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A carbon-based dielectric elastomer based on core-shell dynamic vulcanization and its preparation method

A dielectric elastomer and dynamic vulcanization technology, which is applied in the fields of carbon-based conductive filler/thermoplastic elastomer composites, carbon-based dielectric elastomers and their preparation, can solve the problems of high dielectric loss and no effective solution, etc. Achieving a high degree of practicality

Active Publication Date: 2020-04-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of high dielectric loss has not been effectively solved

Method used

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  • A carbon-based dielectric elastomer based on core-shell dynamic vulcanization and its preparation method
  • A carbon-based dielectric elastomer based on core-shell dynamic vulcanization and its preparation method
  • A carbon-based dielectric elastomer based on core-shell dynamic vulcanization and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Polyvinylidene fluoride was selected as the matrix resin (502, Guangzhou Lichang), silicone rubber was used as general foundation silicone rubber (KE571-U, Japan Shin-Etsu), and fluororubber (F2463, Zhonghao Chenguang Chemical Research Institute). Graphene oxide (0.25g) was ultrasonically dispersed in THF for 2h to obtain a graphene oxide suspension;

[0076] Dissolve silicone rubber (15g) in graphene oxide suspension, and disperse evenly by ultrasonication for 2h; evaporate the solvent to dryness at 80°C, and reduce graphene oxide to graphene at 400°C to obtain a graphene / silicone rubber blend thing;

[0077] On an open mill, fluorine rubber (15g), magnesium oxide (0.75g), calcium hydroxide (0.75g) were mixed for 6 minutes to obtain a uniformly mixed fluorine rubber compound;

[0078] Add polyvinylidene fluoride (20g) to a Haake torque rheometer with a temperature of 180°C and a rotor speed of 90r / min to completely melt and plasticize the fluoroplastic; add graphene / s...

Embodiment 2

[0081] Polyvinylidene fluoride was selected as the matrix resin (502, Guangzhou Lichang), silicone rubber was used as general foundation silicone rubber (KE571-U, Japan Shin-Etsu), and fluororubber (F2463, Zhonghao Chenguang Chemical Research Institute).

[0082] Graphene oxide (0.5g) was ultrasonically dispersed in tetrahydrofuran for 2h to obtain a graphene oxide suspension; silicon rubber (15g) was dissolved in the graphene oxide suspension, and ultrasonically dispersed for 2h; the solvent was evaporated to dryness at 100°C, Reducing graphene oxide to graphene at 300°C to prepare a graphene / silicone rubber blend;

[0083] On an open mill, mix fluororubber (15g), magnesium oxide (0.75g), and calcium hydroxide (0.75g) for 6 minutes to obtain a uniformly mixed fluororubber compound; polyvinylidene fluoride (20g ) into the Haake torque rheometer with a temperature of 180°C and a rotor speed of 100r / min to completely melt and plasticize the fluoroplastic; add graphene / silicone r...

Embodiment 3

[0086] Polyvinylidene fluoride was selected as the matrix resin (502, Guangzhou Lichang), silicone rubber was used as general foundation silicone rubber (KE571-U, Japan Shin-Etsu), and fluororubber (F2463, Zhonghao Chenguang Chemical Research Institute).

[0087] Graphene oxide (0.75g) was ultrasonically dispersed in tetrahydrofuran for 2h to obtain a graphene oxide suspension; silicon rubber (15g) was dissolved in the graphene oxide suspension, and ultrasonically dispersed for 2h; the solvent was evaporated to dryness at 60°C, Reducing graphene oxide to graphene at 150°C to prepare a graphene / silicone rubber blend;

[0088] On an open mill, mix fluororubber (15g), magnesium oxide (0.75g), and calcium hydroxide (0.75g) for 6 minutes to obtain a uniformly mixed fluororubber compound; polyvinylidene fluoride (20g ) into the Haake torque rheometer with a temperature of 180°C and a rotor speed of 110r / min to completely melt and plasticize the fluoroplastic; add graphene / silicone r...

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Abstract

The invention discloses a carbon-based dielectric elastomer based on core-shell dynamic vulcanization and a preparation method. Multiple core-shell structures of core rubber completely coated and crosslinked by shell rubber are formed in a plastic continuous phase through dispersion; carbon-based conductive filler in the dielectric elastomer is selectively dispersed in the core rubber and coated with the shell rubber to form dispersed micron-size micro-capacitors; the dielectric constant of the carbon-based dielectric elastomer within the frequency range of 101-106 Hz is kept at 55 or above and dielectric loss can be kept at 0.1 or below. The dielectric constant of the dielectric elastomer is increased significantly while the low dielectric loss is kept in the wideband range, and the prepared dielectric elastomer can be widely applied to medical equipment, energy storage, biomimetic materials, aviation machinery, robots and other fields.

Description

technical field [0001] The invention relates to a thermoplastic elastomer material, in particular to a carbon-based dielectric elastomer based on core-shell dynamic vulcanization and a preparation method thereof. The carbon-based dielectric elastomer is a carbon-based conductive filler / thermoplastic elastic material with a core-shell structure body composites. Background technique [0002] Dielectric elastomers are electronically active polymers that convert electrical energy into mechanical energy under the Maxwell effect. Dielectric elastomers have the advantages of light weight, large electro-induced deformation, high mass-energy density, and high conversion efficiency. Due to the above-mentioned advantages of dielectric elastomers, it is widely used in medical equipment, energy storage, bionic materials, aviation machinery, robots and other fields. [0003] Polymers have the advantages of good flexibility, easy molding and processing. However, the dielectric constant ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08L83/04C08L27/12C08L23/12C08L23/16C08L51/06C08L51/04C08K13/02C08K3/04C08K3/22C08K5/14C08J3/24
Inventor 陈玉坤龚舟
Owner SOUTH CHINA UNIV OF TECH
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