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A preparation method of electromagnetic shielding material based on boron nitride nanosheet/carbon fiber composite modification

A technology of electromagnetic shielding material and carbon fiber material, applied in shielding materials, magnetic field/electric field shielding, electrical components, etc., can solve the problems of high weight, limitation, decreased corrosion resistance of composite materials, etc., achieve excellent mechanical properties, improve electromagnetic shielding performance effect

Active Publication Date: 2021-03-05
SHENZHEN HECHANG ELECTROMAGNETIC MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the weight of these traditional metal electromagnetic shielding materials is generally high, and the corrosion resistance of composite materials is greatly reduced due to the presence of metal components, which limit the application of metal electromagnetic shielding materials in many fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing an electromagnetic shielding material based on boron nitride nanosheet / carbon fiber composite modification, comprising the following steps:

[0028] (1) Boron nitride powder and isopropanol are mixed, sonicated at a power of 500W, every 30min of sonication, stop for 10min, then continue sonication, a total of 1h of sonication, after the sonication is finished, a dispersion is obtained; wherein, the nitrogen The dosage ratio of boron powder and isopropanol is 1g: 30ml;

[0029] (2) Add silane coupling agent to the dispersion liquid, stir for 30min under the state of 1500 rev / min, then filter, dry the solid, and make boron nitride nanosheets; wherein, the addition amount of silane coupling agent is isopropyl 3% of alcohol mass;

[0030] (3) carrying out nickel-plating treatment on the surface of boron nitride to obtain boron nitride nanosheets with nickel-plated surface;

[0031] (4) Clean the carbon fiber with acetone, dry it, and then use microw...

Embodiment 2

[0034] A method for preparing an electromagnetic shielding material based on boron nitride nanosheet / carbon fiber composite modification, comprising the following steps:

[0035] (1) Boron nitride powder and isopropanol are mixed, sonicated at a power of 1000W, every 30 minutes of sonication, stop for 10 minutes, and then continue to sonicate for a total of 4 hours of sonication, and a dispersion is obtained after the sonication; wherein, the nitrogen The dosage ratio of boron powder and isopropanol is 1g: 60ml;

[0036] (2) Add silane coupling agent to the dispersion liquid, stir for 30min under the state of 3000 rpm, then filter, dry the solid, and make boron nitride nanosheets; wherein, the addition amount of silane coupling agent is isopropyl 6% of alcohol mass;

[0037] (3) carrying out nickel-plating treatment on the surface of boron nitride to obtain boron nitride nanosheets with nickel-plated surface;

[0038] (4) Clean the carbon fiber with acetone, dry it, and then...

Embodiment 3

[0041] A method for preparing an electromagnetic shielding material based on boron nitride nanosheet / carbon fiber composite modification, comprising the following steps:

[0042] (1) Boron nitride powder and isopropanol were mixed, sonicated at a power of 600W, every 30 minutes of sonication, stopped for 10 minutes, and then continued to sonicate for a total of 1.5 hours of sonication, and a dispersion was obtained after the sonication; wherein, the The dosage ratio of boron nitride powder and isopropanol is 1g: 40ml;

[0043] (2) Add the silane coupling agent to the dispersion liquid, stir for 30min under the state of 2000 rpm, then filter, dry the solid, and make boron nitride nanosheets; wherein, the addition amount of the silane coupling agent is isopropyl 4% of alcohol mass;

[0044](3) carrying out nickel-plating treatment on the surface of boron nitride to obtain boron nitride nanosheets with nickel-plated surface;

[0045] (4) Clean the carbon fiber with acetone, dry...

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PUM

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Abstract

The invention discloses a method for preparing an electromagnetic shielding material based on boron nitride nanosheet / carbon fiber composite modification, which specifically comprises the following steps: first preparing boron nitride nanosheet, and then performing nickel-plating treatment on the surface; Carry out microwave plasma etching treatment, then make polyacrylate / carbon fiber material, finally the above-mentioned boron nitride nanosheet, polyacrylate / carbon fiber material, polytetrafluoroethylene resin, plasticizer, crosslinking agent , Antioxidant mixed into a high-speed kneader and mixed for 5 minutes, then extruded and granulated by a twin-screw extruder, and then hot-pressed to obtain an electromagnetic shielding material. The material prepared by the invention has good shielding effect and excellent mechanical properties.

Description

Technical field: [0001] The invention relates to an electromagnetic shielding material, in particular to a method for preparing an electromagnetic shielding material based on boron nitride nanosheet / carbon fiber composite modification. Background technique: [0002] With the rapid development of the modern electronics industry, the number of various military, commercial and household electronic products has increased dramatically, and the miniaturization, integration, light weight and digitization of electronic circuits and components have led to the vulnerability of electronic products used in daily life. Misoperation, image disturbance, and sound disturbance occur due to external electromagnetic wave interference. At the same time, these electronic products themselves emit electromagnetic waves, thereby causing electromagnetic wave pollution. In order to prevent this kind of harm, people often use electromagnetic shielding materials for protection. Since electromagnetic s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08L33/08C08K7/00C08K9/06C08K9/02C08K3/38C08K9/00C08K9/10C08K7/06H05K9/00
CPCC08K2003/385C08K2201/011C08L27/18H05K9/009C08L33/08C08K7/00C08K9/06C08K9/02C08K3/38C08K9/00C08K9/10C08K7/06
Inventor 许文强
Owner SHENZHEN HECHANG ELECTROMAGNETIC MATERIALS CO LTD