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High-interface-bonding-firmness carbon fiber/carbon nanotube composite material and preparation technique thereof

A carbon nanotube and interface bonding technology, which is applied in the field of nanomaterials, can solve the problems of difficult uniform dispersion, easy agglomeration, and high surface energy of carbon nanotubes, achieves increased interface strength, simple and easy preparation method, and good interlayer The effect of shear strength

Inactive Publication Date: 2014-03-12
DANYANG DANJIN AVIATION MATERIAL TECH
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Carbon nanotubes have high surface energy and are prone to agglomeration, making it difficult to disperse uniformly in polymers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Multi-walled carbon nanotubes (OD<8nm) and carbon fibers prepared by chemical vapor deposition were used as the initial raw materials. Nanotubes and m-phenylene bismaleimide undergo Michael addition reaction to obtain multi-walled carbon nanotubes with m-phenylene bismaleimide on the surface, and then combine them with aminated carbon fiber cloth in a certain amount. Composite by means of multi-dimensional hybrid composite materials containing carbon fiber / carbon nanotube / bismaleimide resin.

[0030]Step (1): In a 250mL single-necked round-bottomed flask equipped with a stirrer, add 1.1g of dried multi-walled carbon nanotube raw material and 100mL, 30% nitric acid solution, treat it under 100kHz ultrasonic waves for 20 hours, and then heat to 30°C, reacted for 40 hours, filtered with poly(tetrafluoroethylene) microfiltration membrane with a pore size of 0.8 μm, washed with deionized water for 4-10 times until neutral, and vacuum dried at 30°C for 48 hours to obtain the ...

Embodiment 2

[0038] Double-walled carbon nanotubes (OD<8nm) prepared by solar energy method were used as the initial raw material. Phenyl ether type bismaleimide undergoes Michael addition reaction to obtain double-walled carbon nanotubes with diphenyl ether type bismaleimide attached to the surface, and then compound them with aminated carbon fibers in a certain way. A multidimensional hybrid composite material containing carbon fiber / carbon nanotube / bismaleimide resin was obtained.

[0039] Step (1): in the 500mL single-neck round bottom flask that magnetic stirring rotor has been housed, add 1.1g double-walled carbon nanotube raw material, the sulfuric acid of 100mL, 50% weight concentration, with 10 3 Treat at the speed of r / min for 30 hours, then heat to 150°C, react for 50 hours, filter with polytetrafluoroethylene microfiltration membrane with a pore size of 0.8 μm, wash repeatedly with deionized water until neutral, and vacuum dry at 100°C After 36 hours, the purified carbon nanot...

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Abstract

The invention belongs to the technical field of nano materials, and particularly relates to a high-interface-bonding-firmness carbon fiber / carbon nanotube composite material and a preparation technique thereof. The preparation technique comprises the following steps: carrying out carboxylation and acyl-chlorination on purified carbon nanotubes and dried carbon fibers, introducing diamines or polyamines with characteristic structure so as to connect abundant diamines or polyamines onto the surfaces of the carbon nanotubes and carbon fibers, carrying out addition reaction on the carbon nanotubes and a bismaleimide resin to obtain a carbon-nanotube-containing bismaleimide resin linear block polymer, and compounding the block polymer used as a base with the carbon fibers in a certain mode to finally form a multidimensional hybrid composite material structure connected by covalent bonds. The strength and toughness of the carbon nanotubes are utilized to strengthen the bismaleimide and enhance the bonding strength with the carbon fiber base surface, thereby enhancing the overall performance of the carbon fiber / carbon nanotube / bismaleimide resin multidimensional hybrid composite material.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a carbon fiber / carbon nanotube composite material with firm interface bonding and a preparation process thereof. Background technique [0002] Composite materials are an important part of the field of new materials. Compared with traditional materials, composite materials have a series of superior properties such as strong designability, high specific strength and specific modulus, good fatigue fracture resistance, and structural and functional integration. Composite materials, as irreplaceable functional and structural materials, are indispensable basic materials for the development of modern industry, national defense and science and technology, and are also an important material basis for the development of new technological revolutions. They have become important leading materials in the field of new materials. [0003] The development process of advan...

Claims

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Application Information

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IPC IPC(8): C08G73/10C09C1/44C09C3/08C09C3/06C09C3/04C08J5/06
Inventor 邱军李仁府徐祝方商苗苗商林方
Owner DANYANG DANJIN AVIATION MATERIAL TECH
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