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Composite wave absorption material and preparation method thereof

A technology of composite wave-absorbing materials and polymers, applied in the field of inorganic/organic composite wave-absorbing materials and their preparation, can solve the problems of easy aggregation of RGO and affecting performance, etc., and achieve the effects of low cost, good processing performance, and simple preparation

Inactive Publication Date: 2018-02-02
渭南高新区金石为开咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong van der Waals force between the sheets, RGO tends to aggregate, seriously affecting its performance.

Method used

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  • Composite wave absorption material and preparation method thereof
  • Composite wave absorption material and preparation method thereof
  • Composite wave absorption material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: prepare the composite material that the mass ratio of RGO / iron oxide core-shell nanoparticles is 1wt%, the specific steps are as follows:

[0018] (1): Preparation of RGO / iron oxide core-shell nanoparticles;

[0019] (2): Weigh 1% RGO / iron oxide core-shell nanoparticles and 99% polyvinylidene fluoride according to the mass ratio, add N,N dimethylformamide, and ultrasonically vibrate for 1h to make the RGO / iron oxide core Shell structure nanoparticles and polyvinylidene fluoride are mixed evenly;

[0020] (3): Put the mixture obtained above into a mold, press on a hot press at 180°C and 15MPa for 30 minutes, and then keep pressure and cool to prepare nanoparticles with a mass fraction of 1% RGO / iron oxide core-shell structure Filled polyvinylidene fluoride composite absorbing material.

Embodiment 2

[0021] Embodiment 2: prepare Fe 2 o 3 The composite material whose mass ratio of nanoparticles is 2%, the specific steps are as follows:

[0022] (1): Preparation of RGO / iron oxide core-shell nanoparticles;

[0023] (2): Weigh 2% RGO / iron oxide core-shell nanoparticles and 98% polyvinylidene fluoride according to the mass ratio, add N,N dimethylformamide, and ultrasonically vibrate for 1h to make the RGO / iron oxide core Shell structure nanoparticles and polyvinylidene fluoride are mixed evenly;

[0024] (3): Put the mixture obtained above into a mold, press on a hot press at 180°C and 15MPa for 30 minutes, and then keep pressure and cool to prepare nanoparticles with a mass fraction of 2% RGO / iron oxide core-shell structure Filled polyvinylidene fluoride composite absorbing material.

Embodiment 3

[0025] Embodiment 3: prepare the composite material that the mass ratio of RGO / iron oxide core-shell nanoparticles is 5%, the specific steps are as follows:

[0026] (1): Preparation of RGO / iron oxide core-shell nanoparticles;

[0027] (2): Weigh 5% RGO / iron oxide core-shell nanoparticles and 95% polyvinylidene fluoride according to the mass ratio, add N,N dimethylformamide, and ultrasonically vibrate for 1h to make the RGO / iron oxide core Shell structure nanoparticles and polyvinylidene fluoride are mixed evenly;

[0028] (3): Put the mixture obtained above into a mold, press on a hot press at 180°C and 15MPa for 30 minutes, and then keep pressure and cool to prepare nanoparticles with a mass fraction of 5% RGO / iron oxide core-shell structure Filled polyvinylidene fluoride composite absorbing material.

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Abstract

The invention discloses an RGO (Reduced Graphene Oxide) / ferric oxide filled polyvinylidene fluoride composite wave absorption material and a preparation method thereof. The composite wave absorption material comprises RGO / ferric oxide core-shell structure nanoparticles and polyvinylidene fluoride, wherein the mass ratio of RGO to ferric oxide in the RGO / ferric oxide core-shell structure nanoparticles is 20%:80%; the RGO / ferric oxide core-shell structure nanoparticles accounts for 1-20% of the composite wave absorption material, and the polyvinylidene fluoride accounts for 80-99% of the composite wave absorption material. As the polyvinylidene fluoride is filled with the RGO / ferric oxide core-shell structure nanoparticles, when the mass ratio of inorganic nanoparticles is 5% and the thickness of an inorganic / organic composite wave absorption material is 2mm, the maximum reflection loss is up to minus 39.43dB at the frequency of 14Hz, and the bandwidth is up to 6.0GHz (11.28-17.28GHz) when the reflection loss is less than minus 10dB.

Description

technical field [0001] The invention relates to an inorganic / organic composite wave-absorbing material and a preparation method thereof, in particular to an RGO / iron oxide-filled polyvinylidene fluoride composite wave-absorbing material and a preparation method thereof. technical background [0002] The research and application of radar absorbing materials (referred to as absorbing materials) is the key factor in the development of stealth technology. With the continuous development of radar detection technology, great challenges are posed to absorbing materials, and there is an urgent need for multifunctional absorbing materials with the advantages of "thin thickness, light weight, wide frequency band, and strong absorption". Traditional absorbing materials often have shortcomings such as narrow frequency band, high density, and large matching thickness, and it is difficult to meet the above comprehensive requirements. [0003] Graphene is a two-dimensional periodic honeyc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K3/22C08L27/16
CPCC08K9/10C08K3/22C08K2003/2265C08K2201/001C08K2201/011C08L27/16
Inventor 不公告发明人
Owner 渭南高新区金石为开咨询有限公司