Unlock instant, AI-driven research and patent intelligence for your innovation.

Carbon-plastic composite wave-absorbing material and preparation method thereof

A composite wave-absorbing material and carbon-plastic technology, applied in chemical instruments and methods, and other chemical processes, can solve problems such as poor practicability and narrow effective wave-absorbing frequency band, and achieve low production cost, good wave-absorbing performance, Effects from a wide range of sources

Active Publication Date: 2022-04-12
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, especially for technical problems such as the narrow effective absorbing frequency band and poor practicability of biomass carbon materials existing in the prior art, and to provide an effective absorbing frequency band A wider and more practical carbon-plastic composite wave-absorbing material, and a method for preparing a carbon-plastic composite wave-absorbing material that is simple to prepare, low in cost, and environmentally friendly

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Carbon-plastic composite wave-absorbing material and preparation method thereof
  • Carbon-plastic composite wave-absorbing material and preparation method thereof
  • Carbon-plastic composite wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A carbon-plastic composite wave-absorbing material of the present invention, such as figure 1 As shown, it includes a charcoal sheet layer and a resin coating layer covering the charcoal sheet layer. The charcoal sheet layer contains a plurality of charcoal sheet units 1. The charcoal sheet unit 1 is mainly made of wood chip units through carbonization. The carbonization temperature is 650 ° C. The time is 3h.

[0048] In the present embodiment, there are specifically 16 charcoal sheet units 1, such as figure 2 As shown, 16 charcoal sheet units 1 are distributed in an array, that is, a matrix distribution, the spacing h between adjacent charcoal sheet units 1 is 5mm, and the three-dimensional size of each charcoal sheet unit 1 is 40mm (length) × 40mm (width)×2.5mm (thickness).

[0049] In this embodiment, the resin covering layer is made of resin material, and the resin material is epoxy resin. The resin coating layer is a hollow cubic structure with a layer thickne...

Embodiment 2

[0056] A carbon-plastic composite wave-absorbing material of the present invention and its preparation method are basically the same as in Example 1, the only difference being that the thickness of the charcoal sheet unit 1 is 3mm, and the thickness of the carbon-plastic composite wave-absorbing material is 5mm.

[0057] The microwave-absorbing properties of the carbon-plastic composite wave-absorbing material obtained in this embodiment are as follows: Figure 4 As shown, the effective absorbing frequency band reaches 8.67GHz (11.33GHz~20.00GHz), and the peak reflection loss reaches -14.92dB.

Embodiment 3

[0059] A carbon-plastic composite wave-absorbing material of the present invention is basically the same as that of Example 1, except that the carbonization temperature is 670°C.

[0060] A method for preparing the carbon-plastic composite wave-absorbing material of this embodiment is basically the same as that of Embodiment 1, the only difference being that the three-dimensional dimensions of each wood chip unit are 58mm (length) × 58mm (width) × 8mm (thickness) , the carbonization temperature is 670°C.

[0061] The microwave-absorbing properties of the carbon-plastic composite wave-absorbing material obtained in this embodiment are as follows: Figure 5 As shown, the effective absorbing frequency band reaches 3.49GHz (9.65GHz~13.59GHz), and the peak reflection loss reaches -40.21dB.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a carbon-plastic composite wave-absorbing material and a preparation method thereof. The carbon-plastic composite wave-absorbing material includes a charcoal sheet layer and a resin coating layer covering the charcoal sheet layer. The charcoal sheet layer contains a plurality of charcoal sheet units. The charcoal chip unit is mainly made by carbonizing the wood chip unit, the carbonization temperature is 600°C-800°C, and the carbonization time is 0.5h-5h. The preparation method includes wood chip unit preparation, charcoal chip unit preparation, charcoal sheet layer preparation and carbon-plastic composite wave-absorbing material casting. The carbon-plastic composite wave-absorbing material has strong electromagnetic wave absorption capacity, wide effective wave-absorbing frequency band, strong reflection loss, simple preparation process, low cost and wide application.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave absorbing materials, and relates to a carbon-plastic composite wave-absorbing material and a preparation method thereof, in particular to a carbon-plastic composite wave-absorbing material with a coated matrix structure and a preparation method thereof. Background technique [0002] The absorbing material is a kind of special material that can allow electromagnetic waves to enter its interior and convert the energy of electromagnetic waves into other forms of energy through dielectric loss, thereby achieving the purpose of attenuating electromagnetic waves. Good absorbing materials need to meet impedance matching and attenuation matching respectively. Impedance matching means that when the electromagnetic wave radiates to the surface of the material, it can enter the interior of the material as much as possible, and attenuation matching means that the electromagnetic wave can be atten...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K3/04C09K3/00
CPCC08K3/04C09K3/00C08L63/00
Inventor 全鹏刘元李贤军周军龙纯曹敏罗勇锋杨喜
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY