Intrinsic conductive elastomer, preparation method thereof and flexible device

An intrinsically conductive and elastomer technology, applied in the field of materials, can solve the problems of leakage, complex compound method of liquid conductive fillers, limited application scenarios, etc., and achieve the effects of high stretching, excellent stability and simple operation.

Pending Publication Date: 2021-08-06
THE CHINESE UNIV OF HONG KONG SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the solid conductive filler inevitably sacrifices the stretchability and transparency of the elastomer, while the compounding method of the liquid conductive filler is complicated, and there is leakage, which limits its application scenarios.

Method used

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  • Intrinsic conductive elastomer, preparation method thereof and flexible device
  • Intrinsic conductive elastomer, preparation method thereof and flexible device
  • Intrinsic conductive elastomer, preparation method thereof and flexible device

Examples

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preparation example Construction

[0051] A preparation method of the intrinsically conductive elastomer, comprising:

[0052] mixing raw materials including functional ionic liquid monomers, comonomers, crosslinking agents and initiators, and reacting to obtain the intrinsically conductive elastomer;

[0053] The functional ionic liquid monomers include ionic liquid monomers with a glass transition temperature less than or equal to 30°C and containing C=C double bonds and bistrifluoromethylsulfonimide groups, and the comonomers include acrylates One or more of monomers, acrylamide monomers, styrene monomers and vinyl monomers.

[0054] In some optional embodiments, the functional ionic liquid monomers include imidazole ionic liquid monomers, pyridine ionic liquid monomers, pyrrole ionic liquid monomers, piperidine ionic liquid monomers, quaternary ammonium salts One or more of ionic liquid monomers and quaternary phosphonium ionic liquid monomers;

[0055] In some optional embodiments, the imidazole ionic li...

Embodiment 1

[0083] 0.5g ionic liquid monomer 1-(6-(acryloyloxy)-hexyl)-3-methylimidazolium trifluoromethylsulfonimide salt ([EIC6A][TFSI]), 0.5g copolymerized monomer Bulk butyl acrylate (BA), 1.4 mg crosslinker poly(ethylene glycol) diacrylate (PEGDA, Mn=575) and 4.9 mg photoinitiator 1-hydroxy-cyclohexyl phenyl ketone (photoinitiator 184 ) to mix, fully stir evenly to form a precursor fluid. Put the homogeneously mixed precursor liquid into the vacuum box, the vacuum degree is 0.1bar, and degas for 30s. Inject the degassed precursor liquid into the assembled glass sheet-silica gel pad-glass sheet sandwich cavity (the glass sheet is coated with a release film), and put it into a vacuum cross-linking box. Put the mold that has been injected with the precursor fluid into the ultraviolet cross-connection box, and the power density is 50mW / cm 2 , cross-linked for 30min. After the reaction is over, the glass mold is disassembled, and the intrinsically conductive elastomer is taken out. Th...

Embodiment 2

[0087] 0.5 g of ionic liquid monomer N-vinylpyridine bistrifluoromethylsulfonimide salt (VPyTFSI), 0.5 g of comonomer butyl methacrylate (BMA), 1.4 mg of cross-linking agent ethylene glycol diacrylic acid Methyl ester (EGDMA) and 4.9mg photoinitiator 2, 4, 6 (trimethylbenzoyl) diphenyl phosphine oxide were mixed, and fully stirred evenly to form a precursor liquid. Put the homogeneously mixed precursor liquid into the vacuum box, the vacuum degree is 0.1bar, and degas for 30s. Inject the degassed precursor liquid into the assembled glass sheet-silica gel pad-glass sheet sandwich cavity (the glass sheet is coated with a release film), and put it into a vacuum cross-linking box. Put the mold that has been injected with the precursor fluid into the ultraviolet cross-connection box, and the power density is 50mW / cm 2 , cross-linked for 30min. After the reaction is over, the glass mold is disassembled, and the self-healing intrinsically conductive ion conductor is taken out. The...

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Abstract

The invention provides an intrinsic conductive elastomer, a preparation method thereof and a flexible device. The structural formula of the intrinsic conductive elastomer is shown in the specification, R1 comprises hydrogen or methyl, R2 comprises an ester group or phenylene, R3 is-(CH2) m-or-(CH2CH2O) n-, and m and n are respectively and independently positive integers from 1 to 8; and X< + > is an imidazole cation, a pyridine cation, a pyrrole cation, a piperidine cation, a quaternary ammonium cation or a quaternary phosphonium cation, and Y <-> is any one of a chloride ion, a bromide ion, a tetrafluoroboric acid ion, a hexafluorophosphate ion or a bis (trifluoromethylsulfonyl) imide anion. The preparation method of the intrinsic conductive elastomer comprises the following steps: mixing the raw materials including the functional ionic liquid monomer, the comonomer, the cross-linking agent and the initiator, and reacting to obtain the intrinsic conductive elastomer. The raw material of the flexible device comprises the intrinsic conductive elastomer. The intrinsic conductive elastomer has the characteristics of high tensile property, high transparency and excellent stability.

Description

technical field [0001] The present application relates to the field of materials, in particular to an intrinsically conductive elastomer, a preparation method thereof, and a flexible device. Background technique [0002] In the past decade, the rapid development of flexible and stretchable electronic devices has promoted extensive research on stretchable conductive materials. Among them, conductive elastomers have attracted extensive attention due to their excellent tensile properties, superior transparency, and all-solid properties. Conductive elastomers can be used to make flexible and stretchable devices (including sensors, actuators, and cables) and their components (such as electrodes, wires, etc.). [0003] At present, the preparation of conductive elastomers is mainly based on compounding conductive fillers into the elastomer matrix. The conductive fillers include solid conductive fillers (including metals, carbon, conductive polymers, etc.) and liquid conductive fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/34C08F222/20C08F226/06C08F222/14C08F218/08C08F222/38C08F212/36C08F216/12
CPCC08F220/1804C08F220/34C08F226/06C08F218/08C08F220/1808C08F222/1063C08F222/102C08F222/385C08F212/36C08F216/125
Inventor 朱世平明小庆张长庚张祺
Owner THE CHINESE UNIV OF HONG KONG SHENZHEN
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