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Method of controllable growth of graphene covering film on surface of copper plated steel fiber

A copper-coated steel fiber and graphene-coated technology, applied in gaseous chemical plating, coating, metal material coating process and other directions, can solve the problems of easy cracking, low tensile strength, low flexural strength, high brittleness, etc. Achieve the effect of improving strength and corrosion resistance, improving corrosion resistance, strength and toughness

Inactive Publication Date: 2017-07-07
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally, cement-based materials are brittle materials, which have low tensile and flexural strength, high brittleness, and are easy to crack

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] B. Preparation of copper-coated steel fiber surface graphene:

[0022] Suspend the dry copper-plated steel fiber into the quartz tube, turn on the vacuum pump to reduce the vacuum to 5-15Pa, and then backfill it with argon to normal pressure. After setting the heating program, start heating. The heating process is divided into the following four consecutive stages:

[0023] 1) The starting temperature of the heating stage is room temperature, the heating rate is 10°C / min, the ending temperature is 900-1050°C, and the flow rates of argon and hydrogen are 100-200 sccm and 20-50 sccm respectively.

[0024] 2) The temperature in the annealing stage is 900-1050° C., the time is 20-30 minutes, and the flow rates of argon and hydrogen are 100-200 sccm and 20-50 sccm respectively.

[0025] 3) The temperature in the growth stage is 900-1050°C, the time is 10-20min, and the flow rates of argon, hydrogen, and methane are 200-300sccm, 40-100sccm, and 4-10sccm, respectively.

[0...

Embodiment approach 1

[0029] 1) Put the copper-plated steel fiber into an acetone beaker filled with 5-20ml and ultrasonically clean it for 5-15min, then pick up the copper-plated steel fiber from the acetone and put it into ethanol for ultrasonic cleaning for 5-15min, and clean the copper-plated steel fiber Pick it up and put it into deionized water for ultrasonic cleaning for 10-20min, and finally dry it with nitrogen gas for later use.

[0030] 2) Put the dried copper-coated steel fiber into the quartz boat, then load the copper-coated steel fiber and the quartz boat into the quartz tube of the gas-intake deposition system, then seal the quartz tube with a flange, and then turn on the vacuum pump to put the quartz tube into the Vacuum to 5-15Pa, and finally use argon to backfill the quartz tube to normal pressure.

[0031] 3) The heating process starts after the quartz tube is backfilled to normal pressure. First, the quartz tube was heated to 900°C at a heating rate of 10°C / min, and the flow r...

Embodiment approach 2

[0036] 1). Same as step 1) of Embodiment 1.

[0037] 2). Same as step 2) of Embodiment 1.

[0038] 3). The heating process starts after the quartz tube is backfilled to normal pressure. First, the quartz tube was heated to 1000°C at a heating rate of 10°C / min, and the flows of argon and hydrogen were kept at 150sccm and 30sccm, respectively.

[0039] 4). After the temperature reaches 1000°C, start the annealing process and keep for 24 minutes to complete the annealing process to remove oxides on the surface of the copper-coated steel fiber. During the annealing process, the flow rates of argon and hydrogen are 150 sccm and 30 sccm respectively.

[0040] 5). After the annealing process ends, the growth process starts. During the growth process, the temperature was kept constant at 1000°C, the growth time was 14 min, and the gas flow rates of argon, hydrogen, and methane were 240 sccm, 50 sccm, and 5 sccm during the growth process, respectively.

[0041] 6). After the growth ...

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Abstract

The invention provides a method of controllable growth of a graphene covering film on the surface of a copper plated steel fiber.The method mainly comprises the following technical steps: 1) cleaning the copper plated steel fiber, 2) performing high-temperature annealing treatment on the copper plated steel fiber, 3) adjusting a chemical vapor deposition technical parameter and a position of the copper plated steel fiber, and 4) growing graphene on the surface of the copper plated steel fiber to form uniform covering and controllable thickness graphene film.The technical flow is simple and easy to operate; the graphene on the surface of the copper plated steel fiber is stable in chemical property; the strength and corrosion resistance of the copper plated steel fiber in a cement-based composite can be effectively improved; the copper plated steel fiber can serve as a nucleation point of cement hydration reaction so as to profitably promote the cement hydration reaction; cement forms a dense structure; finally, crack formation is effectively avoided; and the strength of the cement-based composite is improved.The method has a wide application prospect in the field of the cement-based composite.

Description

technical field [0001] The invention relates to a method for controllably growing a graphene coating film on the surface of a copper-plated steel fiber, and belongs to the technical field of material chemical preparation. Background technique [0002] Graphene is a carbon atom with sp 2 The two-dimensional nanomaterial with honeycomb crystal structure formed by hybridization has excellent mechanical, electrical, optical and thermal properties due to its unique lattice structure. Graphene has broad application prospects in field-effect transistors, high-frequency electronic devices, transparent conductive films, composite materials, energy storage materials, and electrochemical sensors. [0003] At present, the methods for preparing graphene mainly include micromechanical exfoliation method, SiC epitaxial growth method, redox method and chemical vapor deposition method. The chemical vapor deposition method mainly uses copper foil to catalyze the cracking of carbon source un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/48C23C16/26C04B20/02
CPCC04B14/48C04B20/023C23C16/26
Inventor 郭新立葛创陈衡祝龙陈忠涛赵丽刘园园孙伟
Owner SOUTHEAST UNIV
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