Fluorinated silicone rubber dielectric elastomer composite material and preparation method thereof

A technology of dielectric elastomer and fluorosilicone rubber is applied in the field of fluorosilicone rubber dielectric elastomer composite material and its preparation, which can solve the problems of increasing Young's modulus, increasing material defects, increasing material brittleness and the like, and achieves electric shock. The effect of increased penetration strength, large electro-deformation, and increased dielectric constant

Inactive Publication Date: 2015-08-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, a large number of fillers will inevitably lead to an increase in material defects, resulting in a decrease in the breakdown strength of the material, which is not conducive to obtaining large electrical deformation.
At the same time, it is difficult to ensure the reliability of dielectric elastomer materials, which is not conducive to the actual use of dielectric elastomers
[0005] Chinese patent application "a nano-Fe with high dielectric constant 2 o 3 Doped polyvinylidene fluoride composite material" (Patent Application No. 201410123589.4) proposes the Fe 2 o 3 Mixed with polyvinylidene fluoride, the dielectric constant of the obtained composite material reaches 210, but due to the large modulus of polyvinylidene fluoride itself, a large amount of Fe 2 o 3 The addition of , greatly increases the modulus of the composite material, making it require a very high voltage to produce deformation
However, a large amount of filling is required, resulting in an increase in material defects, a large change in breakdown voltage, and it is difficult to ensure large electrical deformation.
In addition, the electro-induced deformation obtained by this method is improved compared with other dielectric elastomers, but there are still problems such as increased brittleness of the material, poor mechanical properties, and a significant increase in Young's modulus.

Method used

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  • Fluorinated silicone rubber dielectric elastomer composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Using poly(3,3,3-trifluoropropylmethyl) silicone rubber as a matrix, and using titanium dioxide as a filler, (1) 100 parts by mass of fluorosilicone rubber is masticated at room temperature on an open mill, and then Gradually add 0.2 parts by mass of bis-2,5 (2,5-dimethyl-2,5-di-tert-butylperoxyhexane), knead with a knife, make a triangle bag, make it evenly mixed, and then gradually add 5 parts by mass of rutile titanium dioxide with a particle diameter of 30nm, kneaded uniformly, and released into sheets. (2) After mixing and parking for 7 hours, carry out a stage of vulcanization: set the pressure at 10 MPa and the temperature at 170° C. for 10 minutes on a 25-ton electric heating plate vulcanizer produced by Shanghai Rubber Machinery Manufacturing. (3) After one-stage vulcanization, place it in a blast oven at 200°C for 4 hours for two-stage vulcanization. A cross-linked fluorosilicone rubber / titanium dioxide dielectric elastomer is obtained. (4) Take a...

Embodiment 2

[0025] Embodiment 2: The preparation method is the same as that of Embodiment 1, except that the parts of titanium dioxide are 10 parts by mass. The test results are shown in Table 1.

Embodiment 3

[0026] Example 3: Using poly(3,3,3-trifluoropropylmethyl) silicone rubber as a matrix, using titanium dioxide as a filler, (1) masticating 100 parts by mass of fluorosilicone rubber at room temperature on an open mill, and then Gradually add 0.5 parts by mass of DCP, knead with a knife, pack into triangles to make it evenly mixed, then gradually add 10 parts by mass of rutile titanium dioxide with a particle size of 30 nm, mix evenly, and produce tablets. (2) After mixing and parking for 7 hours, carry out a stage of vulcanization: set the pressure on a 25-ton electric heating plate vulcanizer manufactured by Shanghai Rubber Machinery to 15 MPa. The temperature is 160°C for 20 minutes of vulcanization. (3) After one-stage vulcanization, place it in a blast oven at 180°C for 5 hours for two-stage vulcanization. A cross-linked fluorosilicone rubber / titanium dioxide dielectric elastomer is obtained. (4) Take a dielectric elastomer electrode test piece with a thickness of 1 mm a...

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Abstract

The invention relates to a fluorinated silicone rubber dielectric elastomer composite material and a preparation method thereof. The cross-linking density is changed, the amount of a high-dielectric semiconductor filler is regulated and controlled, and thus the composite material with good dispersion is obtained. The obtained composite material can obtain high dielectric constant with relatively low filling of the semiconductor filler, at the same time, the elastic modulus has no obvious improvement, the electric breakdown strength remains unchanged, and eventually relatively large electrodeformation is produced.

Description

Technical field: [0001] The invention relates to a fluorosilicone rubber dielectric elastomer composite material and a preparation method thereof. In particular, a dielectric elastomer material with high dielectric constant, low modulus and large electro-induced deformation is obtained by filling fluorosilicone rubber with high dielectric filler and a preparation method thereof. Background technique: [0002] Dielectric Elastomer (DE) is an electroactive polymer. Dielectric elastomer actuators consist of a polymer film sandwiched between two compliant electrodes: applying a voltage difference between the two electrodes causes the polymer film to shrink in thickness and expand in area, converting electrical energy into mechanical energy. Because of its good deformation repeatability, fast strain response time, small driving voltage, temperature stability and time stability, etc., it has a wide range of applications in the fields of optics, space detection, miniaturization te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/08C08K5/14C08K3/22B29C35/02
Inventor 张立群戈风行武文杰田明宁南英
Owner BEIJING UNIV OF CHEM TECH
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