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A neoprene-based non-magnetic wave-absorbing patch material and preparation method thereof

A technology of chloroprene rubber and wave-absorbing patch, which is applied in the field of civil wave-absorbing materials, can solve the problems of specific gravity restriction, high density of magnetic absorbent, easy to fall off, etc., and achieve poor mechanical properties, high tensile strength, and easy operation Effect

Active Publication Date: 2017-11-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the invention is: the density of the magnetic absorber is generally large, the absorbing effect in the low frequency band is not good, it is difficult to meet the characteristics of the new wave absorbing material with light weight and strong absorbing ability, and the frequency band of the coated wave absorbing material The shortcomings of narrow, easy to fall off, thick coating, and large specific gravity severely restrict the development of wave-absorbing materials. A neoprene-based non-magnetic wave-absorbing patch material and its preparation method are provided.

Method used

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  • A neoprene-based non-magnetic wave-absorbing patch material and preparation method thereof
  • A neoprene-based non-magnetic wave-absorbing patch material and preparation method thereof
  • A neoprene-based non-magnetic wave-absorbing patch material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] The neoprene composite non-magnetic wave-absorbing patch material provided in this embodiment is made of neoprene, absorbent, zinc oxide, vulcanizing agent and accelerator.

[0036] The neoprene CR232 is used as the base material of the product in this embodiment.

[0037] The absorber adopts non-magnetic material carbon nanotube.

[0038] The vulcanizing agent adopts zinc oxide and light magnesium oxide.

[0039] The accelerator adopts NA22 accelerator.

[0040] The chloroprene rubber composite non-magnetic wave-absorbing patch material provided in Example 1 above can be made by the method provided in the following examples.

Embodiment 2

[0042] Accurately weigh neoprene, zinc oxide, magnesium oxide, carbon nanotubes, accelerator NA22 according to the mass ratio of 100:5:4:5:1. Neoprene, zinc oxide, magnesium oxide and carbon nanotubes were mixed on a double-roller open mill, bagged in triangles and pillows 20 times, and thinned 20 times. Mix for 30 minutes, add accelerator NA22, mix for 8 minutes and then release the tablet. Use a flat vulcanizer to vulcanize the mixed raw rubber at a temperature of 145°C and a pressure of 10MPa. The vulcanization time for a patch with a thickness of 3mm is 40min. A sheet-shaped absorbing material with a specification of 300mmX300mm is produced.

[0043] The microwave absorption performance of the patch is measured by the bow reflection method, and the test frequency is 2-18GHz. Before the test starts, the vector network analyzer should be turned on and warmed up for 30 minutes. Each patch needs to measure 3 frequency bands, namely 2-6GHz, 4-8GHz, 8-18GHz. Comprehensive 3-...

Embodiment 3

[0045] Accurately weigh neoprene, zinc oxide, magnesium oxide, carbon nanotubes, accelerator NA22 according to the mass ratio of 100:4:4:5:1. Neoprene, zinc oxide, magnesium oxide and carbon nanotubes were mixed on a double-roller open mill, bagged in triangles and pillows 20 times, and thinned 20 times. Mix for 30 minutes, add accelerator NA22, mix for 8 minutes and then release the tablet. Use a flat vulcanizer to vulcanize the mixed raw rubber at a temperature of 145°C and a pressure of 10MPa. The vulcanization time for a patch with a thickness of 3mm is 40min. A sheet-shaped absorbing material with a specification of 300mmX300mm is produced.

[0046] The microwave absorption performance of the patch is measured by the bow reflection method, and the test frequency is 2-18GHz. Before the test starts, the vector network analyzer should be turned on and warmed up for 30 minutes. Each patch needs to measure 3 frequency bands, namely 2-6GHz, 4-8GHz, 8-18GHz. Comprehensive 3-...

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Abstract

The invention discloses a neoprene-based nonmagnetic microwave absorbing patch material and a preparation method thereof. The neoprene-based nonmagnetic microwave absorbing patch material is prepared from neoprene, carbon nanotubes, a vulcanizing agent and an accelerant in the ratio of the neoprene to the carbon nanotubes to the vulcanizing agent to the accelerant being 100:(1-15):(4-15):(0.5-1.5). The preparation method of the neoprene-based nonmagnetic microwave absorbing patch material comprises the steps of preparing components, and green glue stock; loading the green glue stock in trigonal bags and pillow bags for 10-20 times, performing tight roll grinding for 10-20 times, adding the accelerant, then performing milling for 5-10 min once again, outputting patches, and performing vulcanizing and forming treatment on the milled patches. The neoprene-based nonmagnetic microwave absorbing patch material disclosed by the invention is simple and convenient to operate, effectively solves the problems that conventional wave patches are poor in performance, and also solves the problem that a magnetic adsorbent cannot have the advantages of being low in area density, powerful in absorption at a low-frequency position and the like.

Description

technical field [0001] The invention belongs to the field of civil wave-absorbing materials, and in particular relates to a neoprene-based non-magnetic wave-absorbing patch material and a preparation method. Background technique [0002] With the development of electronic information technology, the electromagnetic radiation in people's life is increasing, and the electromagnetic pollution is becoming more and more serious. The absorbing materials are getting more and more attention. According to the different loss mechanisms, absorbing materials can be divided into dielectric absorbing materials and magnetic absorbing materials. Although magnetic absorbers have good electromagnetic properties, their density is generally high, which makes it difficult to meet the light weight characteristics of new absorbing materials. According to the forming process and bearing capacity of the material, the absorbing material can be divided into two categories: coating type and structural...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L11/00C08K13/04C08K7/24C08K3/22
CPCC08K3/22C08K7/24C08K13/04C08K2003/222C08K2003/2296C08K2201/014C08L11/00
Inventor 石敏先肖蒙庄海燕刘天祥范珊珊黄志雄
Owner WUHAN UNIV OF TECH
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