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Montmorillonite ceramic filler composite modified dielectric elastomer as well as preparation method and application thereof

A technology of dielectric elastomers and ceramic fillers, applied in the field of dielectric materials, can solve the problems of large dielectric loss, low dielectric constant, high breakdown strength, etc., and achieve improved dielectric properties, high energy density, excellent dielectric The effect of electrical properties

Pending Publication Date: 2022-04-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] Aiming at the problems of low dielectric constant, large dielectric loss and low breakdown strength of dielectric elastomers in the prior art, the present invention has found through research that the dispersion state of modified montmorillonite affects the dielectric properties of composite elastomers, and is related to The synergy between the dielectric fillers can improve the dispersion of the dielectric fillers, improve the dielectric properties, and finally make the dielectric elastomer have high dielectric constant, low dielectric loss and high breakdown strength, thereby overcoming the existing technical problems

Method used

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  • Montmorillonite ceramic filler composite modified dielectric elastomer as well as preparation method and application thereof
  • Montmorillonite ceramic filler composite modified dielectric elastomer as well as preparation method and application thereof
  • Montmorillonite ceramic filler composite modified dielectric elastomer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Add 20 g of sodium montmorillonite, 10 g of octadecyldimethylbenzyl ammonium chloride (ODAB), and 200 mL of deionized water into a beaker, and stir mechanically at 600 rpm for 2.5 hours to make the montmorillonite Disperses well in solution. After the reaction, the mixed solution was dried in an oven at 100° C. for 24 hours to remove excess deionized water to obtain a modified montmorillonite.

[0056] (2) The modified montmorillonite obtained in (1) is mixed according to the formula (100 parts of silicone rubber, 1 part of double 2,5 vulcanizing agent, 10 parts of modified montmorillonite, 10 parts of barium titanate (BT)) Refined to obtain rubber mix. Put the mixed rubber into a high-temperature vulcanizer and vulcanize at 160°C to finally obtain a dielectric elastomer, which is designated as rubber 1. The resulting dielectric elastomer material was tested.

Embodiment 2

[0058] (1) Add 20 g of sodium montmorillonite, 10 g of octadecyldimethylbenzyl ammonium chloride (ODAB), and 200 mL of deionized water into a beaker, and stir mechanically at 600 rpm for 2.5 hours to make the montmorillonite Disperses well in solution. After the reaction, the mixed solution was dried in an oven at 100° C. for 24 hours to remove excess deionized water to obtain a modified montmorillonite.

[0059] (2) The modified montmorillonite obtained in (1) is mixed according to the formula (100 parts of silicone rubber, 1 part of double 2,5 vulcanizing agent, 10 parts of modified montmorillonite, 20 parts of barium titanate (BT)) Refined to obtain rubber mix. Put the mixed rubber into a high-temperature vulcanizer and vulcanize at 160°C to finally obtain a dielectric elastomer, which is designated as rubber 2. The resulting dielectric elastomer material was tested.

Embodiment 3

[0061] (1) Add 20 g of sodium montmorillonite, 10 g of octadecyldimethylbenzyl ammonium chloride (ODAB), and 200 mL of deionized water into a beaker, and stir mechanically at 600 rpm for 2.5 hours to make the montmorillonite Disperses well in solution. After the reaction, the mixed solution was dried in an oven at 100° C. for 24 hours to remove excess deionized water to obtain a modified montmorillonite.

[0062] (2) The modified montmorillonite obtained in (1) is mixed according to the formula (100 parts of silicone rubber, 1 part of double 2,5 vulcanizing agent, 10 parts of modified montmorillonite, 30 parts of barium titanate (BT)) Refined to obtain rubber mix. Put the mixed rubber into a high-temperature vulcanizer and vulcanize at 160°C to finally obtain a dielectric elastomer, which is designated as rubber 3. The resulting dielectric elastomer material was tested.

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Abstract

The invention relates to a montmorillonite and ceramic filler compounded dielectric elastomer. The dielectric elastomer comprises a rubber matrix, montmorillonite and a ceramic filler, wherein the montmorillonoid is modified montmorillonoid; the ratio of the total weight of the montmorillonite and the ceramic filler to the weight of the rubber is (0.05-0.9): 1, preferably (0.1-0.7): 1; the weight ratio of the modified montmorillonite to the ceramic filler is (0.1-5): 1, preferably (0.2-3): 1. By utilizing the synergistic effect of the fillers, the dispersion of the fillers in the rubber is improved, and the dielectric elastomer with excellent dielectric property is prepared and is applied to an energy converter. The invention has the advantages of large deformation, high energy density, fast response, long service life and the like.

Description

technical field [0001] The invention relates to the field of dielectric materials, in particular to a dielectric elastomer compound-modified by montmorillonite ceramic fillers and a preparation method and application thereof. Background technique [0002] Dielectric elastomers are used as energy converters in both driving and generating modes. The driving mode is to convert electrical energy into mechanical energy. Under the action of an external electric field, the electrodes on both sides generate opposite charges and attract each other; one side generates the same charge and repel each other; finally, they compress in the thickness direction and expand in the plane direction to realize the conversion of electrical energy and mechanical energy. Contrary to the drive mode, the power generation mode converts mechanical energy into electrical energy based on the difference in capacitance before and after stretching. [0003] In order to quantify the influencing factors, in ...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K3/34C08K3/24C08L83/04C08L75/04C08L7/00C08L33/04C08K3/22C08K9/06
Inventor 刘玲院津铭高瑞英张立群
Owner BEIJING UNIV OF CHEM TECH