Flexible hexagonal boron nitride composites for additive manufacturing applications

Patent metadata

Field	Value
Publication number	US-2021038770-A1
Application number	US-201917049281-A
Country	US
Kind code	A1
Filing date	Apr 30, 2019
Priority date	Apr 30, 2018
Publication date	Feb 11, 2021
Grant date	—

Abstract

Thermal management composites and scaffolds for heat-generating implantable electronic devices made from the thermal management composites are provided. The composite materials are cytocompatible, porous materials that include hexagonal boron nitride particles dispersed in an elastomeric polymer binder.

First claim

What is claimed is:

1 . A biocompatible device comprising:
an implantable electronic device; and a thermally conductive, electrically insulating scaffold around at least a portion of the implantable electronic device, the scaffold comprising continuous flexible fibers of a cytocompatible composite, the cytocompatible composite comprising:
a biocompatible elastomeric polymer binder; and
hexagonal boron nitride particles dispersed in the biocompatible elastomeric polymer binder.

2 . The device of claim 1 , wherein the cytocompatible composite has a hexagonal boron nitride particle content in the range from 30 vol. % to 60 vol. %.

3 . The device of claim 1 , wherein the cytocompatible composite has a hexagonal boron nitride particle content in the range from 35 vol. % to 45 vol. %.

4 . The device of claim 1 , wherein the cytocompatible composite has a porosity in the range from 20% to 40%.

5 . The device of claim 1 , wherein the cytocompatible composite has a porosity in the range from 20% to 35%.

6 . The device of claim 2 , wherein the cytocompatible composite has a porosity in the range from 20% to 40%.

7 . The device of claim 6 , wherein the biocompatible elastomeric polymer binder is poly(lactic-co-glycolic acid).

8 . The device of claim 7 , wherein the cytocompatible composite has a thermal conductivity of at least 1.5 W/m-K.

9 . The device of claim 1 , wherein the one or more fibers have a cross-sectional diameter in the range from 50 μm to 500 μm.

10 . The device of claim 9 , wherein the one or more fibers have a circular or oval cross-section.

Assignees

• Univ Northwestern

Inventors

• Guiney Linda M
• Mansukhani Nikhita D
• Jakus Adam E
• Shah Ramille N
• Hersam Mark C

Classifications

• C08K3/38

  Boron-containing compounds · CPC title

• B33Y70/10

  Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials · CPC title

• A61L27/56

  Porous materials, {e.g. foams or sponges} · CPC title

• D01F6/625

  derived from hydroxy-carboxylic acids, e.g. lactones · CPC title

• A61M2205/3633

  thermally insulated · CPC title