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Wave-absorbing material and preparation method thereof

A wave-absorbing material and raw material technology, applied in the field of electronic materials, can solve problems affecting abnormal work, electromagnetic interference, human health hazards, etc., and achieve the effect of flexible and convenient use and good wave-absorbing performance

Active Publication Date: 2015-12-30
SUZHOU KUANWEN ELECTRONICS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electromagnetic waves released by electronic products will bring electromagnetic interference to other electronic devices around them, affecting abnormal work; at the same time, they will also cause harm to human health and gradually become serious new environmental pollutants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing a wave-absorbing material, comprising the steps of:

[0020] 1) Weigh each raw material: the composition of raw materials including the following parts by weight: 38 parts of polyacrylonitrile, 12 parts of bamboo fiber, 5 parts of graphite powder, 4 parts of chromium powder, 3 parts of iron powder, 14 parts of ethylene glycol, 10 parts of nitric acid 1,681 parts of antioxidant, 1 part of plasticizer triacetin and 1 part of silane coupling agent KH5501;

[0021] 2) Soak bamboo fiber and graphite powder in nitric acid solution for 2 hours, wash, filter and dry;

[0022] 3) Add chromium powder, iron powder, bamboo fiber and graphite powder treated in step 2) into the ethylene glycol solution, heat up to 120°C and stir, after stirring for 2 hours, wash and filter, and dry to obtain a mixed powder;

[0023] 4) After blending polyacrylonitrile, antioxidant 168, plasticizer, silane coupling agent KH550 and the mixed powder obtained in step 3) evenly, pu...

Embodiment 2

[0026] A method for preparing a wave-absorbing material, comprising the steps of:

[0027] 1) Weigh each raw material: the composition of raw materials including the following parts by weight: 52 parts of polyacrylonitrile, 30 parts of bamboo fiber, 18 parts of graphite powder, 12 parts of chromium powder, 11 parts of iron powder, 28 parts of ethylene glycol, 25 parts of nitric acid 1685 parts of antioxidant, 4 parts of plasticizer epoxy butyl oleate and 3 parts of silane coupling agent KH5503;

[0028] 2) Soak bamboo fiber and graphite powder in nitric acid solution for 2 hours, wash, filter and dry;

[0029] 3) Add chromium powder, iron powder, bamboo fiber and graphite powder treated in step 2) into the ethylene glycol solution, heat up to 150°C and stir, after stirring for 5 hours, wash and filter, and dry to obtain a mixed powder;

[0030] 4) After blending polyacrylonitrile, antioxidant 168, plasticizer, silane coupling agent KH550 and the mixed powder obtained in step ...

Embodiment 3

[0033] A method for preparing a wave-absorbing material, comprising the steps of:

[0034] 1) Weigh each raw material: the composition of raw materials including the following parts by weight: 40 parts of polyacrylonitrile, 21 parts of bamboo fiber, 12 parts of graphite powder, 8 parts of chromium powder, 7 parts of iron powder, 21 parts of ethylene glycol, 13 parts of nitric acid 1683 parts of antioxidant, 2 parts of plasticizer triacetin and 2 parts of silane coupling agent KH5502;

[0035] 2) Soak bamboo fiber and graphite powder in nitric acid solution for 2 hours, wash, filter and dry;

[0036] 3) Add chromium powder, iron powder, bamboo fiber and graphite powder treated in step 2) into the ethylene glycol solution, heat up to 135°C and stir, after stirring for 3 hours, wash and filter, and dry to obtain a mixed powder;

[0037] 4) After blending polyacrylonitrile, antioxidant 168, plasticizer, silane coupling agent KH550 and the mixed powder obtained in step 3) evenly, ...

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Abstract

The invention discloses a wave-absorbing material. The wave-absorbing material comprises the following raw materials in parts by weight: 38-52 parts of polyacrylonitrile, 12-30 parts of bamboo fiber, 5-18 parts of graphite powder, 4-12 parts of chromium powder, 3-11 parts of iron powder, 14-28 parts of ethanol, 10-25 parts of nitric acid, 1-5 parts of an antioxidant, 1-4 parts of a plasticizer and 1-3 parts of a silane coupling agent KH550. The invention further discloses a preparation method of the wave-absorbing material. The reflectivity of the wave-absorbing material prepared by virtue of the preparation method is lower than -7dB in the frequency band range of 6GHz-15GHz, and the minimal reflectivity is (-27.9dB)-(-37.4dB), thereby presenting relatively good wave-absorbing performance; furthermore, the wave-absorbing performance can be correspondingly adjusted according to the thickness of the material, and the use is flexible and convenient.

Description

technical field [0001] The invention belongs to the field of electronic materials, in particular to a wave-absorbing material and a preparation method thereof. Background technique [0002] With the development of the electronics industry, more and more electronic and electrical products have entered people's lives, and the electromagnetic radiation brought by these products has an increasing impact on the environment. The electromagnetic waves released by electronic products will bring electromagnetic interference to other electronic devices around them, affecting abnormal work; at the same time, they will also cause harm to human health and gradually become serious new environmental pollutants. Therefore, the development of absorbing materials that can weaken electromagnetic radiation has attracted much attention. [0003] Absorbing materials refer to a class of materials that can effectively absorb incident electromagnetic waves and attenuate them. It converts incident e...

Claims

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Application Information

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IPC IPC(8): C08L33/20C08L97/02C08K13/06C08K9/02C08K3/04C08K3/08C08K5/053C09K3/00
Inventor 翁宇飞张其笑
Owner SUZHOU KUANWEN ELECTRONICS SCI & TECH
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