Method for preparing sample band for testing carbon fiber tow

A technology of carbon fiber and fiber tow, which is applied in the field of testing and research, and can solve problems such as difficulty in adhesion

Inactive Publication Date: 2018-11-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aqueous solution of water-based epoxy resin and water-based epoxy resin curing agent is used as the impregnation solution. Before impregnation, the carbon fiber tow is pre-soaked with a phosphate-based adhesion promoter, and a certain tension is applied to the carbon fiber tow during the impregnation process. After drying and curing, the carbon fiber mechanical performance test sample is obtained, which solves the disadvantage of using acetone as a solvent in the traditional carbon fiber multifilament test sample preparation process, and solves the problem of difficult adhesion of water-based epoxy resin aqueous solution as an impregnation solution

Method used

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  • Method for preparing sample band for testing carbon fiber tow

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Configuration of water-based epoxy resin impregnation solution: add deionized water to water-based epoxy resin F0404 (solid content is 45%, epoxy equivalent value is 0.18mol / 100g, viscosity is 300cps), stir evenly, and configure Epoxy resin mass percent is the aqueous solution of 30%; Add water-based epoxy resin curing agent F0405 (solid content 50%, amine hydrogen equivalent value is 200, viscosity is 1500cps), the combination of water-based epoxy resin and water-based epoxy resin curing agent The mass ratio is 1:1; stir evenly to obtain a water-based epoxy resin impregnating solution;

[0019] (2) Fiber bundle pre-treatment: Wrap the T800 grade 12K carbon fiber tow produced by Toray Corporation of Japan on the fixed frame, apply a tension of 5N during the winding process, and soak for 3 minutes in a 1% epoxy phosphate aqueous solution with a mass ratio;

[0020] (3) Impregnation of fiber bundles: placing the fiber bundles treated in step (2) together with the fram...

Embodiment 2

[0024] (1) Configuration of water-based epoxy resin impregnation solution: add deionized water to water-based epoxy resin F0404 (solid content is 45%, epoxy equivalent value is 0.20mol / 100g, viscosity is 600cps), stir evenly, and configure Epoxy resin mass percentage is the aqueous solution of 25%; Add water-based epoxy resin curing agent F0405 (solid content 50%, amine hydrogen equivalent value is 250, and viscosity is 1500cps), the combination of water-based epoxy resin and water-based epoxy resin curing agent The mass ratio is 0.75:1, and the mixture is evenly stirred to obtain a water-based epoxy resin impregnation solution;

[0025] (2) Pre-treatment of fiber bundles: Wrap T800 grade 12K carbon fiber tows produced by Japan Toray Co., Ltd. on a fixed frame, apply a tension of 3N during the winding process, and soak for 1 minute in an aqueous solution of 2% phosphate methacrylate by mass ;

[0026] (3) Impregnation of fiber bundles: placing the fiber bundles treated in ste...

Embodiment 3

[0030] (1) (2) with embodiment 1;

[0031] (3) Impregnation of fiber bundles: placing the fiber bundles treated in step (2) together with the frame in the water-based epoxy resin impregnating solution of step (1) for 10 minutes;

[0032] (4) Curing: Take the carbon fiber tow and the frame out of the dipping solution and let it stand for 2 minutes, then put it in an oven at 130°C for drying and curing for 2 hours;

[0033] (5) Removal of fiber tows: remove the carbon fiber tows from the fixing frame with tools such as scissors.

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Abstract

The invention relates to a method for preparing a sample band for testing a carbon fiber tow. The method comprises the following steps: by taking an aqueous solution of a water-borne epoxy resin and awater-borne epoxy resin curing agent as impregnation liquid, pre-soaking the carbon fiber tow by using a phosphate adhesion promoter before impregnation, applying a certain tension to the carbon fiber tow in the impregnation process, drying, and curing, thereby obtaining the sample band for testing the mechanical property of carbon fibers. According to the method disclosed by the invention, the defect that lots of acetone serves as a solvent in the traditional process of preparing the sample band for testing the carbon fiber tow is overcome, the problem that the water-borne epoxy resin aqueous solution serving as impregnation liquid is difficult in adhesion is solved, and the method disclosed by the invention is rapid in operation, simple and feasible and has the advantages of being non-toxic, environment-friendly and the like.

Description

technical field [0001] The invention relates to a method for preparing a sample strip for carbon fiber tow testing, which belongs to the field of test research. Background technique [0002] Carbon fiber has the characteristics of high specific strength, high specific modulus, high temperature resistance, corrosion resistance, and good electrical and thermal conductivity. It is an important reinforcement of advanced composite materials and is widely used in aerospace, transportation, building energy, sports and leisure fields. . In the process of carbon fiber preparation, production and application, it is extremely important to accurately and timely characterize the mechanical properties of carbon fiber. Since carbon fiber products are tows composed of a large number of carbon fiber monofilaments, their mechanical performance tests are divided into monofilament method and bundle method. Among them, the monofilament method does not require special sample preparation before t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/30G01N1/44
CPCG01N1/286G01N1/30G01N1/44
Inventor 童元建徐樑华曹维宇李常清高爱君王宇赵振文
Owner BEIJING UNIV OF CHEM TECH
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