Method and device for preparing coating by cathode plasma electrolysis assisted by tungsten wire

A cathode plasma and plasma arc technology, applied in the direction of electrolytic inorganic material coating, electrolytic components, electrolytic process, etc., can solve the problems of high cost, uneven coating, complicated process, etc., and achieve low device cost, simple device structure, and easy The effect of the operation

Active Publication Date: 2019-05-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the complex process, high cost, and uneven coating in the preparation of carbon fiber surface protective coatings in the prior art, one of the purposes of the present invention is to provide a method for preparing coatings by tungsten wire-assisted cathodic plasma electrolysis. The method is simple in process, and can prepare uniform, continuous and dense coatings on the surface of carbon fibers, and the prepared coatings have good oxidation resistance; the second purpose of the present invention is to provide a method for preparing coatings by cathode plasma electrolysis assisted by tungsten wires. Layer device, the device is simple in structure, easy to operate, low cost, suitable for continuous treatment of carbon fiber surface by small and medium-sized enterprises

Method used

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  • Method and device for preparing coating by cathode plasma electrolysis assisted by tungsten wire

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Effect test

Embodiment 1

[0035] The specific steps for preparing coatings by tungsten wire-assisted cathodic plasma electrolysis are as follows:

[0036] (1) Aluminum nitrate is dissolved in deionized water, and an electrolyte solution 4 with a concentration of 50 g / L is prepared; the prepared electrolyte solution 4 is added to the reaction vessel 3;

[0037] (2) immerse the high-purity graphite plate as the anode electrode and the tungsten wire as the cathode electrode into the electrolytic solution 4, and place three tungsten wires respectively in three small holes 54 on the parts 5 that generate the plasma arc region; The electrode and the positive electrode are connected to the high-frequency DC power supply respectively, turn on the high-frequency DC power supply, and apply 125V voltage to the negative electrode and the positive electrode to form a stable plasma arc area;

[0038] (3) Driven by the motor 7, the pay-off machine 1 releases the carbon fibers, and the carbon fibers are introduced int...

Embodiment 2

[0041] The specific steps for preparing coatings by tungsten wire-assisted cathodic plasma electrolysis are as follows:

[0042] (1) Sodium metaaluminate is dissolved in deionized water, and an electrolyte solution 4 with a concentration of 20 g / L is prepared; the prepared electrolyte solution 4 is added to the reaction vessel 3;

[0043] (2) immerse the high-purity graphite plate as the anode electrode and the tungsten wire as the cathode electrode into the electrolytic solution 4, and place six tungsten wires respectively in six small holes 54 on the parts 5 that generate the plasma arc region; The electrode and the positive electrode are respectively connected to the high-frequency DC power supply, the high-frequency DC power supply is turned on, and a voltage of 155V is applied to the negative electrode and the positive electrode to form a stable plasma arc area;

[0044](3) Driven by the motor 7, the pay-off machine 1 releases the carbon fibers, and the carbon fibers are ...

Embodiment 3

[0047] The specific steps for preparing the coating by tungsten wire-assisted cathodic plasma electrolysis are as follows:

[0048] (1) Sodium silicate is dissolved in deionized water, and an electrolyte solution 4 with a concentration of 10 g / L is prepared; the prepared electrolyte solution 4 is added to the reaction vessel 3;

[0049] (2) Immerse the high-purity graphite plate as the anode electrode and the tungsten wire as the cathode electrode into the electrolyte 4, and place nine tungsten wires respectively in nine small holes 54 on the parts 5 that generate the plasma arc region; The cathode electrode and the anode electrode are respectively connected to the high-frequency DC power supply, and the high-frequency DC power supply is turned on, and a voltage of 180V is applied to the cathode electrode and the anode electrode to form a stable plasma arc area;

[0050] (3) Driven by the motor 7, the pay-off machine 1 releases the carbon fibers, and the carbon fibers are intr...

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Abstract

The invention relates to a method for preparing a coating through tungsten filament assisted cathode plasma electrolysis and a device for preparing the coating by adopting the method, and belongs to the technical field of carbon fiber surface modification. By adopting a tungsten filament assisted cathode plasma electrolysis technology, the purpose of depositing a layer of uniform, continuous and compact coating on carbon fiber is realized. The method has the advantages that the method is efficient and environment-friendly and is low in cost, damage to the carbon fiber is small, and continuous treatment can be realized. The device for preparing the coating is simple in structure, easy to operate and low in cost, and is suitable for small and medium-sized enterprises to carry out the continuous treatment on the surface of the carbon fiber.

Description

technical field [0001] The invention relates to a method for preparing a coating on the surface of carbon fibers, in particular to a method and a device for preparing a coating by tungsten wire-assisted cathode plasma electrolysis, and belongs to the technical field of carbon fiber surface modification. Background technique [0002] Carbon fiber is known as one of the most promising new materials in the 21st century due to its high modulus, low density, low thermal expansion coefficient and high specific strength. It has a wide range of applications in modern aerospace, sports and leisure products, civil construction, electronic products, medical equipment and other fields. However, the oxidation resistance of carbon fiber in an aerobic environment higher than 450 °C is very poor, which greatly limits its application. Therefore, how to quickly prepare a uniform and dense protective coating on the surface of continuous carbon fiber bundles has become a current research topic....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D7/06C25D9/04C25D17/10C25D17/00
CPCC25D7/0607C25D9/04C25D17/00C25D17/10
Inventor 陈为为张玉平孟阳程焕武王鲁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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