Method for improving electromagnetic shielding performance of MXene-based composite fabric material

A technology of composite fabrics and fabric materials, applied in chemical instruments and methods, light-resistant fibers, textiles and papermaking, etc., can solve the problems of low absorption and shielding energy, complex processes, etc., achieve good flexibility and shielding performance, and reduce surface reflections , the effect of reducing absorption loss and reflection loss

Pending Publication Date: 2020-11-27
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems such as low absorption and shielding energy and complex process of current electromagnetic shielding materials, the object of the invention is to provide a method for improving the electromagnetic shielding performance of the composite fabric material based on MXene. The present invention coats the fabric material of MXene with multiple Gradient arrangement according to MXene content, and combined to achieve the electromagnetic shielding characteristics mainly absorption, the obtained composite fabric material has good absorption shielding performance and flexibility

Method used

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  • Method for improving electromagnetic shielding performance of MXene-based composite fabric material
  • Method for improving electromagnetic shielding performance of MXene-based composite fabric material
  • Method for improving electromagnetic shielding performance of MXene-based composite fabric material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Utilize acetone to carry out ultrasonic pretreatment to polypropylene non-woven fabric, remove the oil stain and impurity on fabric surface, clean and dry with distilled water;

[0043] (2) Dip-coat 15 mg / ml MXene aqueous dispersion on the pretreated fabric and vacuum dry, the vacuum drying time is 5-10 hours, and the drying temperature is 45-60°C to obtain MXene-coated polypropylene Non-woven fabric; wherein, the content of MXene on the fabric after drying is 0.06g / cm 2 ;

[0044] (3) The four-layer MXene-coated polypropylene nonwoven fabric prepared in step (2) was stacked neatly, and then hot-pressed and laminated at a temperature of 160-200 ° C to obtain a composite fabric material based on MXene.

[0045] Test the electromagnetic shielding performance of the MXene-based composite fabric material prepared in this embodiment, such as Figure 4-5 As shown, its shielding performance can reach 42 decibels, of which the absorption shielding performance can reach 32...

Embodiment 2

[0047] Prepare the composite fabric material based on MXene according to the method of Example 1, the difference is that in step (2), the MXene aqueous dispersion of 30 mg / ml is used to dip-coat on the pretreated fabric, after drying, the fabric The content of MXene is 0.14g / cm 2 .

[0048] Test the electromagnetic shielding performance of the MXene-based composite fabric material prepared in this embodiment, such as Figure 4-5 As shown, its shielding performance can reach 53 decibels, of which the absorption and shielding performance can reach 41 decibels.

Embodiment 3

[0050] Prepare the composite fabric material based on MXene according to the method of Example 1, the difference is that, in step (2), the MXene water dispersion of 45 mg / ml is used to dip-coat on the pretreated fabric, after drying, the fabric The content of MXene is 0.25g / cm 2 .

[0051] Test the electromagnetic shielding performance of the MXene-based composite fabric material prepared in this embodiment, such as Figure 4-5 As shown, its shielding performance can reach 66 decibels, of which the absorption shielding performance can reach 53 decibels.

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Abstract

The invention relates to a method for improving the electromagnetic shielding performance of an MXene-based composite fabric material, and aims to overcome the defects of low absorption and shieldingefficiency, poor flexibility, complex preparation process and the like of an electromagnetic shielding material on the market at present. The method comprises the following steps: etching an MAX phasemicron sheet by using a chemical etching method to prepare a few layers of MXene dispersion liquid, dip-coating a fabric material, carrying out gradient arrangement on multiple layers of fabric materials coated with MXene according to the MXene content, and compounding to obtain the MXene-based composite fabric material. The total electromagnetic shielding performance of the prepared composite fabric material can reach 91 decibels, the absorption and reflection shielding efficiency can be adjusted through different gradient structures, and the electromagnetic shielding characteristic mainly based on absorption is achieved.

Description

technical field [0001] The invention relates to electromagnetic shielding materials, in particular to a method for improving the electromagnetic shielding performance of MXene-based composite fabric materials. Background technique [0002] From daily life to military facilities, when human beings use these convenient and efficient equipment, the electromagnetic radiation generated by these equipment not only affects the normal use of electronic and electrical equipment, but also endangers human health, and even threatens life safety. Therefore, in order to reduce the intensity of electromagnetic radiation, prevent damage from electromagnetic radiation, and ensure the normal operation of electrical equipment, various electromagnetic shielding products have emerged as the times require, and are developing rapidly. The demand for the performance of electromagnetic shielding materials is also gradually tending to be lighter and more flexible. Better performance and easier proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/02B32B27/12B32B27/32B32B33/00B32B37/06B32B37/10B32B38/00D06M11/73D06M11/64D06M101/20
CPCB32B5/02B32B5/26B32B27/12B32B33/00B32B37/06B32B37/10B32B38/00D06M11/73D06M11/64B32B2255/02B32B2255/20B32B2262/0253B32B2250/242B32B2307/212B32B2307/546D06M2101/20D06M2200/25
Inventor 赵燕唐婷婷
Owner SUZHOU UNIV
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