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A stretchable spring-like conductive wire and its preparation method

A technology for tension springs and conductive wires, which is applied in the field of conductive wires, can solve problems such as difficult large-scale production, rapid decline in conductivity, complex preparation process, etc., and achieve good application prospects, low cost, and excellent electrical conductivity.

Active Publication Date: 2019-10-15
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, stretchable conductive wires have achieved certain development. They are basically made by embedding graphene, carbon nanotubes, silver nanowires, etc. Its tensile properties are poor, and with the increase of elongation, the electrical conductivity decreases rapidly
In addition, its preparation process is relatively complicated, and it is not easy to produce on a large scale.

Method used

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  • A stretchable spring-like conductive wire and its preparation method
  • A stretchable spring-like conductive wire and its preparation method
  • A stretchable spring-like conductive wire and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of polymer solution: Take 4 grams of polyurethane pellets as the base, add 5 ml of N,N-dimethylformamide, heat in an oil bath at 70°C and stir to dissolve for 40 minutes to obtain a viscous solution of polyurethane;

[0021] (2) Preparation of polymer substrate: evenly coat the viscous solution of polyurethane prepared in step (1) on the screw with a pitch of 1 mm. Cool at room temperature to obtain a polymer substrate;

[0022] (3) Preparation of stretchable spring-like conductive wire: uniformly coat the conductive silver paste on the surface of the smooth polymer substrate obtained in step (2) once from top to bottom, dry it in an oven at 80°C for 20 minutes, and after cooling The polymer substrate to which the active material is attached is peeled off in the thread direction of the screw to obtain a spring-like conductive wire.

Embodiment 2

[0024] (1) Preparation of polymer solution: take 9 grams of polydimethylsiloxane prepolymer as the base, add 1 gram of curing agent, and obtain polydimethylsiloxane viscous;

[0025] (2) Preparation of polymer substrate: evenly coat the polydimethylsiloxane prepared in step (1) on the screw with a pitch of 0.7 mm, and after the mucus is leveled on the surface of the screw, put it in an oven for curing at 80°C 30 minutes, then room temperature cooling obtains polymer substrate;

[0026] (3) Preparation of stretchable spring-like conductive wire: uniformly coat the conductive silver paste on the surface of the smooth polymer substrate obtained in step (2) once from top to bottom, dry it in an oven at 80°C for 20 minutes, and after cooling The polymer substrate to which the active material is attached is peeled off in the thread direction of the screw to obtain a spring-like conductive wire.

Embodiment 3

[0028] (1) Preparation of polymer solution: Take 1 g of polyvinyl alcohol as the base, add 10 ml of deionized water, swell at room temperature for 12 hours, then heat and stir in an oil bath at 70°C for 3 hours to obtain a viscous solution of polyvinyl alcohol;

[0029] (2) Preparation of polymer substrate: Apply the viscous solution of polyvinyl alcohol prepared in step (1) evenly on the screw with a pitch of 2 mm. Minutes, followed by cooling at room temperature to obtain a polymer substrate;

[0030] (3) Preparation of stretchable spring-like conductive wire: uniformly coat the conductive silver paste on the surface of the smooth polymer substrate obtained in step (2) once from top to bottom, dry it in an oven at 80°C for 20 minutes, and after cooling The polymer substrate to which the active material is attached is peeled off in the thread direction of the screw to obtain a spring-like conductive wire.

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Abstract

The invention belongs to the technical field of conductive wires and particularly discloses an extension spring-shaped conductive wire and a preparation method thereof. The preparation method comprises the following steps: uniformly coating a mold plate with a polymer solution; by taking a polymer as a substrate, coating the substrate with a layer of a conductive activated material from top to bottom; finally implementing a peeling method, so as to obtain the extension spring-shaped conductive wire which is good in flexibility and extension property and excellent and stable in conductivity. The extension spring-shaped conductive wire prepared by using the mold plate method has a good application prospect because of simple preparation processes and easiness in on-scale production.

Description

technical field [0001] The invention belongs to the technical field of conductive wires, and in particular relates to a stretchable spring-shaped conductive wire and a preparation method thereof. Background technique [0002] Flexible, stretchable and wearable electronic devices have become the development trend of modern electronics. They are widely used in electronic skin, wearable display, smart clothes, medical sensing and other fields. Conductive wires, as their most basic and important components, urgently need to develop a conductive wire with simple preparation process, good conductivity, excellent tensile properties, and strong stability to meet the needs of the development of modern electronic technology. In recent years, stretchable conductive wires have achieved certain development. They are basically made by embedding graphene, carbon nanotubes, silver nanowires, etc. Its tensile properties are poor, and with the increase of elongation, the electrical conducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/22
Inventor 彭慧胜徐晓婕左勇
Owner FUDAN UNIV