CN115001306A - Light-weight triboelectric nano-generator based on paper folding structure and application thereof - Google Patents

Abstract

Based on a lightweight triboelectric nanogenerator with an origami structure and its application, the present invention aims to solve the technical problems that the existing nanogenerator structures are mostly rigid and have low power generation efficiency. The lightweight triboelectric nanogenerator based on the origami structure of the present invention comprises a substrate, a first friction layer and a second friction layer, wherein the material of the substrate is a PLA flexible film material, and creases are arranged on the substrate, and each friction layer is The pair consists of a first friction layer and a second friction layer arranged at intervals, the first friction layer and the second friction layer in each friction pair are arranged relative to the crease on the substrate, and the substrate is divided into four pieces by two axes of symmetry Small square areas where origami structures are formed along the folds on the substrate. The substrate of the invention is made by 3D printing and has a simple structure. The lightweight triboelectric nano-generator package forms a plurality of local friction pairs inside. Under the same pressure, compared with a single-mode generator, a larger electrical signal can be generated. Higher power generation efficiency.

Description

Lightweight triboelectric nanogenerators based on origami structures and their applications

technical field

The invention belongs to the field of nanogenerators, in particular to a lightweight triboelectric nanogenerator.

Background technique

With the continuous development and progress of science and technology, modern society is moving towards miniaturization, wireless and intelligence. However, the energy supply problem of widely used small smart devices has been urgently solved. Nanogenerators can convert tiny mechanical energy, which is often neglected in life, into electrical energy, providing a good solution to the above problems. And through various methods such as material selection and structure construction, nanogenerators can simultaneously have various properties such as flexibility, hydrophobicity, and shape memory. The common structural materials of today's nanogenerators are hard and the preparation process is cumbersome.

SUMMARY OF THE INVENTION

The invention aims to solve the technical problems that the existing nano-generator structures are mostly hard, the preparation process is cumbersome and the power generation efficiency is low, and the invention provides a light-weight triboelectric nano-generator based on an origami structure and its application.

The lightweight triboelectric nanogenerator based on the origami structure of the present invention comprises a substrate, a first friction layer and a second friction layer, wherein the material of the substrate is a PLA (polylactic acid) flexible film material, the substrate is a square, and the substrate is a square. There are creases on the surface, each friction pair is composed of a first friction layer and a second friction layer arranged at intervals, and the first friction layer and the second friction layer in each friction pair are set relative to the crease on the substrate, and the lining The bottom is divided into four small square areas by two symmetry axes, and the origami structure is formed along the folds on the substrate in the small square areas.

The application of the lightweight triboelectric nanogenerator based on the origami structure of the present invention is to use the lightweight triboelectric nanogenerator as a shock absorber to collect mechanical energy to generate electricity.

The light-weight triboelectric nanogenerator of the present invention converts mechanical energy into electrical energy based on the principles of triboelectric electrification and electrostatic induction. Lightweight triboelectric nanogenerators with origami structure are respectively pasted with two materials with different electronic gain and loss. When the overall structure is subjected to external force to make the two materials contact each other, the material with strong electron gain shows electronegativity; the weak electron gain shows electronegativity. The material is electrically positive. When the external force is weakened, the two materials are separated from each other, and equal and opposite charges will exist on the surfaces of the two materials, and then the electrodes attached to one side of the materials will be exported to the external circuit through the wires, forming a current and showing an electrical signal.

The light-weight triboelectric nano-generator based on the origami structure of the invention endows the generator with large deformation characteristics, and the overall structure has good resilience, and can be used as a shock absorber to collect mechanical energy to achieve the effect of generating electricity.

The lightweight triboelectric nanogenerator based on the origami structure of the present invention includes the following beneficial effects:

1. The raw materials used in the present invention are common, low in price, and simple in processing. The lightweight triboelectric nanogenerator has a simple overall structure and high reliability.

2. The substrate of the present invention is made by 3D printing, and the overall stiffness can be adjusted by reagent cleaning, so as to be suitable for different application scenarios.

3. A plurality of local friction pairs are formed inside the lightweight triboelectric nanogenerator package of the present invention. Under the same pressure, compared with a single-mode generator, a larger electrical signal can be generated, and the power generation efficiency is higher.

4. The substrate material in the lightweight triboelectric nanogenerator of the present invention is soft, combined with the origami bendable structure, has good resilience, can shrink through folds under pressure, and can effectively collect mechanical energy as a shock absorber to generate electricity.

5. The present invention has high durability, can be used repeatedly and maintains constant electrical output.

Description of drawings

1 is a schematic diagram of a crease on a substrate in an embodiment, wherein the bold line represents a crease folded downward (valley fold);

Fig. 2 is the schematic diagram of the sticking area of the friction layer on the substrate in the embodiment, wherein the area A represents the polytetrafluoroethylene film, and the area B represents the copper foil (copper tape);

3 is a schematic diagram of the overall structure of the lightweight triboelectric nanogenerator based on the origami structure of the embodiment;

Fig. 4 is the AC output voltage test chart of the lightweight triboelectric nanogenerator based on the origami structure of the embodiment;

FIG. 5 is a test diagram of the DC output voltage of the lightweight triboelectric nanogenerator based on the origami structure of the embodiment.

Detailed ways

Embodiment 1: The lightweight triboelectric nanogenerator based on the origami structure in this embodiment includes a substrate 1, a first friction layer 2-1 and a second friction layer 2-2, wherein the material of the substrate 1 is PLA (polyethylene Lactic acid) flexible film material, the substrate 1 is a square, and a crease is provided on the substrate 1, and each friction pair is composed of a first friction layer 2-1 and a second friction layer 2-2 arranged at intervals, and each friction pair is composed of a first friction layer 2-1 and a second friction layer 2-2 arranged at intervals. The first friction layer 2-1 and the second friction layer 2-2 in the center are arranged relative to the crease on the substrate 1. The substrate 1 is divided into four small square areas by two symmetry axes, and the small square area is along the substrate. The creases on 1 form the origami structure.

The substrate in the light-weight triboelectric nanogenerator based on the origami structure of this embodiment is obtained from PLA material (polylactic acid) through 3D printing technology, and the designed crease is engraved on it, and the resilience is good. The first friction layer and the second friction layer are pasted on both sides of the crease on the substrate at intervals to form a plurality of friction pairs. The nanogenerator of the invention has a large deformation effect, can be used as a shock absorption device to collect mechanical energy to generate electricity, and has good durability.

Embodiment 2: The difference between this embodiment and Embodiment 1 is that the substrate 1 is prepared by a 3D printing process.

Embodiment 3: The difference between this embodiment and Embodiment 2 is that the length×width of the substrate 1 is (100˜500 mm)×(100˜500 mm).

Embodiment 4: The difference between this embodiment and one of Embodiments 1 to 3 is that the first friction layer 2-1 and the second friction layer 2-2 are made of polyoxymethylene, ethyl cellulose, polyamide, melamine, Wool, silk, aluminum foil, paper, cotton, steel, wood, hard rubber, nickel, copper, silver, acetate, polymethyl methacrylate, polyvinyl alcohol, polyurethane, polyethylene terephthalate, polyethylene butyral, polyimide, polydimethylsiloxane or polytetrafluoroethylene, and the materials of the first friction layer 2-1 and the second friction layer 2-2 are different.

Embodiment 5: The difference between this embodiment and Embodiment 4 is that when the materials of the first friction layer 2-1 and the second friction layer 2-2 are insulating materials, conductive tapes are pasted on the surfaces of the friction layers as electrodes.

Embodiment 6: The difference between this embodiment and Embodiment 4 is that the material of the first friction layer 2-1 is a polytetrafluoroethylene film, and the material of the second friction layer 2-2 is a copper tape.

In this embodiment, a conductive tape is attached to one side of the polytetrafluoroethylene as an electrode.

Embodiment 7: The difference between this embodiment and one of Embodiments 1 to 6 is that the thicknesses of the first friction layer 2-1 and the second friction layer 2-2 are 0.5-1.5 mm.

Embodiment 8: The difference between this embodiment and one of Embodiments 1 to 6 is that the first friction layer 2-1 and the second friction layer 2-2 are pasted on the substrate 1 .

In this embodiment, a plurality of friction pairs are respectively drawn out of wires and integrated externally in a parallel manner.

Embodiment 9: The difference between this embodiment and one of Embodiments 1 to 8 is that a plurality of folds are symmetrically arranged along the (substrate) diagonal in each small square area to form a V-shaped origami structure, and the small square area The creases in are parallel to the sides of the square.

Example: The lightweight triboelectric nanogenerator based on the origami structure in this example includes a substrate 1, a first friction layer 2-1 and a second friction layer 2-2, wherein the material of the substrate 1 is PLA (polylactic acid) Flexible film material, the substrate 1 is a square, and there are creases on the substrate 1, wherein two creases are located on the diagonal line of the substrate 1, and each friction pair consists of a first friction layer 2-1 arranged at intervals and the second friction layer 2-2, the first friction layer 2-1 and the second friction layer 2-2 in each friction pair are arranged relative to the crease on the substrate 1, and the substrate 1 is divided into two parts by two axes of symmetry. There are four small square areas, and a plurality of creases are symmetrically arranged along the diagonal in each small square area to form a multi-layer V-shaped origami structure, and the creases in the small square areas are parallel to the sides of the square.

The thickness of the flexible substrate in this embodiment is 1 mm, which simultaneously plays a supporting role.

In this embodiment, the material of the first friction layer 2-1 is copper tape, which is used as a friction material and a conductive electrode at the same time; the material of the second friction layer 2-2 is a polytetrafluoroethylene film, which itself is non-conductive, and a conductive tape is pasted on its back. as an electrode.

In this embodiment, each friction pair is directly connected in parallel and then connected to an oscilloscope, an external force of 10 N is applied to the overall structure, and its open circuit voltage is measured. Before the substrate is folded, it is a square printing paper (70 g/m ² ) of 19.2 cm (side length), folded in eight equal parts, and the width of each friction layer is 2.2 cm. The AC output voltage of the lightweight triboelectric nanogenerator was directly measured to be 20V, and the output DC voltage after connecting the rectifier bridge was 13.5V.

The lightweight triboelectric nanogenerator of this embodiment has a large deformation effect, can be used as a shock absorption device to collect mechanical energy to generate electricity, and has good durability.

Claims (10)

1. A lightweight triboelectric nanogenerator based on an origami structure, characterized in that the lightweight triboelectric nanogenerator comprises a substrate (1), a first friction layer (2-1) and a second friction layer (2-2) ), wherein the material of the substrate (1) is a PLA flexible film material, the substrate (1) is a square, a crease is arranged on the substrate (1), and each friction pair is formed by a first friction layer (2) arranged at intervals -1) and the second friction layer (2-2), the first friction layer (2-1) and the second friction layer (2-2) in each friction pair are opposite to the crease on the substrate (1) Setting, the substrate (1) is divided into four small square areas by two symmetry axes, and an origami structure is formed in the small square areas along the crease on the substrate (1). 2. The lightweight triboelectric nanogenerator based on an origami structure according to claim 1, characterized in that the substrate (1) is prepared by a 3D printing process. 3 . The lightweight triboelectric nanogenerator based on origami structure according to claim 2 , wherein the length×width of the substrate (1) is (100～500mm)×(100～500mm). 4 . 4. The lightweight triboelectric nanogenerator based on origami structure according to claim 1, characterized in that the materials of the first friction layer (2-1) and the second friction layer (2-2) are polyoxymethylene, ethyl acetate Cellulose, polyamide, melamine, wool, silk, aluminum foil, paper, cotton, steel, wood, hard rubber, nickel, copper, silver, acetate, polymethyl methacrylate, polyvinyl alcohol, polyurethane, poly Diethanol phthalate, polyvinyl butyral, polyimide, polydimethylsiloxane or polytetrafluoroethylene, and the first friction layer (2-1) and the second friction layer (2- 2) The material is different. 5. The lightweight triboelectric nanogenerator based on an origami structure according to claim 4, characterized in that when the materials of the first friction layer (2-1) and the second friction layer (2-2) are insulating materials , and paste conductive tape on the surface of the friction layer as an electrode. 6. The lightweight triboelectric nanogenerator based on an origami structure according to claim 4, characterized in that the material of the first friction layer (2-1) is a polytetrafluoroethylene film, and the second friction layer (2-2 ) is made of copper tape. 7. The lightweight triboelectric nanogenerator based on origami structure according to claim 1, characterized in that the thickness of the first friction layer (2-1) and the second friction layer (2-2) is 0.5-1.5 mm . 8. The lightweight triboelectric nanogenerator based on an origami structure according to claim 1, characterized in that the first friction layer (2-1) and the second friction layer (2-2) are pasted on the substrate (1) superior. 9. The lightweight triboelectric nanogenerator based on an origami structure according to claim 1, characterized in that in each small square area, a plurality of folds are symmetrically arranged along a diagonal line to form a V-shaped origami structure, and the small square The creases in the area are parallel to the sides of the square. 10. Application of a lightweight triboelectric nanogenerator based on origami structure, characterized in that the lightweight triboelectric nanogenerator is used as a shock absorber to collect mechanical energy to generate electricity.

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