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Method for improving oxidation resistance of carbon fibers

A carbon fiber, oxidation-resistant technology, applied in the direction of carbon fiber, fiber treatment, ultrasonic/sonic fiber treatment, etc., can solve the problems of poor firmness of epoxy resin coating, no oxidation resistance, harsh reaction conditions, etc., to achieve anti-oxidation performance, easy control of the deposition process, evenly distributed effect

Inactive Publication Date: 2017-02-22
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is similar to forming a polymer coating on the surface of carbon fiber, but the epoxy resin coating has poor firmness on the surface of the material, and does not have oxidation resistance under high temperature conditions, and the equipment requirements are high, the reaction conditions are harsh, and the coating is easy to fall off.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Put the carbon fiber in methanol with a bath ratio of 1:50, then place the container containing the carbon fiber and methanol in an ultrasonic cleaner for ultrasonic cleaning for 4 hours to remove the adhesive layer and its attachments on the surface of the carbon fiber, and use the carbon fiber after cleaning Blow dry with compressed nitrogen. The cleaned carbon fibers were treated with low-temperature corona irradiation for 5 minutes to obtain activated carbon fibers. The temperature of low-temperature corona irradiation was 10°C, the voltage of low-temperature corona irradiation was 6KV, and the distance of low-temperature corona irradiation was 0.5cm, and then put the activated carbon fiber into the reaction chamber of the atomic layer deposition equipment with a temperature of 80°C, and purging with nitrogen gas with a purity of 99.999% for 25min, wherein the nitrogen flow rate is 50sccm, and then the carbon fiber with a purity of 1.0M The trimethylaluminum / heptane...

Embodiment 2

[0023] Put the carbon fiber in ethanol with a bath ratio of 1:75, then place the container containing carbon fiber and ethanol in an ultrasonic cleaner for ultrasonic cleaning for 2 hours to remove the adhesive layer and its attachments on the surface of the carbon fiber, and use the carbon fiber after cleaning Blow dry with compressed nitrogen. The cleaned carbon fibers were treated with low-temperature corona irradiation for 7 minutes to obtain activated carbon fibers. The temperature of low-temperature corona irradiation was 20°C, the voltage of low-temperature corona irradiation was 8KV, and the distance of low-temperature corona irradiation was 1.0 cm, and then put the activated carbon fiber into the reaction chamber of the atomic layer deposition equipment with a temperature of 150 ° C, and purging with nitrogen gas with a purity of 99.999% for 30 min, wherein the nitrogen flow rate is 100 sccm, and then the carbon fiber with a purity of 1.0M The trimethylaluminum / heptan...

Embodiment 3

[0025]Place the carbon fiber in hexafluoroisopropanol with a bath ratio of 1:80, then place the container containing the carbon fiber and hexafluoroisopropanol in an ultrasonic cleaner for ultrasonic cleaning for 2 hours to remove the adhesive layer on the surface of the carbon fiber and its Attachments, the cleaned carbon fibers were blown dry with compressed nitrogen. The cleaned carbon fibers were treated with low-temperature corona irradiation for 7 minutes to obtain activated carbon fibers. The temperature of low-temperature corona irradiation was 20°C, the voltage of low-temperature corona irradiation was 8KV, and the distance of low-temperature corona irradiation was 1.0 cm, and then put the activated carbon fiber into the reaction chamber of the atomic layer deposition equipment with a temperature of 150 ° C, and purging with nitrogen gas with a purity of 99.999% for 30 min, wherein the nitrogen flow rate is 80 sccm, and then the carbon fiber with a purity of 1.0M The ...

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Abstract

The invention relates to a method for improving the oxidation resistance of carbon fibers, belonging to the technical field of composite materials. According to the method, aluminum-base functional nano-particles are bonded to the surfaces of the carbon fibers through chemical bonds by virtue of an atomic layer deposition technique so as to form uniform and dense nanometer functional films on the surfaces of the carbon fibers, and the aluminum-base functional nano-films formed on the surfaces of the carbon fibers are uniformly distributed, good in shape maintenance property and controllable in thickness and have relatively good lasting stability, so that the thermal oxidation performance and mechanical stability of the carbon fibers can be effectively improved. An operation method adopted in the improvement of the oxidation resistance of the carbon fibers is simple, a sedimentation process is easy to control, the cost and the energy consumption are low, and the ecological environment is not polluted, so that the method is applicable to the industrial production.

Description

technical field [0001] The invention relates to a method for improving the oxidation resistance of carbon fibers, which belongs to the technical field of composite materials. Background technique [0002] Carbon fiber has excellent properties such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, and fatigue resistance, and can be used as both a structural material and a functional material. Carbon fiber and its fabric not only have the inherent intrinsic characteristics of carbon materials, but also have the softness and processability of textile fibers. However, carbon fibers and their fabrics are easily oxidized in a high-temperature aerobic environment and lose their intrinsic properties, which severely limits their application as high-temperature structural materials. Chinese patent application number CN201610514672.3, dated July 4, 2016, titled "Preparation Method for Anti-Oxidation Carbon Fiber Thermal Insulation Bla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/02D06M11/83D06M101/40
CPCD06M10/025D06M11/83D06M2101/40
Inventor 陈凤翔杨辉宇徐卫林刘欣
Owner WUHAN TEXTILE UNIV
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