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Preparation method of carbon fiber/rare earth oxide nanowire mixed reinforcement, as well as obtained material and application of carbon fiber/rare earth oxide nanowire mixed reinforcement

A rare earth oxide and carbon fiber preform technology, applied in the direction of rare earth metal oxide/hydroxide, carbon fiber, lanthanide oxide/hydroxide, etc. Weak carbon fiber bonding, environmental pollution and other problems, to achieve the effect of improving the interface bonding and mechanical properties, the preparation process is simple and controllable, and the reaction temperature is low

Inactive Publication Date: 2021-12-28
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The rare earth compounds disclosed in the above documents are in the form of particles, and do not involve the use of rare earth oxide nanowires and carbon fibers to form a cross-scale hybrid reinforcement, and the combination of particles and carbon fibers is weak and easy to fall off, so the reinforcement effect on the interface and matrix of composite materials is limited.
In addition, ethanol, ammonium chloride, nitric acid and other solvents are used in the preparation method, which is costly and pollutes the environment.

Method used

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  • Preparation method of carbon fiber/rare earth oxide nanowire mixed reinforcement, as well as obtained material and application of carbon fiber/rare earth oxide nanowire mixed reinforcement
  • Preparation method of carbon fiber/rare earth oxide nanowire mixed reinforcement, as well as obtained material and application of carbon fiber/rare earth oxide nanowire mixed reinforcement
  • Preparation method of carbon fiber/rare earth oxide nanowire mixed reinforcement, as well as obtained material and application of carbon fiber/rare earth oxide nanowire mixed reinforcement

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preparation example Construction

[0032] A method for preparing a carbon fiber / rare earth oxide nanowire mixed reinforcement, specifically comprising the following steps:

[0033] 1) Put the carbon fiber prefabricated body in an atmosphere protection furnace and heat-treat it at 500-1000°C for 2-5 hours, then clean it with deionized water by ultrasonic vibration, and dry it at 80-120°C for later use.

[0034] 2) Prepare the dry rare earth salt into an aqueous solution, add a surfactant dropwise, stir with a magnetic stirrer at 30-50°C for 30 minutes, and at the same time add a sodium hydroxide solution dropwise to adjust the pH value to 10-13 to obtain a reaction solution, wherein The concentration of rare earth ions is 0.1-0.6 mol / L, the concentration of active agent is 0.05-0.15 mol / L, and the concentration ratio of rare earth ions to sodium hydroxide is 1:2-1:5.

[0035] 3) Put the reaction solution and the treated carbon fiber prefabricated body in the reaction kettle, perform in-situ synthesis of rare ear...

Embodiment 1

[0040] A method for preparing a carbon fiber / rare earth oxide nanowire mixed reinforcement, comprising the following steps:

[0041] 1) Arrange the carbon fiber in a vacuum atmosphere protection furnace and heat-treat it at 500°C for 5 hours, then wash it with deionized water and ultrasonic vibration, and dry it at 80°C for later use.

[0042] 2) Prepare dry cerium chloride into an aqueous solution, add cetyltrimethylammonium bromide dropwise, stir with a magnetic stirrer for 30 minutes at 30°C, and simultaneously add sodium hydroxide solution dropwise to adjust the pH value to 10 to obtain The reaction solution, wherein the concentration of cerium ions is 0.1mol / L, the concentration of cetyltrimethylammonium bromide is 0.05mol / L, and the concentration ratio of cerium to sodium hydroxide is 1:2.

[0043] 3) Arrange the reaction liquid and the treated carbon fiber in the reaction kettle, perform in-situ synthesis of cerium oxide nanowires after ultrasonic oscillation for 30 min...

Embodiment 2

[0047] A method for preparing a carbon fiber / rare earth oxide nanowire mixed reinforcement, comprising the following steps:

[0048] 1) Set the density to 0.20g / cm 3 The carbon fiber integral felt was placed in an atmosphere protection furnace and heat-treated at 700 °C for 4 hours, then cleaned with deionized water ultrasonic vibration, and dried at 90 °C for use.

[0049] 2) Prepare the dry lanthanum chloride into an aqueous solution, add ethylene glycol dropwise, stir with a magnetic stirrer at 40°C for 30 minutes, and at the same time add sodium hydroxide solution dropwise to adjust the pH value to 11 to obtain a reaction solution, in which the concentration of lanthanum ions The concentration of ethylene glycol is 0.3mol / L, the concentration of ethylene glycol is 0.1mol / L, and the concentration ratio of cerium to sodium hydroxide is 1:3.

[0050] 3) Put the reaction solution and the treated carbon fiber integral felt in the reaction kettle, perform in-situ synthesis of l...

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Abstract

The invention belongs to the technical field of composite materials, and particularly relates to a preparation method of a carbon fiber / rare earth oxide nanowire mixed reinforcement, as well as an obtained material and application of the carbon fiber / rare earth oxide nanowire mixed reinforcement. The preparation method comprises the following steps of placing a carbon fiber preform in a rare earth salt reaction solution, magnetically stirring, performing high-temperature and high-pressure in-situ synthesis reaction, cleaning, drying and calcining to obtain the carbon fiber / rare earth oxide nanowire mixed reinforcement. According to the preparation method provided by the invention, reagents which are high in cost and pollute the environment are not used, the preparation process is simple and controllable, the reaction temperature is low, and the composition, the content and the like of rare earth oxide nanowires can be controlled through design of the reaction solution proportion and reaction conditions; and the mixed reinforcement prepared by the preparation method disclosed by the invention can give consideration to the cross-scale synergistic reinforcement advantage of carbon fibers and nanowires on an interface and a matrix and the modification effect of rare earth on the surface of the carbon fibers, and can be used for reinforcing polymers, carbon and ceramic-based composite materials.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of a carbon fiber / rare earth oxide nanowire mixed reinforcement and the obtained material and application thereof. Background technique [0002] Due to the characteristics of high specific strength and specific modulus, small thermal expansion coefficient, and excellent high-temperature mechanical properties, carbon fibers are widely used as reinforcements for polymer-based, carbon-based, and ceramic-based composites. However, the chemical inertness of the surface of carbon fibers leads to weak interfacial bonding with the substrate, especially when reinforcing carbon and ceramic substrates prepared at high temperature, the functional groups for surface modification are eliminated, and the interfacial bonding depends on mechanical engagement, and the interlayer strength is low, which limits Composite reinforcement potential and overall...

Claims

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Application Information

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IPC IPC(8): D06M11/45D06M11/74C08K9/02C08K7/06C08J5/06C01F17/235C01F17/229C01F17/206C04B35/80C04B35/83D06M101/40
CPCD06M11/45D06M11/74C08J5/06C01F17/235C01F17/229C01F17/206C04B35/80C04B35/83D06M2101/40C08K9/02C08K7/06C01P2004/16C01P2004/80C01P2002/72C01P2004/04C01P2004/03C04B2235/522
Inventor 邓海亮李嘉庆陈子洋白志云史雨程万梓涵郑军
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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