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Elastic conductive organic-inorganic hybrid airgel and its preparation method and application

An elastic conductive, hybrid gas technology, applied in conductive, organic-inorganic hybrid stress-sensing airgel materials and its preparation, and elastic fields, can solve the problems that conductive gels cannot be applied to stress sensing, etc., and achieve low cost , strong controllability, simple and easy-to-obtain raw materials

Active Publication Date: 2018-09-11
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing conductive gels are basically unable to be applied to stress sensing, and the conductive gels that can realize temperature self-compensation for stress sensing are rarely reported.

Method used

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  • Elastic conductive organic-inorganic hybrid airgel and its preparation method and application
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  • Elastic conductive organic-inorganic hybrid airgel and its preparation method and application

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preparation example Construction

[0067] Still taking the preparation method of a kind of elastic, conductive, silver nanowire-polypyrrole hybrid airgel in the present invention as an example, refer to figure 1 , which may include the following steps:

[0068] a. Dissolving the intrinsically conductive polymer monomer in the mixed solvent dispersion formed by water and an organic solvent of the silver nanowire to form a polymer monomer solution;

[0069] Wherein, the organic solvent can be at least selected from ethanol, ethylene glycol, glycerol, acetone, methyl ethyl ketone, acetonitrile, tetrahydrofuran, N,N-dimethylformamide, N,N-dimethylacetamide Any of dimethyl sulfoxide, but not limited thereto. The volume ratio of water and organic solvent in the mixed solvent is preferably 1:10˜10:1.

[0070] b. dissolving the oxidizing agent in a mixed solvent composed of water and an organic solvent to form a homogeneous solution of the oxidizing agent;

[0071] Wherein, the oxidizing agent is preferably silver n...

Embodiment 1

[0088] Example 1 Please see again figure 1 , add 2.24mmol, 155μL of pyrrole (Pyrrole) monomer to 1.5mL silver nanowire / water-ethanol (v / v 1:5) mixed solution with a concentration of 9.43mg / mL, mix well and place in an ice-water bath 30min. Microscopic morphology of silver nanowires Figure 2a-Figure 2b . At the same time, 2.24mmol, 0.381g silver nitrate (AgNO 3 ) was dissolved in 1.5mL water-ethanol (v / v 1:5) mixed solution, mixed well and placed in an ice-water bath for 30min. Under strong magnetic stirring, the silver nitrate solution was added to the pyrrole monomer solution, stirred evenly, transferred to a gel mold, and left to stand in an ice-water bath for about 2 hours to form a gel. Transfer it to a constant temperature water bath at 35°C and let it stand for 2 days. The obtained gel was taken out from the reaction vessel, and deionized water was added to the wet gel, and after soaking for 3 hours, the deionized water was poured out. After repeating 8 times, the ...

Embodiment 2

[0089] Example 2 see again figure 1 , add 1.34mmol, 93.07μL of pyrrole (Pyrrole) monomer to 2mL water-ethylene glycol (v / v 3:1) mixed solution with a concentration of 220mg / mL silver nanowires, mix well and place at 35°C 10min in a constant temperature water bath. At the same time, 0.67mmol, 0.114g silver nitrate (AgNO 3) was dissolved in 1mL of water-ethylene glycol (v / v 3:1) mixed solution, mixed well and then placed in a constant temperature water bath at 35°C for 10min. Under strong magnetic stirring, the silver nitrate solution was added to the pyrrole monomer solution, stirred evenly, then transferred to a gel mold, and left to stand in an ice-water bath for about 2 days to form a gel. Transfer it to a constant temperature water bath at 65°C and let it stand for 1 day. The obtained gel was taken out from the reaction vessel, and deionized water was added to the wet gel, and after soaking for 5 hours, the deionized water was poured out. After repeating 6 times, the dia...

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Abstract

The invention discloses an elastic conductive organic-inorganic hybrid airgel, a preparation method and application thereof. The airgel comprises a continuous three-dimensional network structure, the continuous three-dimensional network structure is mainly formed by the interconnection of the core-shell basic skeleton composed of a primary network and a conformal covering layer, and the primary network is mainly composed of a suspension of low-dimensional inorganic nanoparticles The conformal covering layer is mainly formed by in-situ polymerization of intrinsically conductive polymers. The airgel has good structure and performance controllability, the maximum compression ratio can reach 95%, and it will return to its original shape within 10s to 5 minutes after compression. The electrical conductivity is 0.001 to 1000S / m, and the electrical conductivity increases with the compression It can be widely used in the fields of temperature self-compensating stress sensing, intelligent heaters, etc., and the airgel preparation process of the present invention is simple and easy to operate, has high controllability, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to an airgel material, in particular to an elastic, conductive, organic-inorganic hybrid stress-sensing airgel material and its preparation method and application. Background technique [0002] For stress sensing, the pressure-sensitive material as the core component is required to have good mechanical elasticity, electrical conductivity, stability and other comprehensive properties. Taking the piezoresistive pressure sensor as an example, its working principle is to reflect the external pressure signal on the resistance of the sensing material according to certain rules, and then convert it into a device that can be measured as an electrical signal. Because of its high sensitivity, fast dynamic response, easy miniaturization and miniaturization, convenient mass production and convenient use, it has become a type of sensor that develops extremely rapidly and is most widely used. However, the pressure-sensitive materials used as t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/04C08K7/00C08K3/08C08G73/06
Inventor 张学同何伟娜
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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