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Carbon fiber surface grafted two-dimensional network structure reinforced polyether-ether-ketone composite material and preparation method thereof

A technology of polyether ether ketone and network structure, applied in the field of carbon fiber surface grafted two-dimensional network structure reinforced polyether ether ketone composite material and its preparation, can solve the problem of destroying CF strength, limiting the degree of interface modification of composite materials, and the interaction Weakness and other problems, to achieve the effect of increasing mechanical interlocking effect, improving mechanical strength and toughness, and increasing interface bonding effect

Active Publication Date: 2021-03-09
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current research methods, there are still some shortcomings in the method of CF surface roughening: the use of strong acid oxidation and other CF surface treatment methods will destroy the strength of CF itself; The interaction between particles is weak, which limits the degree of interface modification of CF / PEEK composites

Method used

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  • Carbon fiber surface grafted two-dimensional network structure reinforced polyether-ether-ketone composite material and preparation method thereof
  • Carbon fiber surface grafted two-dimensional network structure reinforced polyether-ether-ketone composite material and preparation method thereof
  • Carbon fiber surface grafted two-dimensional network structure reinforced polyether-ether-ketone composite material and preparation method thereof

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preparation example Construction

[0029] The invention provides a preparation method of a carbon fiber surface-grafted two-dimensional network structure reinforced polyetheretherketone composite material, comprising the following steps:

[0030] Mixing carbon fiber, p-phenylenediamine, nitrite and concentrated hydrochloric acid to carry out diazotization reaction to obtain aminated carbon fiber;

[0031] Mixing the biphenyl dianhydride, the aminosilane coupling agent and the first solvent, and modifying it to obtain a modified silane coupling agent;

[0032] Mixing the dispersion of silica nanowires with the modified silane coupling agent, and performing modification, to obtain modified silica nanowires;

[0033] Mixing the modified silica nanowires, aminated graphene, aminated carbon fibers and a second solvent, and performing grafting to obtain a two-dimensional network structure grafted carbon fiber;

[0034]The two-dimensional network structure-grafted carbon fiber and polyetheretherketone are mixed, and ...

Embodiment 1

[0062] 20g of chopped carbon fiber (SCF) was added to a concentrated hydrochloric acid solution (38% by mass) containing 0.25g of p-phenylenediamine and 0.25g of sodium nitrite, and the pH value was adjusted to 1. After nitriding reaction for 8 hours, use deionized water to wash to neutrality, and vacuum dry to obtain aminated carbon fiber, which is denoted as NH 2 -CF;

[0063] Under nitrogen protection and room temperature, 0.25g of biphenyl dianhydride was dissolved in DMAc solvent. After it was dissolved, 0.25g of KH550 was added dropwise for modification for 5h. After the reaction was completed, the solvent was distilled off under reduced pressure, and anhydrous methanol was used. Washing, after multiple recrystallizations from ethanol, drying to obtain modified KH550 (g-KH550);

[0064] 0.5g SNF (silicon dioxide nanowires) was ultrasonically dispersed in ethanol for 2h, and the g-KH550 was rapidly added at 60°C for 8h, and the unreacted g-KH550 was removed by washing wi...

Embodiment 2

[0070] 20g of chopped carbon fiber (SCF) was added to a concentrated hydrochloric acid solution (38% by mass) containing 0.30g of p-phenylenediamine and 0.30g of sodium nitrite, and the pH value was adjusted to 1. After nitriding reaction for 8 hours, use deionized water to wash to neutrality, and vacuum dry to obtain aminated carbon fiber, which is denoted as NH 2 -CF;

[0071] Under nitrogen protection and room temperature, 0.30 g of biphenyl dianhydride was dissolved in DMAc solvent. After it was dissolved, 0.30 g of KH550 was added dropwise for modification for 5 hours. After the reaction was completed, the solvent was distilled off under reduced pressure, and anhydrous methanol was used. Washing, after multiple recrystallizations from ethanol, drying to obtain modified KH550 (g-KH550);

[0072] 1 g of SNF was ultrasonically dispersed in ethanol for 2 hours, and the g-KH550 was rapidly added at 60°C for 8 hours. After modification, the unreacted g-KH550 was washed with et...

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Abstract

The invention provides a carbon fiber surface grafted two-dimensional network structure reinforced polyether-ether-ketone composite material and a preparation method thereof, and belongs to the technical field of carbon fiber reinforced polymer matrix composite materials. The carbon fiber surface is functionalized (grafted with amino) by diazotization reaction, and active functional groups are introduced into the surface of the carbon fiber on the premise of not damaging the strength and integrity of the carbon fiber, so that the polarity and activity of the carbon fiber surface are improved;and then silicon dioxide nanowires and aminated graphene are grafted on the surface of the carbon fiber through covalent bond action to form the carbon fiber containing a two-dimensional interpenetrating network structure, so that the surface polarity and roughness of the carbon fiber are improved, the interface strength of the CF / PEEK composite material can be improved, and the problem of infirmcombination of the nano particles and the surface of the fiber is solved.

Description

technical field [0001] The invention relates to the technical field of carbon fiber reinforced polymer matrix composite materials, in particular to a carbon fiber surface grafted two-dimensional network structure reinforced polyether ether ketone composite material and a preparation method thereof. Background technique [0002] Polyetheretherketone (PEEK) has a regular structure and is a linear polymer containing benzene rings, ether bonds and ketone bonds. Due to the large number of benzene rings in the main chain, PEEK has good chemical stability and high strength. Rigidity; the ether bond on the main chain is relatively flexible and can rotate, so it has certain flexibility, can be melted and crystallized, and has good processing performance. In addition, PEEK has high temperature resistance, fatigue resistance, chemical resistance, wear resistance, hydrolysis resistance and excellent mechanical properties. It has been used in aerospace, automobile, machinery, petrochemic...

Claims

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Application Information

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IPC IPC(8): C08L61/16C08K9/04C08K7/06C08K9/06C08K7/10C08K3/04C08K9/02C08J5/06
CPCC08J5/06C08J2361/16C08K7/06C08K7/10C08K9/02C08K9/04C08K9/06C08K2201/011C08K3/042
Inventor 赵晓刚张克王滔周宏伟王大明陈春海
Owner JILIN UNIV
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