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Graphene elastomer nano composite material with high dielectric constant and low dielectric loss and preparation method thereof

A nanocomposite material and graphene technology, which is applied in the field of graphene elastomer nanocomposite materials and its preparation, can solve the problems of high filling amount and performance degradation of composite materials, and achieve the effect of improving dielectric properties

Active Publication Date: 2013-07-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of the performance degradation of composite materials caused by the high filling amount required when filling rubber with inorganic conductors and the simultaneous increase of dielectric constant and dielectric loss

Method used

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  • Graphene elastomer nano composite material with high dielectric constant and low dielectric loss and preparation method thereof
  • Graphene elastomer nano composite material with high dielectric constant and low dielectric loss and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Dissolve 8 mg of graphite oxide synthesized by the Hummers method in 40 ml of deionized water, and disperse with 300 W ultrasonic for 1 hour. The graphite oxide is stripped into graphene oxide, and a stable suspended graphene oxide aqueous solution is obtained;

[0024] (2) the graphene oxide aqueous solution prepared by step (1) and 10g of nitrile rubber emulsion (the brand produced by Zeom company is the nitrile rubber emulsion of Nipol1571H, wherein the solid content of nitrile rubber is 40wt%, in nitrile rubber The monomer acrylonitrile content is 37wt%) and mix evenly, then add 0.02g of dicumyl peroxide and 0.02g of triallyl isocyanurate to dissolve and disperse completely;

[0025] (3) Use a vacuum rotary evaporator to evaporate most of the water from the mixed emulsion obtained in step (2) at 45°C, then dry and dehydrate at 45°C, and obtain a preformed composite membrane after all the water is evaporated;

[0026] (4) The obtained preformed composite membrane...

Embodiment 2

[0030] The preparation method is the same as that in Example 1, except that the amount of graphite oxide used in step (1) is 20 mg dispersed in 100 ml of water. The test results are shown in Table 1.

[0031] Obtaining the graphene elastomer nanocomposite composition is the nitrile rubber of 4g, the graphene of 20mg; Particle network structure.

Embodiment 3

[0033] The preparation method is the same as that in Example 1, except that the amount of graphite oxide used in step (1) is 40 mg dispersed in 200 ml of water. The test results are shown in Table 1.

[0034] Obtaining the graphene elastomer nanocomposite composition is the nitrile rubber of 4g, the graphene of 40mg; The structure of this composite material is that the graphene sheet is dispersed in the nitrile rubber at the nanometer level, and forms the graphene sheet to wrap the latex particle network structure.

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Abstract

The invention discloses a graphene elastomer nano composite material with low filling quantity and a preparation method thereof, which belong to the technical field of preparation of dielectric elastomer. The preparation method comprises the following steps of: adding an aqueous solution of graphene oxide into water-soluble rubber latex so that the graphene oxide is dispersed in rubber matrix on molecular level, reducing the graphene oxide into graphene by adopting an in-situ hot-pressing reduction method, and thus forming a network structure that graphene flake layers wrap latex particles. The obtained composite material has high dielectric constant under low filling quantity, keeps low dielectric loss, and has low percolation value. The composite material solves the problem that the performance of the composite material is reduced because the filling quantity required when an inorganic conductor is filled with rubber and the dielectric constant and the dielectric loss are simultaneously improved.

Description

technical field [0001] The invention belongs to the technical field of dielectric elastomer preparation, and in particular relates to a graphene elastomer nanocomposite material with low filling amount and a preparation method thereof. The elastomer nanocomposite material has high dielectric constant and low dielectric loss. Background technique [0002] Dielectric elastomers have excellent comprehensive properties, such as large electro-induced deformation, short response time, small viscoelastic hysteresis loss, good flexibility and high conversion rate. Coating flexible electrodes on both sides of a dielectric elastomer film can form a dielectric elastomer driver, which has broad application prospects in the fields of pocket or micro robots, micro aircraft, disk drives, planar loudspeakers and prosthetic organs. [0003] Elastomer has excellent mechanical deformation ability, that is, large deformation can be produced under small stress, and it also has unique high elasti...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L9/06C08L9/02C08L15/00C08L13/00C08K3/04C08K5/14C08K5/3492C08J3/24
Inventor 田明昝晓庆宁南英张立群冯予星
Owner BEIJING UNIV OF CHEM TECH
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