Preparation method of field-induced nonlinear conducting composite material, composite material prepared and application thereof

A conductive composite material, nonlinear technology, applied in the direction of plastic/resin/wax insulators, organic insulators, etc., can solve the problems of difficult protection of instantaneous electromagnetic pulses, slow response time and conduction delay, etc., to achieve easy mass preparation, easy operation, The effect of high conductivity nonlinear coefficient

Active Publication Date: 2019-02-22
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] National University of Defense Technology Liu Peiguo and others proposed an energy selective surface structure (ESS), using PIN diodes to construct an energy selective surface and initially verified the effectiveness of the electromagnetic energy selective surface, but due to the slow response time and conduction delay of the diode material itself and other disadvantages, making it difficult to achieve effective protection against instantaneous electromagnetic pulses

Method used

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  • Preparation method of field-induced nonlinear conducting composite material, composite material prepared and application thereof
  • Preparation method of field-induced nonlinear conducting composite material, composite material prepared and application thereof
  • Preparation method of field-induced nonlinear conducting composite material, composite material prepared and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The method for preparing the modified graphene / epoxy resin field-induced nonlinear conductive composite material after reduction comprises the following steps:

[0044] (1) First, pour 50ml of deionized water, 150ml of ethanol and 10mg of KH560 into a beaker, and ultrasonically disperse for 1 hour until KH560 is completely hydrolyzed to obtain mixed solution A.

[0045] (2) Then add 100 mg GO into solution A, after ultrasonic dispersion, heat to 80 °C and stir for 4 h to obtain KGO suspension B.

[0046] (3) A small amount of KOH solution was added to the suspension B to make the system pH=10, and 147.06 mg of hydrazine hydrate was added to the suspension B, dispersed at room temperature, heated to 90°C with magnetic stirring for 6 hours to obtain RKGO suspension C.

[0047] (4) After the suspension C was washed with ethanol and deionized water and filtered three times, it was placed in a vacuum freeze dryer at -50°C for 24 hours to obtain a black RKGO powder.

[0048]...

Embodiment 2

[0051] The method for preparing the modified graphene / epoxy resin field-induced nonlinear conductive composite material after reduction comprises the following steps:

[0052] Front (1)-(4) are the same as embodiment 1.

[0053] (5) Take 100mg of RKGO, 100ml of acetone and 9.52g of epoxy resin E-51 into a beaker and seal the mouth of the beaker with plastic wrap, ultrasonically disperse for about 30min to obtain a suspension D, then heat to 80°C and stir for 4h, then remove the plastic wrap film, continue to heat and stir until the acetone evaporates completely, and a liquid composite material system is obtained.

[0054] (6) Cool the liquid composite material system prepared in step (5) to 45°C, pour 0.38g of 2E4MZ liquid into it, stir and react at 45°C for 1min, pour it into the mold that has been coated with release agent beforehand, and add it to the vulcanizer first. After standing at room temperature for 24 h under pressure, and then at 100 °C for 4 h, the mold was remo...

Embodiment 3

[0056] The reduced modified graphene / epoxy resin field-induced nonlinear conductive composite material preparation method comprises the following steps:

[0057] Front (1)-(4) are the same as embodiment 1.

[0058] (5) Pour 150mg of RKGO, 100ml of acetone and 9.47g of epoxy resin E-51 into a beaker and seal the mouth of the beaker with plastic wrap, disperse ultrasonically for about 30 minutes to obtain a suspension D, then heat to 80°C and stir for 4 hours, then remove the plastic wrap film, continue to heat and stir until the acetone evaporates completely, and a liquid composite material system is obtained.

[0059] (6) Cool the liquid composite material system prepared in step (5) to 45°C, pour 0.38g of 2E4MZ liquid into it, stir and react at 45°C for 1min, pour it into the mold that has been coated with release agent beforehand, and add it to the vulcanizer first. After standing at room temperature for 24 h under pressure, and then at 100 °C for 4 h, the mold was removed ...

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Abstract

The invention discloses a preparation method of a field-induced nonlinear conducting composite material, a prepared composite material and an application thereof and relates to the field of nonlinearconducting composite materials. The preparation method comprises the following steps: taking KH560, ethanol and deionized water to obtain a solution A; adding GO into the solution A to react for 3-5 hours at 75-85 DEG C to obtain a suspension B; adding alkali into the suspension B till the pH is 10, adding hydrazine hydrate to be dispersed, heating the mixture to 85-95 DEG C to react for 5-7 hoursto obtain a suspension C, washing, suction filtering and drying the filter cake to obtain RKGO powder; mixing the RKGO powder, epoxy resin E-51 and acetone to obtain a suspension D, carrying out a reaction at 75-85 DEG C till the acetone is volatilized fully and cooled to 45-50 DEG C, adding a 2-ethyl-4-methylimidazole liquid to react, and extracting bubbles to be cured to obtain a composite material, wherein the RKGO filling mass fraction in the composite material is 0.75-1.50%. The preparation method is simple, low in cost, short in reaction time and easy to prepare massively. The preparedcomposite material is light in weight, good in uniformity and high in conducting nonlinear coefficient, and can be used in the fields of overvoltage protection, lightning stroke and surge protection,static prevention and self-adaptive electromagnetic pulse protection.

Description

technical field [0001] The invention relates to the field of nonlinear conductive composite materials, in particular to a method for preparing a reduced modified graphene / epoxy resin field-induced nonlinear conductive composite material, the prepared composite material and its application. Background technique [0002] In recent years, large-scale integrated circuits have been widely used in military electronic information equipment, which has greatly improved the informatization and intelligence of electronic systems and equipment. At the same time, with the continuous development and application of electromagnetic pulse weapons (EMP) such as high-power microwaves, the electromagnetic environment in space is getting worse and worse, and the electromagnetic environment effects of electronic systems and equipment are becoming more and more significant. Therefore, doing a good job in electromagnetic protection is the key to ensuring the normal performance of electronic systems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/06C08K9/04C08K3/04H01B3/40
CPCC08K3/042C08K9/04C08K9/06C08K2201/001C08L2201/04C08L2203/20H01B3/40C08L63/00
Inventor 曲兆明袁扬王庆国
Owner ARMY ENG UNIV OF PLA
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