Method of preparing super light electromagnetic shielding composite materials

A technology of electromagnetic shielding and composite materials, applied in shielding materials, magnetic field/electric field shielding, electrical components, etc., can solve problems such as reducing the mechanical properties of composite materials

Inactive Publication Date: 2018-03-20
TIANJIN POLYTECHNIC UNIV
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently researched conductive polymer composite materials reduce the overall mechanical properties of the composite materials while achieving ultra-light and high electromagnetic efficiency, which is difficult to meet the actual needs.

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of preparing super light electromagnetic shielding composite materials
  • Method of preparing super light electromagnetic shielding composite materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Soak the carbon paper in ethanol solution for 1 h, then take it out and dry it. Immerse the cleaned and dried carbon paper in the electrolyte solution for 1 h, in which the concentration of aniline monomer is 0.2 mol / L, and the concentration of hydrochloric acid is 1 mol / L. Then, under the three-electrode system (the working electrode is carbon paper impregnated with electrolyte, the counter electrode is carbon rod, and the reference electrode is a saturated calomel electrode), cyclic voltammetry is adopted, the working potential is -0.2 ~ 0.9V, and the scanning rate is 50mV / S, the obtained cyclic voltammetry curve is as follows figure 1 As shown, the reaction temperature of the system is 25°C, the reaction time is 15 minutes, and a conductive polyaniline fiber network is formed on the carbon paper. The carbon paper-polyaniline composite structure was washed several times in water and ethanol, and then dried, such as figure 2 shown.

[0017] The above-prepared carbo...

Embodiment 2

[0019] The carbon paper was soaked in acetone solution and ultrasonically cleaned for 0.5 h, and then taken out for drying. Then soak the cleaned and dried carbon paper in the electrolyte for 2 hours, in which the concentration of aniline monomer is 0.5 mol / L, and the concentration of sulfuric acid is 0.5 mol / L. Then under the three-electrode system (the working electrode is carbon paper impregnated with electrolyte, the counter electrode is a platinum sheet, and the reference electrode is a saturated calomel electrode), the constant current method is adopted, and the sample current density is 2mA / cm 2 , the scanning rate is 25mV / S, the reaction temperature of the system is 20°C, and the reaction time is 10 minutes, and the conductive polyaniline fiber network is polymerized on the carbon paper. Then the carbon paper-polyaniline composite structure was rinsed several times in water and ethanol, and dried.

[0020] The above-prepared carbon paper-polyaniline composite structur...

Embodiment 3

[0022] Soak the carbon paper in ethyl acetate solution and ultrasonically clean it for 1 h, then take it out and dry it. Then soak the cleaned and dried carbon paper in the electrolyte for 1 h, in which the concentration of aniline monomer is 0.75 mol / L, and the concentration of nitric acid is 1 mol / L. Then under the three-electrode system (the working electrode is carbon paper impregnated with electrolyte, the counter electrode is carbon rod, and the reference electrode is silver chloride electrode), the constant potential method is adopted, the sample potential is 0.75V, and the scanning rate is 50mV / S , the system reaction temperature is 28° C., and the reaction time is 20 minutes, and the conductive polyaniline fiber network is polymerized on the carbon paper. Then the carbon paper-polyaniline composite structure was rinsed several times in water and ethanol, and dried.

[0023] The carbon paper-polyaniline composite structure prepared above was combined with conductive e...

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
Login to view more

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
densityaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method of preparing super light electromagnetic shielding composite materials. The method of preparing super light electromagnetic shielding composite materials includes thesteps: putting a piece of carbon fiber paper which is cleaned and dried in an electrochemical three-electrode system, by means of the electrochemical polymerization technique, polymerizing and depositing one layer of conductive polyaniline fibrous reticulum on the fiber surface of the carbon fiber paper and between fibers, and constructing a carbon paper-polyaniline structural body with multi-scale and complete conductive network, increasing the interface adhesiveness between the carbon fiber paper and the resin matrix at the same time, and obtaining the composite material with high mechanical strength, lightweight and substantial electromagnetic shielding efficiency.

Description

technical field [0001] The invention relates to the field of carbon-based electromagnetic shielding materials, in particular to a method for preparing electromagnetic shielding materials by compounding polyaniline-modified carbon fiber paper and resin. Background technique [0002] With the rapid development of the electronics industry, a large number of electrical appliances and electronic equipment are widely used in industrial production and people's daily life, which brings convenience to people and also endangers people's health. For example, the widespread use of personal computers and portable electronic devices has led to serious electromagnetic interference pollution, electromagnetic interference radiation in free space and ubiquitous radiation sources have caused serious harm to human health and the normal operation of electronic devices. Therefore, various A variety of electromagnetic shielding materials came into being. The so-called electromagnetic shielding is...

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
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00C08L63/00C08L79/02C08K7/06C08G73/00
CPCH05K9/009C08G73/00C08L63/00C08L2203/20C08L79/02C08K7/06
Inventor 徐志伟王开丽王海波李楠刘梁森单明景傅宏俊牛家嵘
Owner TIANJIN POLYTECHNIC UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap