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Preparation method of a highly conductive tensile strain responsive material

A technology of tensile strain and high conductivity, which is applied in the field of preparation of highly conductive tensile strain response materials, can solve the problems of sensitivity and stability to be further improved, and achieve good axial conductivity, good flexibility and excellent performance.

Active Publication Date: 2021-06-22
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its good flexibility and processability, and its performance is easy to control, polymer conductive composite materials are often used as sensitive materials for flexible force-sensitive sensors, but the sensitivity and stability of existing materials still need to be further improved.

Method used

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  • Preparation method of a highly conductive tensile strain responsive material
  • Preparation method of a highly conductive tensile strain responsive material
  • Preparation method of a highly conductive tensile strain responsive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of reduced graphene oxide

[0030] Add the puffed expanded graphite and sodium nitrate in a mass ratio of 2:1 (1g of expanded graphite and 0.5g of sodium nitrate) into 110ml of sulfuric acid, and immediately transfer to an ice-water bath and stir for 0.5h after the addition. Then add 15g of potassium permanganate (the quality is according to (m (potassium permanganate): m (graphite) is 15:1), then add it in portions within 1h, with an interval of 3min each time, until the potassium permanganate is completely After the addition, react for 2 hours; start to heat up, and when the temperature rises to 35°C, stir for 0.5 hours, slowly drop 100ml of deionized water into the three-necked flask, and continue stirring for 0.5 hours after the addition; adjust the temperature to Stir at 98°C for 0.5h, oxidize under high temperature conditions, then add 400ml of preheated deionized water, then add 20ml of hydrogen peroxide, stir for a while, when the color gradually...

Embodiment 2

[0040] The difference between this embodiment and embodiment 1 is that spandex is used in step (2), and other processing means are consistent with embodiment 1. The electrical conductivity of the film material is 150 S / m, the elongation at break is 160%, and the resistance strain gage coefficient is 1.2.

Embodiment 3

[0042] The difference between this embodiment and embodiment 1 is that multi-walled carbon nanotubes are used in step (2), and other processing methods are consistent with embodiment 1. The electrical conductivity of the film material is 100 S / m, the elongation at break is 130%, and the resistance strain gage coefficient is 3.0.

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Abstract

The invention discloses a preparation method of a highly conductive tensile strain response material, which belongs to the technical field of semiconductor sensor materials. First prepare the carbon nanotube / graphene hybrid material, then uniformly disperse the carbon nanotube / graphene in the solution of the polymer material through a homogenizer and ultrasonic vibration, and finally prepare it by solution casting into a film or dip coating Carbon nanotubes@graphene / polymer nanocomposites, i.e. highly conductive tensile strain responsive materials. The material prepared by the invention has high conductivity, good flexibility and good strain responsiveness. The preparation method of the invention is simple, low in cost and strong in applicability, can be used in large-scale production, and can be widely used in industries such as smart skin and pressure-sensitive sensors.

Description

technical field [0001] The invention belongs to the technical field of semiconductor sensor materials, and in particular relates to a preparation method of a highly conductive tensile strain response material. Background technique [0002] Graphene is a two-dimensional nanomaterial composed of a single layer of carbon atoms, which has a large specific surface area, high electrical conductivity, and good mechanical properties and other functional properties. As a one-dimensional nanomaterial, carbon nanotubes have high aspect ratio, light weight, perfectly connected hexagonal structure, and many excellent mechanical, electrical, and chemical properties, and have a wide range of applications. [0003] The conductive composite material prepared by dispersing the conductive filler into the non-conductive polymer matrix will restructure the internal conductive path under the action of external force, and has certain force-sensitive properties. Due to its good flexibility and pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08K3/04C08J5/18
Inventor 王标兵沈业鹏罗钟琳
Owner CHANGZHOU UNIV
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