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Reinforced poly-ether-ether-ketone composite material with nano SiO2 chemically grafted to surfaces of carbon fibers and preparation method of material

A technology of surface chemistry and polyether ether ketone, applied in the field of material science, can solve problems affecting the excellent performance of composite materials, poor interfacial bonding strength, and few active functional groups, so as to improve mechanical and tribological properties, small size effect, and large The effect of specific surface area

Active Publication Date: 2019-05-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the smooth surface of carbon fiber, few active functional groups, and low surface energy, the interfacial bonding strength between carbon fiber and resin matrix without surface treatment is poor, which affects the overall excellent performance of the composite material.

Method used

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  • Reinforced poly-ether-ether-ketone composite material with nano SiO2 chemically grafted to surfaces of carbon fibers and preparation method of material

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preparation example Construction

[0038] A carbon fiber surface chemically grafted nano-SiO of the present invention 2 A method for preparing a reinforced polyether ether ketone composite material, comprising the following steps:

[0039] (1) Carbon fiber pretreatment: reflux the carbon fiber in a mixed solution of ethanol and acetone for 48 hours to remove the sizing agent on the surface of the carbon fiber; then wash and dry, and use concentrated nitric acid to ultrasonically oxidize the carbon fiber for 1 hour at a temperature of 60°C , the treated carbon fiber is washed with distilled water several times to neutrality, and dried at a temperature of 150° C. to a constant weight for later use; wherein, the volume ratio of ethanol to acetone in the ethanol and acetone solution is 1:1. The purpose of carbon fiber acid treatment is to introduce active functional groups such as hydroxyl and carboxyl groups on its surface, which is beneficial to the next step of chemical grafting reaction.

[0040] (2) Carbon fi...

Embodiment 1

[0053] A carbon fiber surface chemically grafted nano-SiO 2 Reinforced PEEK composite material preparation method, the specific steps are as follows:

[0054] (1) Carbon fiber pretreatment: Take 20 g of carbon fiber and reflux for 48 hours in a mixed solution of ethanol and acetone with a volume ratio of 1:1 to remove the sizing agent on the surface of the carbon fiber. After washing and drying, the carbon fibers were ultrasonically oxidized at 60 °C for 1 h using concentrated nitric acid. After the reaction, the carbon fiber was washed several times with distilled water to neutrality, and dried at 150°C to constant weight for later use.

[0055] (2) Carbon fiber activation treatment: ultrasonically disperse γ-glycidyl etheroxypropyl trimethoxysilane in absolute ethanol to prepare γ-glycidyl etheroxypropyltrimethoxysilane absolute alcohol with a mass concentration of 3%. solution. Then add the carbon fibers treated with concentrated nitric acid, and react with magnetic stir...

Embodiment 2

[0063] A carbon fiber surface chemically grafted nano-SiO 2 Reinforced PEEK composite material preparation method, the specific steps are as follows:

[0064] (1) Carbon fiber pretreatment: Take 20 g of carbon fiber and reflux for 48 hours in a mixed solution of ethanol and acetone with a volume ratio of 1:1 to remove the sizing agent on the surface of the carbon fiber. After washing and drying, the carbon fibers were ultrasonically oxidized at 60 °C for 1 h using concentrated nitric acid. After the reaction, the carbon fiber was washed several times with distilled water to neutrality, and dried at 150°C to constant weight for later use.

[0065] (2) Carbon fiber activation treatment: ultrasonically disperse γ-glycidyl etheroxypropyl trimethoxysilane in absolute ethanol to prepare γ-glycidyl etheroxypropyltrimethoxysilane absolute alcohol with a mass concentration of 3%. solution. Then add the carbon fibers treated with concentrated nitric acid, and react with magnetic stir...

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Abstract

The invention discloses a reinforced poly-ether-ether-ketone composite material with nano SiO2 chemically grafted to the surfaces of carbon fibers and a preparation method of material. The composite material is prepared from, by weight, 65-100 parts of poly-ether-ether-ketone, 5-30 parts of the carbon fibers, 0-10 parts of the nano SiO2, 0.5-3 parts of gamma-aminopropyl triethoxysilane and 0.5-3 parts of gamma-glycidyl ether oxypropyl trimethoxysilane. According to the composite material, modified carbon fibers are obtained by chemically grafting the nano SiO2 to the surfaces of the carbon fibers, so that the interface bonding performance between the carbon fibers and matrix resin is improved. Meanwhile, the modified carbon fibers are added into PEEK matrix as a reinforcing filler to improve the mechanical performance and wear resistance of PEEK and reduce the friction coefficient and wear rate of the material so that the modified-carbon-fiber-reinforced PEEK-based composite material can be applicable to extreme working conditions such as high speed, heavy loads and oil-free lubrication.

Description

technical field [0001] The invention relates to the field of material science, in particular to a modified carbon fiber reinforced polyether ether ketone composite material and a preparation method thereof. Background technique [0002] Polyetheretherketone (poly-ether-ether-ketone, PEEK) is a semi-crystalline aromatic thermoplastic special engineering plastic composed of repeating units containing one ketone bond and two ether bonds in the macromolecular main chain structure. Because PEEK has excellent comprehensive properties such as good mechanical properties, high temperature resistance, wear resistance, and flame retardancy, it can replace traditional materials such as metals and ceramics in many fields and is widely used in aerospace, automobile industry, mechanical medicine and other fields. However, with the rapid development of science and technology, the requirements for the performance of special engineering plastics used in these fields are getting higher and hig...

Claims

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Application Information

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IPC IPC(8): C08L61/16C08K9/02C08K9/06C08K7/06C08J5/06
Inventor 苏新清刘后宝傅仁利游超群李国郡陈旭东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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