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Superhydrophobic conductive composite fabric with electromagnetic shielding performance and preparation method thereof

A composite fabric and electromagnetic shielding technology, which is applied in the fields of magnetic field/electric field shielding, electrical components, textiles and papermaking, etc., can solve the fundamental problems of silver-based electromagnetic shielding materials, the decline in conductivity and electromagnetic interference shielding performance, and the metal is easy to be damaged Oxidation and even corrosion problems, to achieve excellent electromagnetic shielding performance, excellent super-hydrophobic performance, and short time-consuming effects

Active Publication Date: 2019-05-07
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods have achieved good results, they still have not solved the fundamental problem of silver-based electromagnetic shielding materials.
When the above CPFCs are subjected to external forces such as friction and bending, their electrical conductivity and EMI shielding performance may drop sharply
In addition, metals used as conductive fillers are easily oxidized and even corroded when the material is exposed to harsh environments such as moisture, acid, etc.
These shortcomings greatly limit the application of CPFCs in industry and life

Method used

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  • Superhydrophobic conductive composite fabric with electromagnetic shielding performance and preparation method thereof
  • Superhydrophobic conductive composite fabric with electromagnetic shielding performance and preparation method thereof
  • Superhydrophobic conductive composite fabric with electromagnetic shielding performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh 0.4 g of dopamine, 0.24 g of tris (Tris), and 200 g of distilled water. Dissolve dopamine and Tris in water, cut a commercially purchased PP non-woven fabric into 2cm×2cm and soak it, stir it magnetically for 12 hours, take it out, wash it and dry it in an oven at 60°C. Next, 1.5 g of silver trifluoroacetate was dissolved in 6 g of ethanol to prepare a 20 wt.% STA solution. Soak the dried PP non-woven fabric in silver trifluoroacetate solution for 40 minutes, take it out and reduce it with 50 wt.% hydrazine hydrate solution for 30 minutes. The reduced conductive fabric was washed with distilled water and dried in an oven at 40°C. Weigh 0.1g polydimethylsiloxane (PDMS) and 0.01g curing agent, and dissolve them in 9.9g n-heptane, the mass fraction of PDMS is 1%. The dried conductive composite fabric was placed in the PDMS solution for 40 minutes, and then cured at 80° C. for 1 hour to obtain a superhydrophobic conductive composite fabric. The microscopic morp...

Embodiment 2

[0034] (1) Weigh 0.4 g of dopamine, 0.24 g of tris (Tris), and 200 g of distilled water. Dissolve dopamine and Tris in water, cut a commercially purchased PP non-woven fabric into 2cm×2cm and soak it, stir it magnetically for 12 hours, take it out, wash it and dry it in an oven at 60°C. Next, 1.5 g of silver trifluoroacetate was dissolved in 4.5 g of ethanol to prepare a 25 wt.% STA solution. Soak the dried PP non-woven fabric in silver trifluoroacetate solution for 40 minutes, take it out and reduce it with 50 wt.% hydrazine hydrate solution for 30 minutes. The reduced conductive fabric was washed with distilled water and dried in an oven at 40°C. Weigh 0.1g polydimethylsiloxane (PDMS) and 0.01g curing agent, and dissolve them in 9.9g n-heptane, the mass fraction of PDMS is 1%. The dried conductive composite fabric was placed in the PDMS solution for 40 minutes, and then cured at 80° C. for 1 hour to obtain a superhydrophobic conductive composite fabric. The microscopic mo...

Embodiment 3

[0039] This embodiment is basically the same as Embodiment 2, the only difference is that the soaking time of 1wt.% PDMS is shortened to 20 minutes. Specifically: weigh 0.4 g of dopamine, 0.24 g of tris (Tris), and 200 g of distilled water. Dissolve dopamine and Tris in water, cut a commercially purchased PP non-woven fabric into 2cm×2cm, soak it for 12h with magnetic stirring, and then take it out, wash it and dry it in an oven at 60°C. Next, 1.5 g of silver trifluoroacetate was dissolved in 4.5 g of ethanol to prepare a 25 wt.% STA solution. Soak the dried PP non-woven fabric in silver trifluoroacetate solution for 40 minutes, and then take it out and reduce it with 50 wt.% hydrazine hydrate solution for 30 minutes. The reduced conductive fabric was washed with distilled water and dried in an oven at 40°C. Weigh 0.1g polydimethylsiloxane (PDMS) and 0.01g curing agent, and dissolve them in 9.9g n-heptane, the mass fraction of PDMS is 1%. The dried conductive composite fabr...

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Abstract

The invention discloses a superhydrophobic conductive composite fabric with the electromagnetic shielding performance and a preparation method thereof. The method comprises the steps that a polypropylene non-woven fabric is immersed in a dopamine solution, a self-polymerization reaction is conducted to obtain polypropylene non-woven fabric with the surface modified with polydopamine, then the fabric is immersed in a silver trifluoroacetate ethanol solution, a hydrazine hydrate solution is added for reduction, and finally the fabric is immersed in a PDMS n-heptane solution to obtain the superhydrophobic conductive composite fabric with the electromagnetic shielding performance. The conductivity of the superhydrophobic conductive composite fabric is up to 80 S / cm, the 72-dB electromagnetic shielding efficiency is achieved, the superhydrophobic performance is achieved, and the contact angle can reach 152 degrees, and excellent electromagnetic shielding performance can still be kept through multiple abrasion and winding and acid corrosion for 20 hours, and the fabric has the excellent abrasion resistance and corrosion resistance performance.

Description

technical field [0001] The invention relates to a super-hydrophobic conductive composite fabric with electromagnetic shielding performance and a preparation method thereof, belonging to the technical field of preparation of conductive polymer composite materials. Background technique [0002] Electromagnetic pollution not only affects the normal operation of nearby electronic equipment, but also threatens human health. Therefore, it is very important and urgent to study high-performance electromagnetic interference (Electromagnetic Interference, EMI) shielding materials. [0003] Traditional metal-based materials are widely used in EMI shielding due to their excellent intrinsic conductivity, but their further applications are limited due to their shortcomings such as high density, poor corrosion resistance, and poor flexibility. Compared with traditional metal-based materials, conductive polymer composites (Conductive Polymer Composites, CPC) have unique properties such as ...

Claims

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Application Information

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IPC IPC(8): D06M15/61D06M11/83C08G73/06H05K9/00D06M101/20
Inventor 高杰峰骆俊晨王浩黄学武汪玲
Owner YANGZHOU UNIV
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