High-elongation imidazolium salt doped conductive elastomer and preparation method thereof

A technique of molarizing imidazoles and elastomers, which is applied in the field of conductive elastomers. It can solve the problems of material conductivity decline, conductive fillers are easy to agglomerate, and the preparation process is complicated. It achieves the effects of good conductivity, large optimization space, and high cost.

Active Publication Date: 2020-10-27
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to avoid the deficiencies of the prior art, the present invention proposes a conductive elastomer doped with high elongation imidazolium salt and its preparation method, which overcomes the complex and costly preparation process of traditional flexible conductive materials, the easy agglomeration of conductive fillers and the large deformation conditions However, due to the shortcoming that the electrical conductivity of the material drops sharply, the present invention is inspired by the deep eutectic solvent, through a simple method of doping the hydrogen bond acceptor imidazolium salt into the hydrogen bond donor carboxyl-containing polyacrylate, and prepares a polyacrylate with high elongation Conductive elastomers with advantages such as high efficiency and good conductivity

Method used

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  • High-elongation imidazolium salt doped conductive elastomer and preparation method thereof
  • High-elongation imidazolium salt doped conductive elastomer and preparation method thereof
  • High-elongation imidazolium salt doped conductive elastomer and preparation method thereof

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Embodiment 1

[0029] Embodiment 1: the preparation of the conductive elastomer of imidazolium salt doping

[0030] Add 0.60 g of [HOEtMIm]Cl and 4.0 g of carboxyl-containing polyacrylate elastomer to 15 mL of ethanol and 5 mL of tetrahydrofuran mixed solvent, obtain a homogeneous solution after stirring and transfer the solution to a 60 mm inner diameter tetrafluoroethylene petri dish Set aside to evaporate the solvent. Subsequently, the initially obtained composite film doped with imidazolium salt was further dried in a blast oven at 90°C for 3 hours to obtain a conductive elastomer film material, which was stored in a desiccator equipped with silica gel for future use.

Embodiment 2

[0031] Embodiment 2: Preparation of the conductive elastomer doped with imidazolium salt

[0032] Add 1.0 g of [HOEtMIm]Cl and 4.0 g of carboxyl-containing polyacrylate elastomer to 15 mL of ethanol and 5 mL of tetrahydrofuran mixed solvent, obtain a homogeneous solution after stirring, and transfer the solution to a 60 mm tetrafluoroethylene Petri dish. Set aside to evaporate the solvent. Subsequently, the initially obtained composite film doped with imidazolium salt was further dried in a blast oven at 90°C for 3 hours to obtain a conductive elastomer film material, which was stored in a desiccator equipped with silica gel for future use.

Embodiment 3

[0033] Embodiment 3: the preparation of the conductive elastomer of imidazolium salt doping

[0034] Add 1.4 g of [HOEtMIm]Cl and 4.0 g of carboxyl-containing polyacrylate elastomer to 15 mL of ethanol and 5 mL of tetrahydrofuran mixed solvent, obtain a homogeneous solution after stirring, and transfer the solution to a 60 mm tetrafluoroethylene Petri dish. Set aside to evaporate the solvent. Subsequently, the initially obtained composite film doped with imidazolium salt was further dried in a blast oven at 90°C for 3 hours to obtain a conductive elastomer film material, which was stored in a desiccator equipped with silica gel for future use.

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Abstract

The invention relates to a high-elongation imidazolium salt doped conductive elastomer and a preparation method thereof. The defects that a traditional flexible conductive material is complex in preparation process and high in cost, the conductive filler is prone to agglomeration, and the conductivity of the material is sharply reduced under the large deformation condition are overcome. Specifically, the invention relates to a process for preparing a conductive elastomer by doping imidazolium salt (hydrogen bond acceptor) into carboxyl-containing polyacrylate (hydrogen bond donor), and the obtained elastomer has the advantages of high elongation, good conductivity, thermal stability, high voltage stability and the like. By changing the carboxyl content and the imidazolium salt doping amount of the polymer matrix, the mechanical property and the conductivity of the polymer matrix can be regulated and controlled. According to the invention, a conductive elastomer system is enriched, anda new idea is provided for preparation of more ionic conductive elastomer materials with high elongation and good conductivity.

Description

technical field [0001] The invention belongs to the field of conductive elastomers, and relates to a high-elongation imidazolium salt-doped conductive elastomer and a preparation method, in particular to the use of imidazolium salts as hydrogen bond acceptors and carboxyl-containing polyacrylates as hydrogen bond donors. The imidazolium salt is doped into the carboxyl-containing polyacrylate, and the conductive elastomer with adjustable mechanical properties and conductive properties can be obtained by adjusting the doping amount of the imidazolium salt and the carboxyl content of the polymer. Background technique [0002] In recent years, the rise and development of flexible electronics, including flexible displays, sensors, artificial skin, and wearable devices, has attracted much attention. Among them, flexible conductive materials play a pivotal role in optimizing the performance of flexible electronic devices. At present, there are two main methods for preparing flexib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/04C08K5/3445C08J5/18
CPCC08J5/18C08J2333/04C08K5/3445C08K2201/001
Inventor 张秋禹王文艳何小伟刘宗旭薛颖
Owner NORTHWESTERN POLYTECHNICAL UNIV
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