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Method for preparing carbon fiber surface zinc coat

A carbon fiber and coating technology, which is applied in the field of material technology preparation, can solve problems such as difficult large-scale production, high control process requirements, and carbon fiber surface damage, etc., to improve interface wettability and compatibility, not easy to fall off, thickness controllable effect

Inactive Publication Date: 2008-08-06
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] After searching the literature of the prior art, it was found that Dong Xingguang et al. published "High Temperature Oxidation of Radio Frequency Coated Fibers" in "Fiber Composite Materials" (2005, 03, pp. 28-31). Anti-oxidation coating on the surface, the specific method is: heating the carbon fiber by radio frequency at 700-800°C for chemical vapor deposition, this method is easy to cause damage to the surface of the carbon fiber, and the control process of the preparation process requires high requirements, complex equipment, and is not easy for large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0012] Example 1: The components of the electroplating solution and their mass percentages are: 10% zinc sulfate, 0.5% ammonium chloride, 1% aluminum sulfate, 0.5% boric acid, 0.5% dextrin, and the balance is H 2 O.

[0013] Pour zinc sulfate, ammonium chloride, aluminum sulfate, and boric acid into the tank according to the above electroplating solution components and their mass percentages, add 1 / 2 of the total volume of hot water to stir and dissolve, dilute to the total volume, and soak the dextrin in cold water first After 1 hour, heat to 80°C and stir to dissolve, add to the tank and stir evenly, adjust the pH value to 3.6, and prepare the acidic plating solution. Carbon fiber is produced by Jilin Carbon Plant, with a diameter of 6-8 μm, and each bundle of carbon fiber has 1000 monofilaments.

[0014] The carbon fiber bundles were soaked in acetone for 2 minutes, rinsed with deionized water and dried, then impregnated with the above-mentioned plating solution for 5 minu...

example 2

[0016] Example 2: Carbon fiber is the same as Example 1.

[0017] The components of the electroplating solution and their mass percentages are: 25% zinc sulfate, 3% ammonium chloride, 3% aluminum sulfate, 1% boric acid, 1% dextrin, and the balance is H 2 O.

[0018] Pour zinc sulfate, ammonium chloride, aluminum sulfate, and boric acid into the tank according to the above electroplating solution components and their mass percentages, add 1 / 2 of the total volume of hot water to stir and dissolve, dilute to the total volume, and soak the dextrin in cold water first After 1 hour, heat to 80°C and stir to dissolve, add to the tank and stir evenly, adjust the pH value to 4, and prepare the acidic plating solution.

[0019] The carbon fiber bundles were soaked in acetone for 2 minutes, rinsed with deionized water and dried, then impregnated with the above-mentioned plating solution for 10 minutes, and the impregnation process adopted 40kHz ultrasonic vibration. At room temperature...

example 3

[0021] Example 3: Carbon fiber is the same as Example 1.

[0022] The components of the electroplating solution and their mass percentages are: 40% zinc sulfate, 4% ammonium chloride, 5% aluminum sulfate, 3% boric acid, 3% dextrin, and the balance is H 2 O.

[0023] Pour zinc sulfate, ammonium chloride, aluminum sulfate, and boric acid into the tank according to the above electroplating solution components and their mass percentages, add 1 / 2 of the total volume of hot water to stir and dissolve, dilute to the total volume, and soak the dextrin in cold water first After 1 hour, heat to 70°C and stir to dissolve, add to the tank and stir evenly, adjust the pH value to 4.5, and prepare the acidic plating solution.

[0024] The carbon fiber bundles were soaked in acetone for 2 minutes, rinsed with deionized water and dried, then impregnated with the above plating solution for 15 minutes. The impregnation process used 40kHz ultrasonic vibration. At room temperature, the fiber bun...

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Abstract

A method for preparing zinc coating of carbon fiber surface belongs to the material technology field, the method adopts zinc sulfate as main salt, ammonium chloride as electric salt, aluminum sulfate and boric acid as buffering agent, dextrin as dispersing agent and H2O as solvent preparation acidic electroplating solution, the components and the percentage by weight of the electroplating solution are that: the zinc sulfate is 10%-40%, the ammonium chloride is 0.5%-40%, the aluminum sulfate is 1%-5%, the boric acid is 0.5%-3%, the dextrin is 0.5%-3%, the other is H2O. The method comprises the following steps: soaking the treated carbon fiber by the obtained acidic electroplating solution, then electrifying and electroplating the carbon fiber and forming the zinc coating, the thickness of the prepared coating is 2-7mu.m, the coating is plane, homogeneous and uneasy to be peeled off, the carbon fiber of the invention keeps the directionality and configuration as one aspect, simultaneously, the invention improves the soakage of the carbon fiber with basal body in composite material as the other aspect.

Description

technical field [0001] The invention relates to a preparation method in the technical field of materials, in particular to a preparation method of a zinc coating on the surface of carbon fibers. Background technique [0002] Carbon fiber has the advantages of high specific strength, high specific elastic modulus, and low density, and is often used as a reinforcing material in metal matrix and polymer matrix composites. However, the wettability between carbon fiber and the matrix is ​​not good, and it is difficult to form a dense composite material with excellent performance. Therefore, its application in fields requiring lightweight, high-strength, high-modulus materials is hindered. Forming a dense coating on carbon fibers can effectively solve the above problems. Coating preparation methods include chemical vapor deposition, physical vapor deposition, sol-gel impregnation sintering and electrochemical methods. Among them, the electrogalvanizing method in the electrochem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22
Inventor 王浩伟鲁鹏夏存娟李险峰马乃恒
Owner SHANGHAI JIAO TONG UNIV
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