MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and preparation method thereof

A polyvinyl alcohol, electromagnetic shielding technology, applied in the field of electromagnetic shielding materials, can solve the problem of shielding that has not been publicly reported, and achieve the effects of good electromagnetic shielding performance, excellent flexibility, and good flexibility

Active Publication Date: 2021-06-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of magnetic material and conductive material is beneficial to optimize the impedance matching properties of the composite material, known as Fe of magnetic iron oxide 3 o 4 Particles meet the characteristics of magnetism; MXene and graphene are intercalated, and magnetic particles Fe are loaded 3 o 4 get Fe 3 o

Method used

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  • MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and preparation method thereof
  • MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and preparation method thereof
  • MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029]Example 1:

[0030]Seefigure 1 , A method for preparing MXENE-based flexible polyvinyl alcohol electromagnetic shield composite film, including the steps of:

[0031]Step 1, etching the aluminum layer in the Max phase with hydrofluoric acid etching, filtered, washed, and dried to give a layered MXENE;

[0032]Step 2, MXENE obtained in step one with graphene is 5: 1 through the ball mill at high speed to obtain MXENE / Graphene complex of MXENE and graphene insertion;

[0033]Step 3, the MXENE / Graphene complex obtained by step I and the nanoparticle Fe3O4The mass ratio is 2: 1 dispersion in deionized water, and the mixed solution is ultrasonically treated, filtered, washed and dried to obtain Fe.3O4@ MXENE / Graphene ternary composite material;

[0034]Step four, will step three from the Fe3O4@ MXENE / Graphene ternary complex and polyvinyl alcohol are dispersed in deionized water, and the mixed solution is stirred until the filler is uniformly dispersed in a polyvinyl alcohol aqueous solut...

Example Embodiment

[0044]Example 2:

[0045]The basis of combining Example 1 is different in that

[0046](1) Put 2G Ti3ALC2Add to 20 mL of 49% hydrofluoric acid solution to stir under room temperature under room temperature to etch Ti3ALC2The aluminum layer is filtered, washed, and dried to obtain layered MXENE;

[0047](2) The obtained MXENE and graphene were mixed with graphene, and 2 h were mixed at a rotational speed of 300 r / mIM in a ball mill to obtain a MXENE / Graphene complex of MXENE and a graphene insertion;

[0048](3) Put MXENE / Graphene complex with nanoparticle Fe3O4Taking the mass ratio of 2: 1 dispersion in deionized water, ultrasonic 2 h at 80 ° C, filtered, washed and dried to get Fe3O4@ MXENE / Graphene ternary composite material;

[0049](4) Put 2G Fe3O4@ MXENE / Graphene ternary complex and 18 g of polyvinyl alcohol are dispersed in 180 g of deionized water, and the mixture is completely dissolved at 100 R / min under 75 ° C for 2 hours to polyvinyl alcohol and the filler is uniform, then t...

Example Embodiment

[0051]Example 3:

[0052]Based on the basis of Example 1-2, it is different.

[0053](1) Put 2G Ti3ALC2Add to 20 mL of 49% hydrofluoric acid solution to stir under room temperature under room temperature to etch Ti3ALC2The aluminum layer is filtered, washed, and dried to obtain layered MXENE;

[0054](2) The obtained MXENE and graphene were mixed with graphene, and 2 h were mixed at a rotational speed of 300 r / mIM in a ball mill to obtain a MXENE / Graphene complex of MXENE and a graphene insertion;

[0055](3) Put MXENE / Graphene complex with nanoparticle Fe3O4Taking the mass ratio of 2: 1 dispersion in deionized water, ultrasonic 2 h at 80 ° C, filtered, washed and dried to get Fe3O4@ MXENE / Graphene ternary composite material;

[0056](4) Put 4G FE3O4@ MXENE / Graphene ternary complex and 16 g of polyvinyl alcohol are dispersed in 180 g of deionized water, and the mixture is completely dissolved at 100 r / min under 75 ° C for 2 hours to polyvinyl alcohol and the filler is uniform, then the...

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Abstract

The invention discloses an MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and a preparation method thereof, and belongs to the technical field of electromagnetic shielding materials. The invention relates to an MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and a preparation method thereof. The preparation method comprises the following steps of: etching an MAX phase with hydrofluoric acid to obtain layered MXene, then intercalating the MXene and graphene to obtain an MXene/Graphene compound, loading magnetic nanoparticles Fe3O4 on the MXene/Graphene to obtain a Fe3O4@MXene/Graphene ternary composite material, and finally dissolving the Fe3O4@MXene/Graphene ternary composite material and polyvinyl alcohol in deionized water and drying to obtain the polyvinyl alcohol composite film. The obtained polyvinyl alcohol film has very good flexibility and has good compatibility with a composite filler, and the electromagnetic shielding effectiveness in the X wave band can reach 38-52 dB. Layered MXene and graphene with good conductivity are beneficial to multi-reflection attenuation of electromagnetic waves, the impedance matching characteristic is optimized through combination with the magnetic particles Fe3O4, and attenuation of the electromagnetic waves is facilitated.

Description

technical field [0001] The invention relates to the technical field of electromagnetic shielding materials, in particular to an MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and a preparation method thereof. Background technique [0002] The rapid development of modern electronic technology has brought serious electromagnetic interference while greatly facilitating social life, and the development trend of light weight and high integration of modern electronic equipment has put forward higher and higher requirements for electromagnetic shielding materials. Although traditional metals and their alloys have very good shielding effectiveness as electromagnetic shielding materials, their defects such as large mass, poor flexibility, high cost, and poor corrosion resistance greatly limit their application in the field of electromagnetic shielding materials. Polymers have attracted more and more attention in the field of electromagnetic shielding ...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L29/04C08K3/14C08K3/04C08K3/22
CPCC08J5/18C08J2300/16C08J2329/04C08K3/14C08K3/042C08K2003/2275C08K2201/011C08K2201/001
Inventor 束庆海姚嫒嫒吕席卷邹浩明杜君宜束红年
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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