Hyperelastic binder for printed, stretchable electronics

Patent metadata

Field	Value
Publication number	US-11678436-B2
Application number	US-202117500931-A
Country	US
Kind code	B2
Filing date	Oct 13, 2021
Priority date	Nov 21, 2016
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

Disclosed are compositions, devices, systems and fabrication methods for stretchable composite materials and stretchable electronics devices. In some aspects, an elastic composite material for a stretchable electronics device includes a first material having a particular electrical, mechanical or optical property; and a multi-block copolymer configured to form a hyperelastic binder that creates contact between the first material and the multi-block copolymer, in which the elastic composite material is structured to stretch at least 500% in at least one direction of the material and to exhibit the particular electrical, mechanical or optical property imparted from the first material. In some aspects, the stretchable electronics device includes a stretchable battery, biofuel cell, sensor, supercapacitor or other device able to be mounted to skin, clothing or other surface of a user or object.

First claim

What is claimed is:

1. An elastic composite material, comprising:
a first material having a particular electrical, mechanical or optical property; and
a multi-block copolymer configured to form a hyperelastic binder that creates contact between the first material and the multi-block copolymer,
wherein the elastic composite material is structured to stretch at least 500% in at least one direction of the material and to exhibit the particular electrical, mechanical or optical property imparted from the first material, wherein the multi-block copolymer includes polystyrene-polyisoprene-polystyrene (SIS).

2. The elastic composite material of claim 1 , wherein a % wt of the first material is at least 60% and a % wt of the multi-block copolymer is at most 40%.

3. The elastic composite material of claim 1 , wherein a % wt of the first material is at least 80% and a % wt of the multi-block copolymer is at most 20%.

4. The elastic composite material of claim 1 , wherein the elastic composite material is structured to stretch at least 1000% in the at least one direction.

5. The elastic composite material of claim 1 , wherein the elastic composite material is structured to stretch at least 500% in at least two directions.

6. The elastic composite material of claim 5 , wherein the at least two directions are perpendicular.

7. The elastic composite material of claim 1 , wherein the multi-block copolymer includes a thermoplastic elastomer including styrene-ethylene/butylene-styrene (SEBS) block copolymer, styrene-ethylene/propylene-styrene (SEPS), or styrene-butadiene-styrene (SBS) block copolymer.

8. The elastic composite material of claim 1 , wherein the first material includes an electrical conductor, an electrical insulator, a dielectric, a ceramic, or a semiconductor.

9. The elastic composite material of claim 1 , further comprising one or more additive materials.

10. The elastic composite material of claim 9 , wherein a % wt of the first material is at least 75%, a % wt of the multi-block copolymer is at most 20%, and a % wt of the one or more additive materials is between 0.1% and 10%.

11. The elastic composite material of claim 9 , wherein the one or more additive materials includes a metal, a semiconductor, an organic polymer, an inorganic polymer, a ceramic, or a composite material.

12. The elastic composite material of claim 9 , wherein the one or more additive materials includes a nanoparticle, a nanowire, a nanofiber, or a nanoflake.

13. The elastic composite material of claim 9 , wherein the one or more additive materials includes a mineral oil, and a % wt of the mineral oil is between 1% and 2% of the elastic composite material.

14. The elastic composite material of claim 9 , wherein the one or more additive materials includes zinc oxide and bismuth oxide, and a % wt of the zinc oxide and bismuth oxide is each between 5% and 10%.

15. The elastic composite material of claim 9 , wherein the one or more additive materials includes a color agent.

16. The elastic composite material of claim 1 , wherein the multi-block copolymer forms a hyperelastic binder that creates contacts between particles of the first material within a network formed by the multi-block copolymer.

17. The elastic composite material of claim 1 , wherein the elastic composite material does not include a cross-linker for cross-linking strands of a polymer in the elastic composite material.

18. The elastic composite material of claim 1 , wherein the elastic composite material is in the form of a printable ink.

19. An elastic composite material, comprising:
a first material having a particular electrical, mechanical or optical property;
a multi-block copolymer configured to form a hyperelastic binder that creates contact between the first material and the multi-block copolymer; and
one or more additive materials,
wherein the elastic composite material is structured to stretch at least 500% in at least one direction of the material and to exhibit the particular electrical, mechanical or optical property imparted from the first material,
the one or more additive materials includes a mineral oil, and
a % wt of the mineral oil is between 1% and 2% of the elastic composite material.

20. An elastic composite material, comprising:
a first material having a particular electrical, mechanical or optical property;
a multi-block copolymer configured to form a hyperelastic binder that creates contact between the first material and the multi-block copolymer; and
one or more additive materials,
wherein the elastic composite material is structured to stretch at least 500% in at least one direction of the material and to exhibit the particular electrical, mechanical or optical property imparted from the first material,
the one or more additive materials includes zinc oxide and bismuth oxide, and
a % wt of the zinc oxide and bismuth oxide is each between 5% and 10%.

Assignees

• Univ California

Inventors

• Wang Joseph
• Kumar Rajan
• Meng Ying Shirley
• Shin Jae Wook
• Yin Lu

Classifications

• C08L53/02

  of vinyl-aromatic monomers and conjugated dienes · CPC title

• H05K2201/0314

  Elastomeric connector or conductor, e.g. rubber with metallic filler · CPC title

• H05K1/0393

  Flexible materials (H05K1/038 takes precedence; specific organic compositions are classified in H05K1/0313 and subgroups) · CPC title

• C08F297/046

  polymerising vinyl aromatic monomers and isoprene, optionally with other conjugated dienes · CPC title

• H01M4/663

  containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres · CPC title