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Method for preparing carbon fiber surface densified sintering TiO2 coating

A carbon fiber and densification technology, applied in the field of materials, can solve the problems of high temperature anti-oxidation performance discount, and achieve the effect of improving high-temperature anti-oxidation performance and avoiding interface reactions

Inactive Publication Date: 2013-07-03
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the titanium dioxide coating prepared by the above method belongs to the accumulation of tiny particles microscopically, and the formed coating is actually porous, and oxygen molecules can easily enter the surface of the carbon fiber through the micropores, resulting in a discount on high-temperature oxidation resistance.

Method used

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  • Method for preparing carbon fiber surface densified sintering TiO2 coating
  • Method for preparing carbon fiber surface densified sintering TiO2 coating
  • Method for preparing carbon fiber surface densified sintering TiO2 coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: figure 1 As shown, the carbon fiber surface densified and sintered TiO 2 The process steps of the coating method are described below.

[0025] (1) Soak carbon fibers (Lanzhou Carbon Plant, fiber diameter 10 μm) in acetone for 1 hour, rinse with deionized water, and dry at 80°C to obtain pretreated carbon fibers;

[0026] (2) Take 10mL of tetrabutyl titanate and 60mL of ethanol and mix them evenly to obtain a titanium source solution;

[0027] (3) Take 10mL of water, 60mL of ethanol and 0.5g of copper sulfate (5.18% of the mass of tetrabutyl titanate) and mix evenly, add acetic acid to adjust the pH of the solution to 2.5; then slowly drop it into the titanium source solution under stirring to obtain Precursor solution;

[0028] (4) Immerse the pretreated carbon fiber in the precursor solution for 0.5h under vacuum conditions, take out the carbon fiber, centrifuge to remove the excess precursor solution on the surface of the carbon fiber, and then dry it at...

Embodiment 2

[0031] Example 2: Densified and sintered TiO on the surface of the carbon fiber 2 The process steps of the coating method are described below.

[0032] (1) Take carbon fiber (Lanzhou Carbon Factory, fiber diameter 10μm,) and treat it with gas phase oxidation method to obtain pretreated carbon fiber;

[0033] (2) Take 10mL of tetraethyl titanate and 40mL of ethanol and mix evenly to obtain a titanium source solution;

[0034](3) Take 10mL of water, 30mL of butanol, 30mL of isopropanol and 0.2g of cobalt sulfate (1.8% of the mass of tetraethyl titanate) and mix evenly, add formic acid to adjust the pH of the solution to 2; then slowly drop it into In the titanium source solution, a precursor solution is obtained;

[0035] (4) Immerse the pretreated carbon fiber in the precursor solution for 60 minutes under vacuum conditions, take out the carbon fiber, centrifuge to remove the excess precursor solution on the surface of the carbon fiber, and then dry it at 100°C for 2 hours; r...

Embodiment 3

[0038] Example 3: Densified and sintered TiO on the surface of the carbon fiber 2 The process steps of the coating method are described below.

[0039] (1) Soak carbon fibers (TORAY, T-300B, Japan) in dilute nitric acid for 1 hour, rinse with deionized water, and dry at 80°C to obtain pretreated carbon fibers;

[0040] (2) Mix 10 mL of tetrabutyl titanate and 40 mL of methanol evenly to obtain a titanium source solution;

[0041] (3) Take 8mL of water, 20mL of methanol and 1g of sodium sulfate (10.35% of the mass of tetrabutyl titanate) and mix evenly, add acetic acid to adjust the pH of the solution to 3; then slowly drop it into the titanium source solution under stirring to obtain the precursor body solution;

[0042] (4) Immerse the pretreated carbon fiber in the precursor solution for 0.5 h under ultrasonic oscillation, take out the carbon fiber, mechanically squeeze to remove the excess precursor solution on the surface of the carbon fiber, and then dry it at 100°C for...

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Abstract

The invention discloses a method for preparing carbon fiber surface densified sintering TiO2 coating. The method takes titanate as a titanium source, an alcohol solution as a solvent, low melting point salt as an sintering aid, and organic acid as an chelating agent and a pH value regulator, and comprises the following steps: firstly, a precursor solution containing the sintering aid is obtained through hydrolysis, and then carbon fibers are dipped, dried, and sintered to obtain densified carbon fiber surface TiO2 coating. The method uses the low melting point salt as a fluxing agent which is converted into a liquid phase wet solid, penetrates between solid particles, dissolves sintering keys, and induces titanium dioxide particles to be rearranged, thereby achieving the effect of densifying the coating. The densified sintering TiO2 coating carbon fiber prepared by the method has the flexibility and stitchability of carbon fibers, simultaneously improves the high-temperature oxidation resistance performance of the carbon fibers, and avoids the interface reaction between the carbon fibers and a composite material matrix.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a carbon fiber surface densified sintered TiO 2 Coating method. Background technique [0002] Carbon fiber is a fiber polymer whose decomposition temperature is lower than the melting temperature. It is produced by solid-state pyrolysis at 1000-3000°C under an inert atmosphere, and is an inorganic material with a final carbon content of more than 90%. According to different raw material systems, carbon fiber is mainly divided into three types: viscose-based carbon fiber, polyacrylonitrile-based (PAN-based) carbon fiber and pitch-based carbon fiber. Carbon fiber has high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, electrical conductivity, heat transfer, and low density (1.76g / cm 3 ) and a series of excellent properties such as low thermal expansion coefficient, it is widely used in carbon fiber reinfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/46D06M101/40
Inventor 胡永其余海鹏王勇赵瑞红李飞龙张文娇张兆翔
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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