A kind of graphene-silver composite fiber and preparation method thereof

A graphene fiber and composite fiber technology, applied in the direction of carbon fiber, fiber treatment, fiber chemical characteristics, etc., can solve problems such as weak adhesion, and achieve the effect of less time and energy consumption, good performance, and dense fiber structure

Active Publication Date: 2019-08-20
杭州德烯科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, unlike other carbon materials, there is a superlubricating effect between graphene and metal, and the adhesion between the two is weak, which brings great challenges to the direct silver plating on the surface of graphene materials.

Method used

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  • A kind of graphene-silver composite fiber and preparation method thereof
  • A kind of graphene-silver composite fiber and preparation method thereof
  • A kind of graphene-silver composite fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of electroplating method prepares the method for graphene and silver composite fiber, comprises following process:

[0026] (1) Utilize the wet spinning method to prepare graphene oxide fibers with a diameter of 3 microns, specifically: the spinning solution of wet spinning is: graphene oxide with a sheet diameter of 4 microns (Carbon Gu Shangxi) In the dispersion liquid in dimethylformamide, the concentration of graphene oxide is 2mg / mL; The inner diameter of spinning head is 60 microns; The coagulation bath is the mixed solution of ethyl acetate and dichloromethane (the volume ratio of the two is 2 : 1), the external heating temperature when receiving wire is 130 ℃.

[0027] (2) Place the graphene oxide fiber in a high-temperature furnace for heating and reduction at a temperature of 1200° C. After heating for 1 hour, a graphene fiber with a diameter of 3 microns is obtained.

[0028] (3) Graphene fiber is fixed on the negative electrode of electroplating tank...

Embodiment 2

[0030] A kind of electroplating method prepares the method for graphene and silver composite fiber, comprises following process,

[0031] (1) Prepare graphene oxide fibers with a diameter of 12 microns by wet spinning method, specifically: the spinning solution of wet spinning is: graphene oxide with a sheet diameter of 8 microns (Carbon Valley Shangxi) In the dispersion liquid in dimethylformamide, the concentration of graphene oxide is 10mg / mL; The inner diameter of spinning head is 250 microns; The coagulation bath is the mixed solution of ethyl acetate and dichloromethane (both volume ratios are 150 : 1), the external heating temperature when receiving wire is 180 ℃.

[0032] (2) Put the graphene oxide fiber in a high-temperature furnace for heating and reduction again, the temperature is 1500°C, after heating for 3 hours, a graphene fiber with a diameter of 12 microns is obtained;

[0033] (3) Graphene fibers are fixed on the negative electrode of the electroplating tank...

Embodiment 3

[0035] A kind of electroplating method prepares the method for graphene and silver composite fiber, comprises following process:

[0036] (1) Prepare graphene oxide fibers with a diameter of 20 microns by wet spinning method, specifically: the spinning solution of wet spinning is: graphene oxide with a sheet diameter of 50 microns (Carbon Valley Shangxi) In the dispersion liquid in dimethylformamide, the concentration of graphene oxide is 9mg / mL; The internal diameter of spinning head is 500 microns; Coagulation bath is the mixed solution of ethyl acetate and dichloromethane (both volume ratios are 60 : 1), the external heating temperature when receiving the wire is 200 ℃.

[0037] (2) Put the graphene oxide fiber in a high-temperature furnace for heating and reduction at a temperature of 2500° C. After heating for 1 hour, a graphene fiber with a diameter of 20 microns is obtained.

[0038] (3) Graphene fiber is fixed on the negative electrode of electroplating tank and carri...

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Abstract

The invention discloses a graphene-silver composite fiber and a preparation method thereof. The method comprises the steps of firstly preparing a graphene oxide fiber of which the diameter is 1-50 microns by adopting a wet spinning method, and then putting the graphene oxide fiber into a high-temperature furnace for heating and reducing to obtain a continuous pure graphene fiber. Due to a special treatment mode, the fiber surface is provided with multi-stage wrinkles, the pure graphene fiber is fixed on a negative electrode of a plating bath for electroplating, and a copper layer has an extension structure embedded into the wrinkles. Graphene is tightly combined with silver crystals, a hole defect is avoided, the electrical properties of the material are greatly improved, and the fiber is stable in structure and constant in electric conductivity after being bent for 100 times.

Description

technical field [0001] The invention relates to a novel graphene metal composite material, in particular to a graphene-silver composite fiber and a preparation method thereof. Background technique [0002] Metal silver has a wide range of application potentials in decorative materials, energy industry, and medicine. Compared with other metal materials, it shows better calenderability, antibacterial properties and high conductivity. However, the price of silver is relatively expensive. In order to ensure the practicability of silver and reduce costs, one of the methods commonly used at present is to make composite materials with relatively flexible and conductive carbon materials, such as graphite and carbon nanotubes. It has good flexibility, so the composite material made will not significantly affect its processing performance and use performance while reducing the cost. [0003] Compared with graphite and carbon nanotubes, graphene has better electrical conductivity and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/83D01F9/12D01F1/09D06M101/40
Inventor 高超方波
Owner 杭州德烯科技集团有限公司
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