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MXene/zinc-manganese ferrite/foamed silicone rubber wave-absorbing composite material as well as preparation method and application thereof

A technology of foamed silicone rubber and composite materials, applied in the direction of magnetic field/electric field shielding, electrical components, etc., can solve the problems of high density, lack of elasticity and flexibility, low magnetic permeability of cobalt ferrite, etc., and achieve simple technical methods, The effect of reducing the weight and improving the absorbing performance

Pending Publication Date: 2022-02-18
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology can achieve a large effective absorption bandwidth, because the magnetic permeability of cobalt ferrite may be low, the magnetic loss of the composite material is small, and the minimum reflection loss of the composite material is biased compared with the existing technology. High, so the absorbing performance still needs to be improved
[0007] In the above prior art, based on MXene and its hybrid wave absorbing agent, they are only applied in paraffin matrix, but not in polymer matrix such as silicone rubber, so the existing wave absorbing composite materials lack elasticity and flexibility; In addition, the density of ferrite and other magnetic powders is relatively high, so it is difficult to prepare low-density, strong-absorbing wave-absorbing elastomer materials

Method used

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  • MXene/zinc-manganese ferrite/foamed silicone rubber wave-absorbing composite material as well as preparation method and application thereof
  • MXene/zinc-manganese ferrite/foamed silicone rubber wave-absorbing composite material as well as preparation method and application thereof
  • MXene/zinc-manganese ferrite/foamed silicone rubber wave-absorbing composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The mass percentages of each component of the MXene / zinc-manganese ferrite / foamed silicone rubber wave-absorbing composite material are:

[0045] MXene / ZMF hybrid absorber 75%

[0046] Vinyl silicone oil (2500mPa·s) 22%

[0047] Hydrogen-containing silicone oil (hydrogen content 1.5%) 0.8%

[0048] Hydroxy silicone oil (hydroxyl content 3%) 2%

[0049] Methylvinylsiloxane Platinum Complex 0.19%

[0050] Ethynylcyclohexanol 0.01%

[0051] A preparation method of MXene / zinc-manganese ferrite / foamed silicone rubber wave-absorbing composite material, comprising the following steps:

[0052] (1) Add 4g LiF and 40ml 6mol L to a Teflon cup with screw cap -1 Concentrated hydrochloric acid, stirred for 30min; then slowly added 4g Ti to the solution 3 AlC 2 , and the temperature was raised to 40°C for 48h. After the etching, the reaction product was repeatedly washed and centrifuged with deionized water, and the centrifugation condition was 3500 rpm×5 min until the pH val...

Embodiment 2

[0058] The mass percentages of each component of the MXene / zinc-manganese ferrite / foamed silicone rubber wave-absorbing composite material are:

[0059]

[0060] A preparation method of MXene / zinc-manganese ferrite / foamed silicone rubber wave-absorbing composite material, comprising the following steps:

[0061] (1) Add 4g LiF and 40ml 9mol L to a Teflon cup with screw cap -1 Concentrated hydrochloric acid, stirred for 30min; then slowly added 4g Ti to the solution 3 AlC 2 , and the temperature was raised to 40°C for 48h. After the etching, the reaction product was repeatedly washed and centrifuged with deionized water, and the centrifugation condition was 3500 rpm×5 min until the pH value of the supernatant was equal to 7. Finally, the precipitate was freeze-dried for 16 h to obtain MXene.

[0062] (2) Weigh 0.075g of zinc chloride, 0.257g of manganese chloride, 2g of ferric sulfate, 3.467g of MXene and 40g of deionized water into a plastic cup with a screw cap, and st...

Embodiment 3

[0065] The mass percentages of each component of the MXene / zinc-manganese ferrite / foamed silicone rubber wave-absorbing composite material are:

[0066]

[0067] A preparation method of MXene / zinc-manganese ferrite / foamed silicone rubber wave-absorbing composite material, comprising the following steps:

[0068] (1) Add 4g LiF and 40ml 6mol L to a Teflon cup with screw cap -1 Concentrated hydrochloric acid, stirred for 30min; then slowly added 4g Ti to the solution 3 AlC 2 , and the temperature was raised to 40°C for 48h. After the etching, the reaction product was washed three times and centrifuged three times with deionized water, and the centrifugation condition was 3500 rpm×5 min until the pH value of the supernatant was equal to 7. Finally, the precipitate was freeze-dried for 16 hours at a cold trap temperature of -65°C to obtain MXene.

[0069] (2) First, weigh 0.076g of zinc chloride, 0.257g of manganese chloride, 2g of ferric chloride, 3.496g of MXene and 30g o...

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Abstract

The invention discloses an MXene / zinc-manganese ferrite / foamed silicone rubber wave-absorbing composite material as well as a preparation method and application thereof. The composite material is prepared from an MXene / zinc-manganese ferrite hybrid wave-absorbing agent, vinyl silicone oil, hydrogen-containing silicone oil, hydroxyl silicone oil, a platinum catalyst and an inhibitor through heat vulcanization foaming. According to the MXene / zinc-manganese ferrite hybrid wave-absorbing agent, zinc-manganese ferrite grows on the surface of MXene and between sheet layers in situ. The composite material is a wave-absorbing composite material with light weight, broadband, strong absorption and flexibility, has certain functions of heat preservation, heat insulation, damping, noise reduction and the like, can be widely applied to the fields of electronics, electric appliances, communication, power batteries, military industry and the like, can be used for preparing low-density broadband wave-absorbing sheets through high-precision rolling and hot drying tunnel vulcanization processes, and is attached to the surfaces of electronic equipment and components needing to absorb waves.

Description

technical field [0001] The invention relates to a wave-absorbing elastic body material, in particular to an MXene / zinc-manganese ferrite / foamed silicone rubber wave-absorbing composite material and its preparation method and application. Background technique [0002] With the rapid development of the electronic communication industry in modern society, electromagnetic radiation pollution may not only interfere with the normal operation of electronic equipment, but also endanger human sleep and normal endocrine. Therefore, it is of great social significance and economic value to develop new and efficient electromagnetic wave absorbing materials (referred to as wave absorbing materials) to prevent electromagnetic waves from affecting electronic equipment and human health. [0003] Traditional absorbing materials mainly include ferrite, magnetic metal powder, and metal alloys. These traditional absorbing agents exhibit good absorbing properties because of their magnetic propert...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/05C08L83/04C08K3/14C08K9/02C08K3/22C08J9/00H05K9/00
CPCC08J9/0066C08J9/0061C08J9/009H05K9/0083C08J2383/07C08J2483/05C08J2483/04
Inventor 郭建华尹镇航蒋兴华
Owner SOUTH CHINA UNIV OF TECH
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