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Stretching conductive liquid metal particle based conductive ink and preparation method and application thereof

A technology of conductive ink and liquid metal, applied in the direction of application, ink, metal pattern materials, etc., can solve the problems of low utilization rate of liquid metal particles, rupture of liquid metal particles, low production efficiency, etc., and achieve high utilization rate, low cost, Simple operation effect

Active Publication Date: 2018-08-10
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The utilization rate of liquid metal particles in this method is extremely low, most of the liquid metal is wasted, and the production efficiency is low
And after the pattern is formed, the external disturbance may cause the liquid metal particles around the pattern to break, so that the place that does not need to conduct electricity will conduct electricity, resulting in serious consequences such as short circuit

Method used

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  • Stretching conductive liquid metal particle based conductive ink and preparation method and application thereof
  • Stretching conductive liquid metal particle based conductive ink and preparation method and application thereof
  • Stretching conductive liquid metal particle based conductive ink and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] This example is used to illustrate the liquid metal conductive ink and the use of the ink to prepare flexible conductive circuits.

[0067]Add 0.5g of polyvinylpyrrolidone into 10mL of n-decyl alcohol and stir for 6h to fully dissolve. After polyvinylpyrrolidone (PVP) was fully dissolved, 1 ml of the solution was placed in a plastic tube, and 3 g of liquid indium gallium eutectic alloy (Ga75.5%wt In 24.5%wt) was added at the same time. Using an ultrasonic cell breaker to sonicate for 60s at an amplitude of 30%, the metal is dispersed into numerous micronano-sized small particles, thereby obtaining a gray liquid metal ink. The core of the small particles is liquid metal, and the outside is covered by a thin oxide film. Pouring evenly mixed PDMS (mass ratio, prepolymer: curing agent = 10:1) on a glass plate, and curing in an oven at 80 degrees Celsius for 2 hours, after curing, peel off the PDMS from the glass plate to obtain PDMS. film. Use a manual screen printing st...

Embodiment 2

[0069] This example is used to illustrate the liquid metal conductive ink and the flexible and stretchable conductive circuit prepared using the ink.

[0070] Put 1g of polyvinylpyrrolidone, 5uL of fluorocarbon surfactant and 0.1g of chitosan in 10mL of tetrahydrofuran, and stir for 6 hours to fully dissolve. After the polyvinylpyrrolidone was fully dissolved, 1 mL of the solution was placed in a plastic tube, and 2 g of liquid indium gallium tin alloy (In 22%wt Ga 68%wt Sn 10%wt) was added at the same time. Ultrasonic cell breaker was used to sonicate at 30% amplitude for 30 minutes to obtain a gray liquid metal suspension, and the metal was dispersed into small particles of micro-nano size. Spread the aqueous polyurethane solution on a glass plate and place it at room temperature to dry for 12 hours to form a film. After the polyurethane film is formed, it is peeled off from the glass plate to obtain a polyurethane film. The prepared conductive ink was added to a piezoelect...

Embodiment 3

[0072] This example is used to illustrate the liquid metal conductive ink and the flexible and stretchable conductive circuit prepared using the ink.

[0073] Put 0.5g of thermoplastic polyurethane and 0.01g of N-(2-hydroxyethyl)dodecylamide into 10mL of N,N-dimethylformamide solution, stir well to dissolve. Take 1 mL of the solution and place it in a plastic tube, and add 2 g of gallium-zinc alloy (Ga95%wt Zn 5%wt) into the solution. The conductive ink was prepared according to the method of Example 1. Since the melting point of the gallium-zinc alloy (37 degrees Celsius) was slightly higher than room temperature, it was heated in an oven at 80 degrees Celsius for 30 minutes before ultrasonication. Thus, a conductive ink is obtained. Mix the components A and B of Ecoflex silica gel in equal quantities, stir well, apply on PET plastic film, and cure at room temperature for 6 hours to obtain Ecoflex silica gel film. Stick the stencil of the desired pattern on the Ecoflex film...

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Abstract

The invention provides stretching conductive liquid metal particle based conductive ink and a preparation method and application thereof. The conductive ink comprises liquid metal and macromolecular solution. The conductive ink is simple in preparation, low in cost, easy in patterning and applicable to various substrate materials, and the liquid metal is intrinsically excellent in conductivity, flexibility and stretching performance. The conductive ink is nontoxic and harmless to human bodies and capable of fitting the human bodies without causing adverse effects, provides conditions for large-scale manufacturing of flexible stretchable printed circuit boards, provides conditions for large-scale manufacturing and application of wearable electronic equipment and can be used for developmentof various mechanical sensors and artificial skin.

Description

technical field [0001] The invention belongs to the field of electronic materials, and in particular relates to a stretch-induced conductive ink based on liquid metal particles, a preparation method and application thereof. Background technique [0002] The emergence of text printing has greatly promoted the recording and dissemination of text, and brought mankind into the era of civilization. Then, after a long period of development, the emergence of printed circuits brought mankind into the era of electronic information. Now the most commonly used circuit printing method is to corrode circuit boards, but this method is more polluting, and the produced circuit boards do not have any elasticity, and it is increasingly difficult to meet the requirements of the combination of biotechnology and electronic technology. In order to meet the requirements of flexibility and elasticity of circuit boards, researchers use metal particles with superior conductivity such as gold and sil...

Claims

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Application Information

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IPC IPC(8): C09D11/52C09D11/03C09D11/106C09D11/102C09D11/107C09D11/104H05K1/09
CPCH05K1/095C09D11/03C09D11/102C09D11/104C09D11/106C09D11/107C09D11/52
Inventor 蒋兴宇唐立雪
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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