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Two-dimensional graphene-wrapped copper composite material with core-shell structure and preparation method and application thereof

A technology of graphene wrapping and composite materials, which is applied in the direction of electrical components, magnetic field/electric field shielding, etc., can solve the problems of unstable physical and chemical properties, reduce the catalytic and electrical conductivity of materials, and ensure the catalytic ability and electrical conductivity. , Avoid oxidation of copper particles, great simplicity

Active Publication Date: 2022-04-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, currently commonly used coating materials such as polymers tend to reduce the catalytic and electrical conductivity of the material, and the physical and chemical properties of these materials are not stable.

Method used

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  • Two-dimensional graphene-wrapped copper composite material with core-shell structure and preparation method and application thereof
  • Two-dimensional graphene-wrapped copper composite material with core-shell structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1: Prepare graphene oxide (GO) dispersion liquid. Graphene oxide (GO) is the oxide of graphene, and its surface contains various oxygen-containing groups such as hydroxyl group and carboxyl group. Since these polar functional groups can interact with water molecules, GO has good dispersibility in water solvents, and a GO dispersion close to a solution can be obtained. Weigh 10 mg of GO into a reagent bottle containing 20 ml of deionized water, and ultrasonically disperse for 60 min to obtain a GO dispersion with a concentration of 0.5 mg / ml.

[0034] Step 2: First, 50 mg of the prepared pure copper powder was uniformly dispersed in 100 ml of deionized water by ultrasonic dispersion, and then 0.3 ml of 3-aminopropyltriethoxysilane (APTES) was added under magnetic stirring. After the temperature was raised to 60° C. and the stirring was continued for 4 hours, the obtained mixed suspension was sealed in a reaction kettle and kept at 100° C. for 24 hours. After the re...

Embodiment 2

[0043] This example relates to a method for preparing polyethylene oxide / graphene-coated copper nanocomposites for electromagnetic shielding, the method comprising the following steps:

[0044] Step 1: Weigh 10 mg of GO into a reagent bottle containing 20 ml of deionized water, and ultrasonically disperse for 60 minutes to obtain a GO dispersion with a concentration of 0.5 mg / ml.

[0045]Step 2: First, 50 mg of the prepared pure copper powder was uniformly dispersed in 100 ml of deionized water by ultrasonic dispersion, and then 0.3 ml of 3-aminopropyltriethoxysilane (APTES) was added under magnetic stirring. After the temperature was raised to 60° C. and the stirring was continued for 4 hours, the obtained mixed suspension was sealed in a reaction kettle and kept at 100° C. for 24 hours. After the reactor was naturally cooled to normal temperature, the precipitate deposited on the bottom of the reactor was collected and washed repeatedly with deionized water. The surface-mod...

Embodiment 3

[0053] This example relates to a method for preparing polyethylene oxide / graphene-coated copper nanocomposites for electromagnetic shielding, the method comprising the following steps:

[0054] Step 1: Prepare graphene oxide (GO) dispersion liquid. Graphene oxide (GO) is the oxide of graphene, and its surface contains various oxygen-containing groups such as hydroxyl group and carboxyl group. Since these polar functional groups can interact with water molecules, GO has good dispersibility in water solvents, and a GO dispersion close to a solution can be obtained. Weigh 10 mg of GO into a reagent bottle containing 20 ml of deionized water, and ultrasonically disperse for 60 min to obtain a GO dispersion with a concentration of 0.5 mg / ml.

[0055] Step 2: First, 50 mg of the prepared pure copper powder was uniformly dispersed in 100 ml of deionized water by ultrasonic dispersion, and then 0.3 ml of 3-aminopropyltriethoxysilane (APTES) was added under magnetic stirring. After th...

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Abstract

The invention discloses a two-dimensional graphene-wrapped copper composite material with a core-shell structure and its preparation method and application. The structure of the graphene-wrapped copper composite material is a core formed by wrapping nano-copper particles with outer graphene Shell structure, the graphene-coated copper composite material is constructed by electrostatic adsorption self-assembly method, graphene-coated copper can not only avoid the oxidation of copper particles, ensure the intrinsic catalytic ability and electrical conductivity of the composite material, but also control the The expansion / compression of the two materials promotes the synergy between the two materials to significantly improve the composite integrity. Two-dimensional graphene-wrapped copper composites with core-shell structure have excellent electromagnetic shielding properties.

Description

technical field [0001] The invention relates to the technical field of electromagnetic shielding materials, in particular to a two-dimensional graphene-wrapped copper composite material with a core-shell structure and its preparation method and application. Background technique [0002] With the popularization of electronic products and the rapid development of the communication industry, more and more attention has been paid to the phenomenon of electromagnetic pollution, and the use of shielding materials to control radiation waves is currently the most effective method. However, traditional electromagnetic shielding materials, such as metals, have been difficult to meet the requirements of many engineering fields due to defects such as high density, high processing difficulty, and poor corrosion resistance. Therefore, the development of new electromagnetic shielding materials has great practical significance. Polymer materials have the characteristics of good mechanical p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00
CPCH05K9/0088
Inventor 吴忠陈景云秦真波邓意达胡文彬
Owner TIANJIN UNIV
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