Preparation method of high-conductivity tensile strain response material

A tensile strain, high conductivity technology, applied in the field of preparation of high conductivity tensile strain responsive materials, can solve the problem of further improvement of sensitivity and stability, and achieve the effects of good axial conductivity, good flexibility and excellent performance

Active Publication Date: 2019-06-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 high-conductivity tensile strain response material
  • Preparation method of high-conductivity tensile strain response material
  • Preparation method of high-conductivity tensile strain response 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 high-conductivity tensile strain response material, and belongs to the technical field of semiconductor sensor materials. The preparation method comprises steps as follows: firstly, a CNT(carbon nano tube)/graphene hybrid material is prepared, then CNT/graphene is uniformly dispersed in a solution of a high polymer material by a homogenizer throughultrasonic oscillation, and finally, a CNT@graphene/polymeric nanocomposite, namely, the high-conductivity tensile strain response material, can be prepared with a solution pouring film formation ordip-coating method. The prepared material has high conductivity, better flexibility and good strain response capacity. The preparation method is simple, low in cost and high in applicability, can be applied to large-scale production and can be widely applied in industries such as smart skin, pressure-sensitive sensors and the like.

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 Applications(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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