an electrical insulator.

2. The composite of claim 1 , wherein the boron nitride is hexagonal boron nitride.

3. The composite of claim 1 , wherein the polymeric matrix material is formed from monomers selected from the group consisting of styrene, isoprene, butyl methacrylate, divinylbenzene, methyl acrylate, tetra(ethylene glycol) diacrylate, and butyl acrylate.

4. The composite of claim 1 , wherein the cavities of the polymeric matrix material include substantially spherical cavities.

5. The composite of claim 1 , wherein the polymeric matrix material has a bulk conductivity of about 2 S/m, a compressive modulus of about 100 MPa, and a breaking strength of at least about 1200 psi., and a density of about 0.25 g/cm 3 .

6. The composite of claim 1 , wherein the polymeric matrix defines a nano-composite.

7. The composite of claim 1 , wherein the polymeric matrix material defines a hollow nanocomposite.

8. The composite of claim 1 , wherein the polymeric matrix material is formed from a monomer and a cross-linking agent.

9. The composite of claim 1 , wherein the polymeric matrix is incorporated into a catalyst support.

10. The composite of claim 1 , wherein the polymeric matrix is incorporated into a filter.

11. The composite of claim 1 , wherein the polymeric matrix is incorporated into an industrial material.

12. The composite of claim 1 , wherein the polymeric matrix functions as a heat-sink for an electronic component.

13. The composite of claim 1 , wherein the polymeric matrix defines a flexible structure.

Assignees

• Univ Connecticut

Inventors

• Adamson Douglas H
• Woltornist Steven
• Dobrynin Andrey V

Classifications

• 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

• B82Y30/00

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

• B01J20/324

  containing free carbon, e.g. activated carbon · CPC title

• B01J20/261

  obtained by reactions only involving carbon to carbon unsaturated bonds (macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds per se C08F) · CPC title

• C09K5/14

  Solid materials, e.g. powdery or granular · CPC title