Conductive composite, manufacturing method thereof, and electronic device including same

Patent metadata

Field	Value
Publication number	US-10020091-B2
Application number	US-201615190909-A
Country	US
Kind code	B2
Filing date	Jun 23, 2016
Priority date	Jan 29, 2016
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A conductive composite including: a polymer matrix including a microcellulose fiber; and at least two conductive nanomaterials dispersed in the polymer matrix, wherein the conductive nanomaterial includes a metal nanowire, wherein the at least two of the conductive nanomaterials provide an assembled layer surrounding a surface of the microcellulose fiber.

First claim

What is claimed is:

1. A conductive composite comprising:
a polymer matrix comprising a plurality of microcellulose fibers; and a plurality of conductive nanomaterials dispersed in the polymer matrix, wherein the plurality of conductive nanomaterials comprises a metal nanowire, and
wherein the plurality of conductive nanomaterials are disposed on a surface of the plurality of the microcellulose fibers,
wherein a diameter of the plurality of microcellulose fibers is about 1 micrometer to about 990 micrometers, and a diameter of the metal nanowire is about 1 nanometer to about 30 nanometers,
wherein the plurality of conductive nanomaterials provides an assembled layer surrounding a surface of the microcellulose fibers, and
wherein the assembled layer has a density gradient extending from a surface of the polymer matrix to the inside of the polymer matrix in such a way that the density of the assembled layer decreases from the surface of the polymer matrix to the inside of the polymer matrix, and
wherein an amount of the conductive nanomaterial in the conductive composite is about 0.005 percent by volume to about 0.80 percent by volume, based on a total volume of the conductive composite.

2. The conductive composite of claim 1 , wherein the metal nanowire comprises silver, gold, platinum, palladium, cobalt, nickel, titanium, copper, tantalum, tungsten, or a combination thereof.

3. The conductive composite of claim 2 , wherein the plurality of conductive nanomaterials further comprise a carbon nanotube, a graphene nanoparticle, a carbon nanofiber, carbon black, or a combination thereof.

4. The conductive composite of claim 3 , wherein the carbon nanotube comprises a single-walled carbon nanotube (SWNT), a multi-walled carbon nanotube (MWNT), or a combination thereof.

5. The conductive composite of claim 3 , wherein a diameter of the carbon nanotube is about 1 nanometer to about 20 nanometers.

6. The conductive composite of claim 3 , wherein the assembled layer comprises at least two layers wherein the metal nanowire and the carbon nanotube are alternately stacked.

7. The conductive composite of claim 1 , wherein the amount of the conductive nanomaterial in the conductive composite is about 0.01 percent by volume to about 0.53 percent by volume, based on a total volume of the conductive composite.

8. The conductive composite of claim 1 , wherein the polymer matrix is a cellulose fiber non-woven fabric.

9. The conductive composite of claim 1 , wherein a porosity of the conductive composite is about 20% to about 90%.

10. The conductive composite of claim 1 , wherein an apparent density of the conductive composite is less than or equal to about 0.6 grams per cubic centimeter.

11. The conductive composite of claim 1 , wherein an electro-conductivity of the conductive composite is greater than or equal to about 0.34 Siemens per centimeter.

12. A method of manufacturing a conductive composite, comprising:
providing a polymer matrix comprising a plurality of microcellulose fibers;
forming a plurality of conductive nanomaterials dispersed in the polymer matrix, the plurality of conductive nanomaterials comprising a metal nanowire, and the forming of the plurality of conductive nanomaterials including contacting the polymer matrix with a conductive nanomaterial solution comprising the metal nanowire to form a layer of the conductive nanomaterial disposed on the surface of the polymer matrix; and
drying the layer of the conductive nanomaterial disposed on a surface of the polymer matrix to provide the conductive composite,
wherein the plurality of conductive nanomaterials are disposed on a surface of the plurality of microcellulose fibers,
wherein a diameter of the plurality of microcellulose fibers is about 1 micrometer to about 990 micrometers, and a diameter of the metal nanowire is about 1 nanometer to about 30 nanometers,
wherein the plurality of conductive nanomaterials provide an assembled layer surrounding a surface of the plurality of microcellulose fibers,
wherein the assembled layer has a density gradient extending from the surface of the polymer matrix to the inside of the polymer matrix in such a way that the density of the assembled layer decreases from the surface of the polymer matrix to the inside of the polymer matrix, and
wherein an amount of the conductive nanomaterial in the conductive composite is about 0.005 percent by volume to about 0.80 percent by volume, based on a total volume of the conductive composite.

13. The method of claim 12 , wherein the conductive nanomaterial solution further comprises a carbon nanotube, a graphene nanoparticle, a carbon nanofiber, carbon black, or a combination thereof.

14. The method of claim 12 , wherein the method further comprises:
determining whether the contacting and drying are repeatedly carried out after the drying.

15. An electronic device comprising the conductive composite of claim 2 .

16. A conductive composite comprising:
a polymer matrix comprising a plurality of microcellulose fibers; and
a conductive nanomaterial dispersed in the polymer matrix,
wherein a diameter of the plurality of microcellulose fibers is about 1 micrometer to about 990 micrometers,
wherein a diameter of the conductive nanomaterial is about 1 nanometer to about 30 nanometers,
wherein the conductive nanomaterial is positioned on each of the plurality of microcellulose fibers,
wherein the conductive nanomaterial shows a density gradient extending from a surface of the polymer matrix to an inside of the polymer matrix, and
wherein an apparent density of the conductive composite is less than or equal to about 0.65 grams per cubic centimeter.

17. The conductive composite of claim 16 , wherein the conductive nanomaterial comprises a metal nanowire, a carbon nanotube, a graphene nanoparticle, a carbon nanofiber, carbon black, or a combination thereof.

Assignees

• Samsung Electronics Co Ltd
• The Industry & Academic Cooperation In Chungnam National Univ

Inventors

• Lee Sang Eui
• JEONG Yeonggyu
• Moon Kyoung-Seok
• Sohn Hiesang
• Lee Taewon
• Han In Taek

Classifications

• H01B1/22

  the conductive material comprising metals or alloys · CPC title

• H01B1/24 Primary

  the conductive material comprising carbon-silicon compounds, carbon or silicon · CPC title

• Y10S977/762

  Nanowire or quantum wire, i.e. axially elongated structure having two dimensions of 100 nm or less · CPC title

• Y10S977/783

  Organic host/matrix, e.g. lipid · CPC title

• Y10S977/932

  for electronic or optoelectronic application · CPC title