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Segmented copolymer thermoplastic dielectric elastomer thin membrane and dielectric driver of thin membrane

A thermoplastic elastomer and block copolymer technology, which is applied in the field of block copolymer thermoplastic dielectric elastomer film and its dielectric driver, can solve problems such as difficult driving deformation, and achieve the effect of improving the breakdown field strength

Active Publication Date: 2019-09-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At the same time, the in-plane expansion generated by electric drive is usually a uniform expansion deformation, and it is difficult to achieve anisotropic drive deformation. The general method to achieve anisotropic drive is to use a fixed frame to maintain a dielectric elastomer with different pre-stretch ratios. Anisotropic actuation of the thin film; it is particularly important to truly realize the anisotropic actuation deformation of the self-supporting and frameless dielectric elastomer film, which has broad application prospects in the fields of anisotropic actuation and flexible robots

Method used

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  • Segmented copolymer thermoplastic dielectric elastomer thin membrane and dielectric driver of thin membrane
  • Segmented copolymer thermoplastic dielectric elastomer thin membrane and dielectric driver of thin membrane
  • Segmented copolymer thermoplastic dielectric elastomer thin membrane and dielectric driver of thin membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1: Equivalent 4-axis pre-stretching and heat-relaxed dielectric elastomer based on polystyrene-poly(n-butyl acrylate)-polystyrene (molecular weight: 1.5W-12W-1.5W) triblock thermoplastic elastomer film Evaluation of Electrical Breakdown Field Strength of Thin Films

[0023] The initial film (thickness is about 83 microns) of polystyrene-polyacrylate n-butyl acrylate-polystyrene triblock thermoplastic elastomer is respectively pre-stretched to twice the area of ​​the initial film (thickness is about 44 microns) Micron), 3 times (thickness is about 26 microns), about 7 times (thickness is about 12 microns); under fixed pre-stretching conditions, put it in 115 ° C for 10 hours and then cool at room temperature. The electrical breakdown field strength of the dielectric elastomer film was obtained by comparing the Weibull distribution before and after pre-stretching thermal relaxation. From figure 1 and figure 2 It can be seen that the greater the pre-stretching ...

Embodiment 2

[0025] Example 2: Equivalent 4-axis pre-stretching and heat-relaxed dielectric elastomer based on polystyrene-poly(n-butyl acrylate)-polystyrene (molecular weight: 1.5W-12W-1.5W) triblock thermoplastic elastomer film Thin Film Driving Performance Test

[0026] The initial films of polystyrene-poly(n-butyl acrylate)-polystyrene triblock thermoplastic elastomer (with thicknesses of 200 microns, 100 microns, 50 microns, 25 microns, and 12 microns) were pre-stretched separately by equal 4-axis To a dielectric elastomer film with a thickness of 12 microns; under a fixed pre-stretching condition, put it in 115 ° C for 10 hours and then cool it at room temperature. Then the same carbon nanotube flexible electrodes were coated on the upper and lower surfaces of the dielectric elastomer film for electrical driving test. Such as image 3As shown, the electrical breakdown voltage of the initial film with a thickness of 12 microns is about 450V, the breakdown field strength is about 42....

Embodiment 3

[0028] Example 3: Based on polystyrene-polyacrylate n-butyl acrylate-polystyrene (molecular weight: 1.5W-12W-1.5W) three-block thermoplastic elastomer film after different degrees of uniaxial pre-stretching and thermal relaxation Anisotropy drives performance

[0029] The initial film of polystyrene-polyacrylate n-butyl acrylate-polystyrene triblock thermoplastic elastomer is pre-stretched to 2 times and 4 times the length of the initial film respectively through uniaxial; Cool at room temperature after thermal relaxation at 110°C for 10 hours. Then the same carbon nanotube flexible electrodes were coated on the upper and lower surfaces of the dielectric elastomer film for electrical driving test. Such as Figure 4 As shown, self-supporting frameless electric actuation produces anisotropic deformation, and the initial film without pre-stretching treatment (such as Figure 4 As shown in (a), there is no obvious anisotropic deformation when the voltage is applied; the dielect...

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Abstract

The invention discloses a segmented copolymer thermoplastic dielectric elastomer thin membrane and a dielectric driver of the thin membrane. According to the segmented copolymer thermoplastic dielectric elastomer thin membrane and the dielectric driver of the thin membrane, the segmented copolymer thermoplastic dielectric elastomer thin membrane is subjected to a prestretching thermal relaxation technology, and a thinner self-supporting dielectric elastomer without fixing by a frame can be obtained; the driving performance of the dielectric elastomer is also improved, the driving voltage of the dielectric elastomer is lowered, the breakdown field strength of the dielectric elastomer is improved, and the area deformation of the dielectric elastomer is improved. In addition, through asymmetric prestretching thermal relaxation treatment, the dielectric elastomer with anisotropic mechanical properties can be obtained and can be used for drivers with anisotropic driving performance under frameless driving, and important significance is achieved on manufacturing of anisotropic flexible drivers and flexible robots by adopting the dielectric elastomer.

Description

technical field [0001] The invention relates to the field of thermoplastic dielectric elastomers, in particular to a block copolymer thermoplastic dielectric elastomer film and a dielectric driver thereof. Background technique [0002] The driving mechanism of the dielectric elastomer driver is to coat flexible electrodes on the upper and lower surfaces of the dielectric elastomer film and apply a certain voltage. Due to the different voltages of the upper and lower flexible electrodes, an electric field is formed, which produces Maxwell stress to squeeze the dielectric elastomer film, resulting in a decrease in the thickness of the dielectric elastomer film, expansion in the plane, and driving deformation. However, the driving voltage of the general dielectric elastomer driver is relatively high. Usually, the way to reduce the driving voltage is mainly to reduce the elastic modulus of the material, increase the dielectric constant of the material or reduce the thickness of ...

Claims

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Application Information

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IPC IPC(8): C08L53/00C08J5/18B29C55/10B29L7/00
CPCB29C55/10B29L2007/00C08J5/18C08J2353/00
Inventor 肖友华罗英武李铁风
Owner ZHEJIANG UNIV
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