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A kind of three-dimensional stretchable conductive material and preparation method thereof

A conductive material, three-dimensional technology, applied in non-metallic conductors, organic material conductors, metal/alloy conductors, etc., can solve problems such as poor electrical property retention rate, and achieve the effect of good stability and excellent electrical conductivity

Active Publication Date: 2019-04-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the stretchability of the polyurethane sponge itself, this type of three-dimensional stretchable conductive material has a poor retention rate of electrical properties under large strains.

Method used

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  • A kind of three-dimensional stretchable conductive material and preparation method thereof
  • A kind of three-dimensional stretchable conductive material and preparation method thereof
  • A kind of three-dimensional stretchable conductive material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Configure 10wt% PU solution, the solvent is DMF and THF (mass ratio 2: 1), control the parameters of electrospinning, including the voltage is 15KV, the distance between the needle tip and the substrate is 40cm, and the advancing speed of the PU solution is 1ml / h, Control the spinning time so that the thickness of the obtained fiber mat is 50, 100, 150 μm, and dry it in an oven at 50° C. for 4 h.

[0031] Configure EDOT and FeCl 3 The ethanol solution, the concentration is 0.05g / mL respectively, the mixed solution is added dropwise on the above fiber mat until the solution soaks it, and it is dried at room temperature. With the volatilization of ethanol, a layer of PEDOT will be aggregated on the surface of the PU fiber mat. step, the content of PEDOT can be controlled, and the obtained fiber mat is ultrasonically washed in methanol to remove excess FeCl 3 and unreacted monomers, and dried at 40°C for 2 hours to obtain a conductive fiber mat with a PEDOT load of 10-30 ...

Embodiment 2

[0035] Get the PU / PEDOT conductive fiber pad that the PEDOT content that is prepared by the 50 μ m thick PU fiber pad in embodiment 1 is 30wt%, fix two wires at the two ends of above-mentioned material with silver paste, be placed in 120 ℃ of ovens for 30min The silver paste is cured to facilitate the measurement of the resistance of the material during the stretching process. Configure PDMS prepolymer (dimethylsilane prepolymer and curing agent are mixed uniformly at a mass ratio of 10:1). The above-mentioned conductive fiber mat was impregnated with vacuum assistance, vacuumed until no air bubbles were generated, and then placed at 70°C for a curing reaction for 40 minutes to obtain a stretchable PU fiber mat / PEDOT / PDMS composite material. Stretch the above material, test the resistance of the material every 10% of stretching, and plot the resistance relative to the initial state resistance (R / R 0 )-strain curve diagram, such as figure 1 As shown, when stretched 100%, the ...

Embodiment 3

[0037] Get the PU / PEDOT conductive fiber pad that the PEDOT content that is prepared by the 150 μm thick PU fiber pad in embodiment 1 is 30wt%, fix two wires at the two ends of above-mentioned material with silver paste, be placed in 120 ℃ of ovens for 30min The silver paste is cured to facilitate the measurement of the resistance of the material during the stretching process. Configure PDMS prepolymer (dimethylsilane prepolymer and curing agent are mixed uniformly at a mass ratio of 10:1). The above-mentioned conductive fiber mat was impregnated with vacuum assistance, vacuumed until no air bubbles were generated, and then placed at 70°C for a curing reaction for 40 minutes to obtain a stretchable PU fiber mat / PEDOT / PDMS composite material. Stretch the above material, test the resistance of the material every 10% of stretching, and plot the resistance relative to the initial state resistance (R / R 0 )-strain curve diagram, such as figure 2 As shown, when stretched 100%, the...

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Abstract

The invention relates to a composite conductive material and a preparation method thereof and particularly relates to a three-dimensional stretchable conductive material. The method comprises steps that polyurethane is dissolved in mixture of N, N-dimethyl formamide and tetrahydrofuran, through static spinning, a polyurethane fiber pad is acquired through electrospinning; conductive 3,4-polyethylene dioxythiophene is formed through interface polymerization at a surface of the fiber pad, polydimethylsiloxane is then backfilled, and the three-dimensional stretchable conductive material can be acquired. The method is advantaged in that not only can excellent conductivity be realized, but also excellent conductivity stability under large strain conditions can be realized.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, which belong to the field of chemical industry. Background technique [0002] With the development of microelectronics technology, traditional rigid electronic equipment can no longer meet people's needs, and new electronic equipment has begun to develop in the direction of flexibility and even stretchability, such as smart clothing, robot skin, and rollable e-books , strain sensors, stretchable solar cells, etc. As the core of stretchable electronic devices, stretchable conductive materials are receiving more and more attention. [0003] High-performance stretchable conductive materials need to have both high conductivity and good conductivity stability under deformation. In comparison, stable electrical properties are more difficult to achieve. Selecting flexible conductive components including carbon nanomaterials, metal nanowires, conductive polymers, and the structur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/12H01B1/02D06N3/00D06N3/04
CPCD06N3/0015D06N3/04H01B1/02H01B1/12
Inventor 张玲李春忠段莎莎王芝慧
Owner EAST CHINA UNIV OF SCI & TECH