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Tensile conductive cable and manufacturing method thereof

A technology of cables and conductive fillers, which is applied in the field of preparation of flexible and stretchable conductive composite materials, can solve the problems of high resistance of stretchable conductive materials, and achieve the effect of simple process and high conductivity

Inactive Publication Date: 2016-11-16
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the thinner attached conductive layer, the resistance of the stretchable conductive material prepared by this method is usually large, and limited by the mechanical properties of the conductive layer material itself, the maximum strain that the material can withstand is usually less than 20%.

Method used

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  • Tensile conductive cable and manufacturing method thereof
  • Tensile conductive cable and manufacturing method thereof
  • Tensile conductive cable and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the preparation of material

[0021] (1) Take the following materials according to volume percentage: 80% of SEBS elastomer, 15% of copper nanosheets coated with silver, and 5% of carbon nanotubes;

[0022] (2) Use N,N-dimethylformamide as solvent to prepare SEBS solution and conductive filler dispersion respectively, mix the two evenly and then pour them into ethanol for flocculation, after filtering, drying and pelletizing Obtain the conductive composite material masterbatch;

[0023] (3) The obtained composite material masterbatch is hot-pressed at 200°C and 10MPa to form a film, and the film thickness is controlled by using different molds;

[0024] (4) Cut the obtained composite material film into strips with a width of 2mm, fix one end thereof, connect the other end to a motor to rotate around an axis, and twist to form a line. The number of rotations of the motor is controlled so that the strip of composite material shrinks by 20% in its length di...

Embodiment 2

[0025] Example 2: Conductivity Test of Stretchable Cables Containing Different Volume Fractions of Conductive Fillers

[0026] For the stretchable conductive cables containing different volume fractions of conductive fillers prepared according to the test method described in Example 1, the volume conductivity was tested respectively, and the typical results are shown in the attached figure 2 Shown: The lower curve represents the binary composite system in which the conductive filler is only silver-coated copper nanosheets. It can be seen that as the filler content increases, the conductivity of the stretchable wire increases gradually; the upper curve represents the conductive filler is silver For the ternary composite system of copper-coated nanosheets and carbon nanotubes, it can be seen that when the total volume of the conductive filler is the same, the conductivity of the ternary composite system is higher than that of the binary composite system. The measured volume con...

Embodiment 3

[0027] Example 3: Testing the Influence of Alternate Stretch and Release Cycles on Conductivity of Stretchable Conductive Cables

[0028] The stretchable conductive cable prepared according to the method described in Example 1 was uniaxially stretched to 100% strain, and then the tensile force was released to make the elastic conductive cable retract to the initial test length, and its conductivity was tested. Repeat the stretching and release experiments 10,000 times, and the results of the impact of the cycle test on the conductivity are shown in the attached image 3 , After 10,000 cycles of stretching and release, the change in conductance is less than 10%.

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Abstract

The invention discloses a tensile conductive cable and a manufacturing method thereof, which belong to the field of tensile electronics. An elastic matrix and a conductive filler are composite to form the conductive cable. A thermoplastic elastomer is selected as the matrix, and the filler selects a one-dimensional linear or two-dimensional plate-like nano material with high intrinsic conductivity and a high aspect ratio. The manufacturing process comprises steps: the elastic matrix and the conductive filler are mixed to obtain a master batch; then, the obtained blend master batch is used for manufacturing a conductive composite material thin film; and finally, the obtained conductive composite material thin film is cut into ribbons, the ribbons are then twisted into lines, and the tensile conductive cable is manufactured. The conductive composite material cable can be applied to conductive connection of flexible and tensile electronic devices, has advantages of light weight, low cost and the like, has good comprehensive use performance such as high conductivity and high conductive stability under tensile strain, the manufacturing process is simple and free of pollution.

Description

technical field [0001] The invention relates to the field of stretchable electronics, in particular to a preparation scheme of a flexible and stretchable conductive composite material and the application of the composite material in flexible electronic devices. Background technique [0002] At present, with the rapid development of information technology and intelligent technology, flexible and wearable electronic products such as sensors, drivers, and displays have become a research and development hotspot in the field of electronic devices. The first requirement for flexible electronics is that the integrated circuit can function properly under deformations such as stretching, bending, and torsion. Therefore, the development of conductive materials that can withstand arbitrary mechanical deformation, and then the design of flexible circuits, is an important basis for the development and preparation of flexible electronic devices. [0003] In traditional electronic devices...

Claims

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Application Information

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IPC IPC(8): H01L23/538H01L21/768
CPCH01L23/538H01L21/768
Inventor 王东瑞邓晶晶熊思来党智敏
Owner UNIV OF SCI & TECH BEIJING
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