Filler particles for polymers

Patent metadata

Field	Value
Publication number	US-12139569-B2
Application number	US-202217675055-A
Country	US
Kind code	B2
Filing date	Feb 18, 2022
Priority date	Dec 28, 2017
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

A method of forming a composite material includes photo-initiating a polymerization of a monomer in a pattern of interconnected units to form a polymer microlattice. Unpolymerized monomer is removed from the polymer microlattice. The polymer microlattice is coated with a metal. The metal-coated polymer microlattice is dispersed in a polymer matrix.

First claim

What is claimed is:

1. A method comprising:
photo-initiating a polymerization of a monomer to form a polymer microlattice;
coating the polymer microlattice with a metal;
removing the polymer microlattice to form a metal microlattice;
depositing a ceramic material on the metal microlattice; and
removing the metal microlattice to form a microstructure of the ceramic material.

2. The method of claim 1 , wherein the photo-initiating including passing collimated light through a photomask.

3. The method of claim 1 , wherein the photo-initiating including multi-photon lithography.

4. The method of claim 1 , wherein coating the polymer microlattice with a metal comprises an electroless deposition of copper.

5. The method of claim 1 , wherein coating the polymer microlattice with a metal comprises an electroless deposition of nickel.

6. The method of claim 1 , wherein the polymer microlattice comprises polystyrene.

7. The method of claim 1 , wherein the polymer microlattice comprises poly(methyl methacrylate).

8. The method of claim 1 , wherein the ceramic material includes graphitic carbon.

9. The method of claim 1 , wherein the ceramic material includes hexagonal boron nitride.

10. The method of claim 1 , wherein the ceramic material includes at least one of: an aluminum oxide material, a zirconium oxide material, or a titanium oxide material.

11. The method of claim 1 , wherein depositing the ceramic material on the metal microlattice includes at least one of: an atomic layer deposition operation, or a chemical vapor deposition operation.

12. The method of claim 1 , further comprising performing a surface treatment operation on the metal microlattice.

13. The method of claim 12 , wherein the performing a surface treatment operation on the metal microlattice includes functionalizing a surface of the metal microlattice.

14. The method of claim 13 , wherein functionalizing a surface of the metal microlattice includes exposing the surface to a mercaptan-based compound.

15. The method of claim 14 , wherein the mercaptan-based compound includes at least one of: a hydroxylated alkyl mercaptan, or an isocyanate-based mercaptan.

16. The method of claim 1 , further comprising dispersing the microstructure of the ceramic material in a polymer matrix.

Assignees

• Texas Instruments Inc

Inventors

• Dadvand Nazila
• Cook Benjamin Stassen
• Venugopal Archana
• Colombo Luigi

Classifications

• C08J5/005

  Reinforced macromolecular compounds with nanosized materials, e.g. nanoparticles, nanofibres, nanotubes, nanowires, nanorods or nanolayered materials · CPC title

• C08K3/042

  Graphene or derivatives, e.g. graphene oxides · CPC title

• C08K2003/085

  Copper · CPC title

• C08K2201/013

  Additives applied to the surface of polymers or polymer particles · CPC title

• G03F1/78

  by charged particle beam [CPB], e.g. electron beam patterning of masks · CPC title