Conductive composite and preparation method and application thereof

A conductive composite material and conductive material technology, applied in the field of flexible electronic materials, can solve the problems of poor conductivity, poor bonding force, and easy falling off of conductive materials, and achieve good durability and repeatability, enhanced bonding force, and hysteresis insignificant effect

Active Publication Date: 2019-10-18
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a conductive composite material and its preparation method and application, which solves the problem of poor bonding between the fabric substrate and the conductive material of the sensitive element of the existing flexible sensor, and the conductive material is easy to fall off, so that the conductivity of the conductive material is poor. question

Method used

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  • Conductive composite and preparation method and application thereof
  • Conductive composite and preparation method and application thereof
  • Conductive composite and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] This embodiment is the preparation of conductive composite material carbon nanotube-graphene / non-woven fabric. For specific preparation steps, please refer to figure 2 :

[0060] (1) Cleaning of non-woven fabrics: in deionized water at 60°C, ultrasonic cleaning was performed on the non-woven fabrics for 5 minutes at a frequency of 20 kHz.

[0061] (2) Non-woven fabric pretreatment: Dry the non-woven fabric saturated with isopropanol at 60°C for 12 hours, cut the NWF with a thickness of 150 μm into substrates with a size of 1.3 cm×2.6 cm for use.

[0062] (3) Ultrasonic nano-welding: In the first step, mix sodium dodecyl sulfate with a mass ratio of 1:10 and multi-walled carbon nanotubes (MWCNTs) or graphene (rGO) in a beaker, and then inject a volume fraction of 25% isopropanol in deionized water solvent, and the whole system was ultrasonically dispersed for 30 minutes to obtain a multi-walled carbon nanotube dispersion / graphene dispersion (0.1mg / ml);

[0063] In the...

Embodiment 2

[0068] This embodiment is the preparation of a flexible stress sensing device.

[0069] Adopt magnetron sputtering technology to prepare cross Cu electrode array on the surface of carbon nanotube-graphene / non-woven fabric provided in embodiment 1 by mask plate, then use silver paste to weld two copper wires on carbon nanotube-graphene / both sides of the non-woven fabric to obtain a flexible stress sensor, wherein the process parameters are sputtering power of 10W; gas flow of pure argon gas of 10sccn; air pressure of 0.5Pa; deposition time of 30min.

[0070] Figure 4 Schematic diagram of the structure of the flexible stress sensing device provided by Embodiment 2 of the present invention. Such as Figure 4 As shown, the structure of the flexible stress sensing device of the present invention includes: non-woven fabric substrate 1 , multi-walled carbon nanotubes 2 , graphene 3 , crossed Cu electrode array 4 , and copper wire 5 . The multi-walled carbon nanotubes 2 are fuse...

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Abstract

The invention relates to the technical field of flexible electronic materials, in particular to a conductive composite and a preparation method and application thereof. a conductive material of the conductive composite is melted to a base so that the conductive material and the base generate a strong molecular bond, which enhances binding force of the conductive material and the base; the conductive material rarely drops, so that the conductive composite has good durability and repeatability, and conductivity of the conductive composite is enhanced relatively. The conductive composite is highly sensitive to different stresses; after 2000 cycles, the relative conductivity change is still cyclic, hysteresis of strain loading and unloading is not significant, and stability and reliability aregood. Therefore, the conductive composite is applicable as a wearable flexible stress sensor in medical equipment and in real-time monitoring of health condition of the human body and stress changesof different parts.

Description

technical field [0001] The invention relates to the technical field of flexible electronic materials, in particular to a conductive composite material and its preparation method and application. Background technique [0002] With the improvement of the quality of life, people's requirements for clothing are not limited to concealing shame and keeping warm. "Functionalization", "intelligence", and "humanization" have become new fashions that people pursue. Smart textile research is an emerging discipline that combines textiles, biology, chemistry, medicine, electronic information and other fields. Smart clothing refers to the use of new textile materials and traditional textile technology, organically combining sensing technology, communication technology and material processing technology. , to develop multi-functional clothing products. Some experts believe that the development of smart clothing is a new starting point for the transformation and development of the textile ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/06G01L1/22
CPCD06M10/06G01L1/22Y02P90/30
Inventor 唐振华姚帝杰刘志钢胡松程范竞敏刘秋香唐新桂
Owner GUANGDONG UNIV OF TECH
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