# US 12,180,359 B1 · Electrically conductive hydrogel composition, self healing electrically conductive hydrogel prepared therefrom, and hydrogel-based triboelectric nanogenerator

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- Number: US 12,180,359 B1
- Document ID: US12180359B1
- Status: Granted
- Kind: B1
- Application number: 18/479,442
- Filed: 2023-10-02
- Granted: 2024-12-31
- Earliest claimed: 2023-07-20
- Assignees: Ming Chi University of Technology
- Applicants: Ming Chi University of Technology
- Inventors: Meng-Fang Lin; Feng-Xiang Yeh; Jun-Jie Zhang; Priyanka Chaudhary
- Web page: https://patentgrep.com/patent/US12180359B1

## CPC

- C08L 29/04: Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
- H01B 1/24: the conductive material comprising carbon-silicon compounds, carbon or silicon
- C08K 3/04: Carbon
- C08K 3/16: Halogen-containing compounds
- C08K 5/053: Polyhydroxylic alcohols
- C08K 5/1545: Six-membered rings
- C08K 5/17: Amines; Quaternary ammonium compounds
- C08L 2203/20: use in electrical or conductive gadgets
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A electrically conductive hydrogel composition includes: a polar polymer selected from the group consisting of polyvinyl alcohol, polyacrylic acid, polyethylene oxide, poly(2-acrylamido-2-methyl-1-propane sulfonic acid), and combinations thereof; a gelatin; a binding agent including tannic acid and dopamine; a hygroscopic agent including ethylene glycol; a strong electrolyte; and water. A self-healing electrically conductive hydrogel prepared from the electrically conductive hydrogel composition is also provided. A hydrogel-based triboelectric nanogenerator including a self-healing electrically conductive hydrogel film that is made from the self-healing electrically conductive hydrogel is also provided.

## Claims

### Claim 1

An electrically conductive hydrogel composition, comprising:
a polar polymer selected from the group consisting of polyvinyl alcohol, polyacrylic acid, polyethylene oxide, poly(2-acrylamido-2-methyl-1-propane sulfonic acid), and combinations thereof;
a gelatin;
a binding agent including tannic acid and dopamine;
a hygroscopic agent including ethylene glycol;
an electrolyte; and
water.

### Claim 2 (depends on 1)

The electrically conductive hydrogel composition as claimed in claim 1, further comprising, carbon nanoparticles.

### Claim 3 (depends on 2)

The electrically conductive hydrogel composition as claimed in claim 2, wherein the polar polymer is polyvinyl alcohol that is present in an amount ranging from 22.3 wt % to 27.3 wt % based on 100 wt % of the electrically conductive hydrogel composition.

### Claim 4 (depends on 2)

The electrically conductive hydrogel composition as claimed in claim 2, wherein the gelatin is present in an amount ranging from 0.09 wt % to 0.15 wt % based on 100 wt % of the electrically conductive hydrogel composition.

### Claim 5 (depends on 2)

The electrically conductive hydrogel composition as claimed in claim 2, wherein the tannic acid is present in an amount ranging from 0.31 wt % to 0.39 wt % based on 100 wt % of the electrically conductive hydrogel composition.

### Claim 6 (depends on 2)

The electrically conductive hydrogel composition as claimed in claim 2, wherein the dopamine is present in an amount ranging from 0.09 wt % to 0.15 wt % based on 100 wt % of the electrically conductive hydrogel composition.

### Claim 7 (depends on 2)

The electrically conductive hydrogel composition as claimed in claim 2, wherein the electrolyte is present in an amount ranging from 3.1 wt % to 3.9 wt % based on 100 wt % of the electrically conductive hydrogel composition.

### Claim 8 (depends on 2)

The electrically conductive hydrogel composition as claimed in claim 2, wherein the carbon nanoparticles are present in an amount ranging from 0.036 wt % to 0.044 wt % based on 100 wt % of the electrically conductive hydrogel composition.

### Claim 9 (depends on 1)

The electrically conductive hydrogel composition as claimed in claim 1, wherein the electrolyte is selected from the group consisting of sodium chloride, sodium nitrate, lithium chloride, lithium bis(trifluoromethanesulfonyl) imide, iron (III) chloride, and combinations thereof.

### Claim 10 (depends on 1)

The electrically conductive hydrogel composition as claimed in claim 1, wherein a weight ratio of water to ethylene glycol ranges from 6:1 to 11:1.

### Claim 11 (depends on 1)

A self-healing electrically conductive hydrogel, which is prepared from an electrically conductive hydrogel composition as claimed in claim 1.

### Claim 12 (depends on 11)

A hydrogel-based triboelectric nanogenerator, comprising a self-healing electrically conductive hydrogel film that is made from a self-healing electrically conductive hydrogel as claimed in claim 11.