A carbon fiber surface chemically grafted nano-sio 2 Reinforced polyether ether ketone composite material and preparation method thereof
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
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[0038] Chemically grafted nano SiO on the surface of carbon fiber of the present invention 2 The preparation method of reinforced polyether ether ketone composite material includes 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 perform ultrasonic oxidation treatment on the carbon fiber at a temperature of 60°C for 1 hour , The treated carbon fiber is washed with distilled water for several times until it is neutral, 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 conducive to the next chemical grafting reaction.
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Embodiment 1
[0053] A kind of carbon fiber surface chemically grafted nano SiO 2 The preparation method of reinforced PEEK composite material, the specific steps are as follows:
[0054] (1) Carbon fiber pretreatment: Take 20g of carbon fiber and reflux for 48h in a 1:1 volume ratio of ethanol and acetone to remove the sizing agent on the surface of the carbon fiber. After cleaning and drying, use concentrated nitric acid to ultrasonically oxidize the carbon fiber at 60°C for 1 hour. The carbon fiber after the reaction is washed with distilled water several times until it is neutral, and dried at 150°C to a constant weight for later use.
[0055] (2) Carbon fiber activation treatment: ultrasonically disperse γ-glycidoxypropyltrimethoxysilane in absolute ethanol, and prepare γ-glycidoxypropyltrimethoxysilane absolute ethanol with a mass concentration of 3% Solution. Then add the carbon fiber treated with concentrated nitric acid, react with magnetic stirring at 100℃ for 3h, use absolute ethano...
Embodiment 2
[0063] A kind of carbon fiber surface chemically grafted nano SiO 2 The preparation method of reinforced PEEK composite material, the specific steps are as follows:
[0064] (1) Carbon fiber pretreatment: Take 20g of carbon fiber and reflux for 48h in a 1:1 volume ratio of ethanol and acetone to remove the sizing agent on the surface of the carbon fiber. After cleaning and drying, use concentrated nitric acid to ultrasonically oxidize the carbon fiber at 60°C for 1 hour. The carbon fiber after the reaction is washed with distilled water several times until it is neutral, and dried at 150°C to a constant weight for later use.
[0065] (2) Carbon fiber activation treatment: ultrasonically disperse γ-glycidoxypropyltrimethoxysilane in absolute ethanol, and prepare γ-glycidoxypropyltrimethoxysilane absolute ethanol with a mass concentration of 3% Solution. Then add the carbon fiber treated with concentrated nitric acid, react with magnetic stirring at 100℃ for 3h, use absolute ethano...
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