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High-electrodeformation dielectric elastomer composite and preparation method thereof

A dielectric elastomer and electro-induced deformation technology, applied in the field of dielectric elastomers, can solve the problems of reduced breakdown field strength of composite materials, the maximum electro-induced deformation is only 5.68%, and achieve the effect of suppressing the depletion effect

Inactive Publication Date: 2018-04-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application CN201410315875.0 "A Graphene-based Dielectric Elastomer Composite Material and Its Preparation Method" proposes an in-situ thermal reduction of graphene oxide-coated carbon nanosphere core-shell hybrid particles and rubber emulsion preparation Dielectric elastomer composite material, the composite material at frequency 10 3 The relative permittivity at Hz can be as high as 131, and the electric deformation can reach 3.06% when the electric field strength is as low as 2.0kV / mm, but the breakdown field strength of the composite material is greatly reduced, and the elastic modulus is greatly increased, making its maximum electric The deformation is very low, only 5.68%

Method used

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  • High-electrodeformation dielectric elastomer composite and preparation method thereof
  • High-electrodeformation dielectric elastomer composite and preparation method thereof
  • High-electrodeformation dielectric elastomer composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first step: adding 2.0 parts by mass of GO to 600 parts by mass of water, sonicating at 600W for 2 hours to obtain a uniformly dispersed GO aqueous dispersion;

[0033] Step 2: Mix 300 parts by mass of SBAS triblock copolymer latex with a molecular chain structure of 15k-170k-15k and a latex solid content of 33.6wt% with 600 parts by mass of the GO aqueous dispersion obtained in step (1) , Shake and stir for 12 hours to obtain the composite latex of the two;

[0034] The third step: Put the GO / SBAS composite latex in a polytetrafluoroethylene watch glass, evaporate the water at 25℃, and then place it in a 75℃ vacuum oven to dry and cool for 12 hours to obtain GO / SBAS Composite membrane

[0035] The fourth step: the GO / SBAS composite membrane is thermally reduced at 180°C for 4 hours to prepare the RGO / SBAS composite membrane.

Embodiment 2

[0037] The first step: adding 1.5 parts by mass of GO to 450 parts by mass of water, sonicating at 600W for 2 hours to obtain a uniformly dispersed aqueous GO dispersion;

[0038] Step 2: Mix 300 parts by mass of SBAS triblock copolymer latex with a molecular chain structure of 15k-170k-15k and a latex solid content of 33.6wt% with 450 parts by mass of the GO aqueous dispersion obtained in step (1) , Shake and stir for 12 hours to obtain the composite latex of the two;

[0039] The third step: Put the GO / SBAS composite latex in a polytetrafluoroethylene watch glass, evaporate the water at 25℃, and then place it in a 75℃ vacuum oven to dry and cool for 12 hours to obtain GO / SBAS Composite membrane

[0040] The fourth step: the GO / SBAS composite membrane is thermally reduced at 180°C for 4 hours to prepare the RGO / SBAS composite membrane.

Embodiment 3

[0042] Step 1: Add 1.0 parts by mass of GO to 300 parts by mass of water, and ultrasonically treat at 600W for 2 hours to obtain a uniformly dispersed GO aqueous dispersion;

[0043] Step 2: Mix 300 parts by mass of SBAS triblock copolymer latex with a molecular chain structure of 15k-170k-15k and a latex solid content of 33.6wt% with 300 parts by mass of the GO aqueous dispersion obtained in step (1) , Shake and stir for 12 hours to obtain the composite latex of the two;

[0044] The third step: Put the GO / SBAS composite latex in a polytetrafluoroethylene watch glass, evaporate the water at 25℃, and then place it in a 75℃ vacuum oven to dry and cool for 12 hours to obtain GO / SBAS Composite membrane

[0045] The fourth step: the GO / SBAS composite membrane is thermally reduced at 180°C for 4 hours to prepare the RGO / SBAS composite membrane.

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Abstract

The invention discloses a high-electrodeformation dielectric elastomer composite and a preparation method thereof. A polystyrene-b-poly(n-butyl acrylate)-polystyrene triblock copolymer is taken as a dielectric elastomer matrix, a method of direct emulsion blending of a graphene oxide water dispersion liquid and polystyrene-b-poly(n-butyl acrylate)-b-polystyrene emulsion is implemented, drying is performed at the room temperature, a dielectric elastomer composite film of graphene oxide / polystyrene-b-poly(n-butyl acrylate)-b-polystyrene is prepared, and a partially reduced graphene oxide / polystyrene-b-poly(n-butyl acrylate)-b-polystyrene dielectric elastomer composite is obtained through heat reduction. The adding amount of graphene and the elasticity modulus of the composite are effectivelyreduced, the dielectric property of the dielectric elastomer composite is improved, and the maximum electrodeformation of the partially reduced graphene oxide / polystyrene-b-poly(n-butyl acrylate)-b-polystyrene high-performance dielectric elastomer composite under the condition of no prestretching can be up to 21.3%.

Description

Technical field [0001] The invention relates to the field of dielectric elastomers, in particular to a high electro-induced deformation dielectric elastomer composite material and a preparation method thereof. Background technique [0002] Dielectric elastomer is a new type of smart material, which can produce reversible large deformation under the action of an external electric field, which can be used for the mutual conversion of electrical energy / mechanical energy. It has the characteristics of large drive deformation, high energy density, high electricity / machine conversion efficiency, fast response, low density and flexibility. It is expected to be applied to sensors, flexible drives, bionic flexible robots, next-generation smart medical devices, green energy harvesting, etc. The field has received widespread attention. [0003] The driving deformation of the dielectric elastomer is essentially caused by the Maxwell stress induced by an external electric field. A layer of fl...

Claims

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Application Information

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IPC IPC(8): C08L53/00C08K3/04C08J5/18
CPCC08J5/18C08J2353/00C08K3/04C08K2201/001
Inventor 张飞翔罗英武高翔
Owner ZHEJIANG UNIV
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