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A kind of modified carbon fiber, preparation method and application

A technology for modifying carbon and carbon fiber, which is applied in shielding materials, magnetic field/electric field shielding, electrical components, etc. It can solve problems such as easy agglomeration and poor dispersion, and achieve the effects of enhancing roughness, improving electrical conductivity, and improving interface properties

Active Publication Date: 2021-11-30
LUOYANG CUTTING EDGE EQUIP TECH LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The modified carbon fiber provided by the present invention solves the problem of poor dispersion and easy agglomeration of small-scale fillers in the modified material. The filler in the modified carbon fiber is uniformly dispersed and has excellent electromagnetic shielding performance; the resin composite made of the modified carbon fiber The material takes into account good electromagnetic shielding performance and mechanical strength

Method used

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  • A kind of modified carbon fiber, preparation method and application
  • A kind of modified carbon fiber, preparation method and application

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preparation example Construction

[0056] The present invention also provides a kind of preparation method of modified carbon fiber, comprises the following steps:

[0057] a) Immersing dopamine-modified carbon fibers into a solution containing substance A to obtain substance A-dopamine-modified carbon fibers;

[0058] The substance A is a compound or polymer containing an active amino group;

[0059] b) under alkaline conditions, the substance A-dopamine-modified carbon fiber and dopamine-modified filler are mixed and reacted in the liquid phase to obtain filler-modified carbon fiber;

[0060] The dopamine-modified filler includes dopamine-modified magnetic particles and / or dopamine-modified carbon nanomaterials;

[0061] c) Carbonizing the filler-modified carbon fibers to obtain modified carbon fibers.

[0062] In the modified carbon fiber preparation method provided by the present invention, firstly provide dopamine modified carbon fiber, the dopamine modified carbon fiber is composed of carbon fiber mater...

Embodiment 1

[0088] according to figure 1 The process shown in the preparation of composite materials specifically includes the following steps:

[0089] (1) Add dopamine (DA) into the Tris-HCl buffer solution with a pH value of 8.5 to prepare a DA / Tris-HCl buffer solution with a DA concentration of 1 mg / mL and stir evenly; then the desized carbon fiber fabric (CF ) immersed in DA / Tris-HCl buffer solution at room temperature for 12 hours; then washed three times with deionized water and dried at 80-100°C to prepare dopamine-modified carbon fibers (DA-CF).

[0090] (2) Add DA-CF to 1 mg / mL polyethyleneimine solution, and immerse at room temperature for 2 hours to obtain polyethyleneimine-modified carbon fiber (PEI-CF).

[0091] (3) Dopamine (DA) is added to the Tris-HCl buffer solution with a pH value of 8.5 to prepare a DA / Tris-HCl buffer solution with a DA concentration of 1 mg / mL and stir evenly; then ferric iron tetroxide nanoparticles Add to DA / Tris-HCl buffer at room temperature to ...

Embodiment 2

[0096] (1) Add dopamine (DA) into the Tris-HCl buffer solution with a pH value of 8.5 to prepare a DA / Tris-HCl buffer solution with a DA concentration of 2 mg / mL and stir evenly; then the desized carbon fiber fabric (CF ) immersed in DA / Tris-HCl buffer solution at room temperature for 24-36h; then washed three times with deionized water and dried at 80-100°C to prepare dopamine-modified carbon fibers (DA-CF).

[0097] (2) Add DA-CF to 2 mg / mL polyethyleneimine solution, and soak at room temperature for 1-2h to obtain polyethyleneimine-modified carbon fiber (PEI-CF).

[0098] (3) Dopamine (DA) is added to the Tris-HCl buffer solution with a pH value of 8.5 to prepare a DA / Tris-HCl buffer solution with a DA concentration of 2 mg / mL and stir evenly; Add it to DA / Tris-HCl buffer solution to prepare a mixed solution with a Ni concentration of 1 mg / mL, ultrasonicate at 200 W for 60 minutes, then magnetically stir the mixed solution at room temperature for 24 hours; finally wash with...

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Abstract

The invention belongs to the technical field of electromagnetic shielding, and in particular relates to a modified carbon fiber, a preparation method and an application. The modified carbon fiber provided by the present invention is prepared according to the following steps: a) immersing the dopamine-modified carbon fiber in a solution containing substance A to obtain substance A-dopamine-modified carbon fiber; b) under alkaline conditions, the substance A ‑ Dopamine-modified carbon fiber and dopamine-modified filler are mixed and reacted in the liquid phase to obtain filler-modified carbon fiber; c) carbonizing the filler-modified carbon fiber to obtain modified carbon fiber. The invention solves the problem of poor dispersion and easy agglomeration of small-scale fillers in the modified material, and provides uniform fillers in the modified carbon fiber with excellent electromagnetic shielding performance; the resin composite material made of the modified carbon fiber has good performance Electromagnetic shielding performance and mechanical strength.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic shielding, and in particular relates to a modified carbon fiber, a preparation method and an application. Background technique [0002] Carbon fiber (CF) is a special fiber composed of carbon elements. It has the characteristics of high temperature resistance, friction resistance, electrical conductivity, heat conduction and corrosion resistance. It is fibrous in shape, soft and can be processed into various fabrics. The main purpose of carbon fiber is to compound with resin, metal, ceramics and carbon as a reinforcing material to manufacture advanced composite materials. [0003] In recent years, the application of carbon fiber reinforced resin matrix composites in the field of electromagnetic shielding has become more and more extensive. In order to improve the market competitiveness of carbon fiber reinforced resin matrix composites, a certain amount of functional fillers are usually ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K9/02C08K9/04C08K7/06C08L63/02H05K9/00
CPCC08K7/06C08K9/02C08K9/04C08K9/08C08K9/10C08K2201/001H05K9/009C08L63/00
Inventor 刘若鹏赵治亚陈金传
Owner LUOYANG CUTTING EDGE EQUIP TECH LTD
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