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Preparation method of self-repairing electromagnetic shielding coated fabric in high-temperature environment

An electromagnetic shielding and high-temperature environment technology, which is applied in textiles and papermaking, etc., can solve the problems of insufficient consideration of the deterioration of electromagnetic shielding performance, electromagnetic wave leakage, oxidative degradation, etc., so as to extend the electromagnetic shielding function, improve the service life, prolong The effect of conduction loss

Pending Publication Date: 2022-07-26
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual combustion process, the above method does not fully consider the influence of the thermal history of the material due to use and the failure of the conductive filler in the thermal environment to the deterioration of its electromagnetic shielding performance.
Once exposed to high temperature or flame, its own conductive network still inevitably suffers from physical structure damage or oxidative degradation, resulting in the leakage of electromagnetic waves
Therefore, just adding a flame retardant coating does not guarantee the stable function of the electromagnetic shielding coating

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of self-repairing electromagnetic shielding coated fabric in high-temperature environment
  • Preparation method of self-repairing electromagnetic shielding coated fabric in high-temperature environment
  • Preparation method of self-repairing electromagnetic shielding coated fabric in high-temperature environment

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Cut a 20×20cm pure cotton fabric, put it in a 1moL / L sodium hydroxide solution, and continue stirring for two hours at 90 °C to remove the excess slurry on the surface and increase the active groups on the surface of the cotton fiber. , washed three times with deionized water, and dried in a 60°C oven for later use.

[0034] Add 20g of ammonium polyphosphate (APP) to a three-necked flask containing 250mL of water, use a stirrer to condense and reflux under the condition of a constant temperature water bath at 80°C and continue to stir for two hours, and weigh 0.2g of γ-aminopropyltriethyl ether. Oxysilane (KH-550) was dissolved in ethanol, prepared into a solution, added to the above three-necked flask and stirred continuously for one hour. The ammonium ion-exchanged silane-modified ammonium polyphosphate was prepared. Ammonium polyphosphate modified with γ-aminopropyltriethoxysilane is used to give its surface amino structure, and pH is adjusted to give its surface a ...

Embodiment 2

[0038] Cut a 20×20cm pure cotton fabric, put it in a 1moL / L sodium hydroxide solution, and continue stirring for two hours at 90 °C to remove the excess slurry on the surface and increase the active groups on the surface of the cotton fiber. , washed three times with deionized water, and dried in a 60°C oven for later use.

[0039] Add 20g of ammonium polyphosphate (APP) to a three-necked flask containing 250mL of water, use a stirrer to condense and reflux under the condition of a constant temperature water bath at 80°C and continue to stir for two hours, and weigh 0.2g of γ-aminopropyltriethyl ether. Oxysilane (KH-550) was dissolved in ethanol, prepared into a solution, added to the above three-necked flask and stirred continuously for one hour. The ammonium ion-exchanged silane-modified ammonium polyphosphate was prepared. Ammonium polyphosphate modified with γ-aminopropyltriethoxysilane was used to give its surface amino structure, and a mixed solution of triethanolamine / ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a preparation method of a self-repairing electromagnetic shielding coating fabric in a high-temperature environment, which comprises the following steps: firstly, loading a conductive compound filler on the surface of a cotton fabric, secondly, uniformly mixing an integrated expansion unit in a polymer matrix, blade-coating the outer surface of a conductive coating, and finally burning in an air environment. The process of preparing the controllable carbonized self-repairing type electromagnetic shielding coating fabric material in the high-temperature combustion environment has good safety, continuous use of the electromagnetic shielding material can be well protected in the extremely severe environment, and the intumescent flame retardant passes through the intumescent carbon layer in the extremely severe environment, so that the electromagnetic shielding coating fabric material can be recycled. The defects caused by the conductive filler are overcome, and the conductivity of the base material can be enhanced, so that the electromagnetic shielding effectiveness of the material is improved. The requirements for the self-repairing electromagnetic shielding material in the current high-temperature severe environment are met, effective feasibility is provided for use of military products, aerospace products and other products in the extremely severe complex environment, and good application prospects are achieved.

Description

technical field [0001] The invention belongs to the production field of the preparation of controllable carbonization self-healing electromagnetic shielding coated fabrics, and particularly relates to a preparation method of self-healing electromagnetic shielding coated fabrics in a high temperature environment. Background technique [0002] With the widespread use of modern integrated smart electronic devices, flexible electronic devices have also received more and more attention. The increasingly complex electromagnetic environment seriously affects the safe and stable use of electronic devices. As a result, flexible electromagnetic shielding materials have become the focus of attention. Textile fabrics have become the first choice for preparing flexible electromagnetic shielding materials because of their unique structure and soft texture. However, the complex circuit system will inevitably generate heat during use, which makes textile flexible electromagnetic shielding ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D06N3/12D06N3/00
CPCD06N3/12D06N3/0063D06N2209/041
Inventor 张艳俞津高宗春陆嘉渔戚栋明
Owner ZHEJIANG SCI-TECH UNIV
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