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Carbon fiber/carbon nanotube/epoxy resin/polyimide multi-dimensional mixed composite material and preparation process thereof

A technology of carbon nanotubes and epoxy resin, applied in the field of nanomaterials, can solve problems such as easy agglomeration, difficulty in achieving uniform dispersion, and high surface energy of carbon nanotubes

Inactive Publication Date: 2014-12-17
DANYANG DANJIN AUTO FITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Carbon nanotubes have high surface energy and are prone to agglomeration, making it difficult to achieve uniform dispersion in polymers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation method of carbon fiber / carbon nanotube / epoxy resin / polyimide multidimensional hybrid composite material proposed by the present invention, its specific steps are as follows:

[0018] (1) Weigh 1~1×10 2 g dry carbon nanotubes and 10g ~ 1×10 3 g organic acid mixed, ultrasonic at 10kHz or 10r / min~10 6 Stirring at a centrifugal speed of r / min for 80 hours, then heated to 100°C, reacted for 12 hours, filtered with a microfiltration membrane, washed repeatedly until neutral, and dried in vacuum at 50°C for 12 hours to obtain purified carbon nano Tube;

[0019] (2) Divide 1~1×10 2 Obtain purifying carbon nanotube 1~1×10 in the carbon fiber of g drying, step (1) 2 g respectively and strong oxidizing acid 1~1×10 4 mL was mixed, treated under 120kHz ultrasonic wave for 80 hours, then heated to 25°C, stirred and refluxed for 12 hours, filtered by ultra-microporous membrane, washed repeatedly until the solution was neutral, and vacuum-dried at 50°C for 1...

Embodiment 2

[0026] A kind of preparation method of carbon fiber / carbon nanotube / epoxy resin / polyimide multidimensional hybrid composite material proposed by the present invention, its specific steps are as follows:

[0027] (1) Weigh 1~1×10 2 g dry carbon nanotubes and 10g ~ 1×10 3 g organic acid mixed, ultrasonic at 10kHz or 10r / min~10 6 Stir at a centrifugal speed of r / min for 25 hours, then heat to 100°C, react for 24 hours, filter with a microfiltration membrane, wash repeatedly until neutral, and vacuum dry at 150°C for 28 hours to obtain purified carbon nano Tube;

[0028] (2) Divide 1~1×10 2Obtain purifying carbon nanotube 1~1×10 in the carbon fiber of g drying, step (1) 2 g respectively and strong oxidizing acid 1~1×10 4 mL mixed, treated under 30kHz ultrasonic wave for 20 hours, then heated to 25-120°C, stirred and refluxed for 20 hours, filtered with ultra-microporous membrane, washed repeatedly until the solution was neutral, and vacuum-dried at 200°C for 16 hours. Hours...

Embodiment 3

[0035] A kind of preparation method of carbon fiber / carbon nanotube / epoxy resin / polyimide multidimensional hybrid composite material proposed by the present invention, its specific steps are as follows:

[0036] (1) Weigh 1~1×10 2 g dry carbon nanotubes and 10g ~ 1×10 3 g organic acid mixed, ultrasonic at 50kHz or 10r / min~10 6 Stir at a centrifugal speed of r / min for 18 hours, then heat to 100°C, react for 18 hours, filter with microfiltration membrane, wash repeatedly until neutral, and vacuum dry at 125°C for 12 hours to obtain purified carbon nano Tube;

[0037] (2) Divide 1~1×10 2 Obtain purifying carbon nanotube 1~1×10 in the carbon fiber of g drying, step (1) 2 g respectively and strong oxidizing acid 1~1×10 4 mL was mixed, treated under 40kHz ultrasonic wave for 36 hours, then heated to 40°C, stirred and refluxed for 40 hours, filtered by ultra-microporous membrane, washed repeatedly until the solution was neutral, and vacuum-dried at 100°C for 25 hours. Obtain a...

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PUM

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Abstract

The invention discloses a carbon fiber / carbon nanotube / epoxy resin / polyimide multi-dimensional mixed composite material and a preparation process thereof. The preparation process comprises the following steps: purifying the surface of a carbon nanotube, performing carboxylation and acylating chlorination on the surface of the purified carbon nanotube, introducing diamine or polyamine with a characteristic structure to obtain a graft type carbon nanotube with active amino groups on the surface, and modifying the carbon nanotube grafted with active amino groups with a micromolecular aromatic polyanhydride compound to prepare a carbon nanotube with anhydride groups; ultrasonically shaking and stirring at a high speed to disperse the carbon nanotube in epoxy resin and a polyimide substrate, curing by adopting an organic anhydride type curing agent to obtain a carbon nanotube-containing epoxy resin and polyimide polymer, and compounding the polymer as a substrate with carbon fibers in a certain way to finally form the multi-dimensional mixed composite material structure connected by covalent bonds, wherein a large quantity of polymers are wound on the surfaces of the carbon fibers and the carbon nanotube.

Description

[0001] technical field [0002] The invention belongs to the technical field of nanometer materials, and in particular relates to a carbon fiber / carbon nanotube / epoxy resin / polyimide multidimensional hybrid composite material and a preparation process thereof. Background technique [0003] Epoxy resin is a thermosetting oligomer with poor properties. In addition to being used as a stabilizer for polyvinyl chloride, it has no direct use value. But when it reacts with the curing agent to form a three-dimensional cross-linked network structure, it presents a series of excellent properties. Therefore, the chemical reaction between curing agent and epoxy resin is the basis and core of epoxy resin application. [0004] The behavior of the epoxy resin during the curing process and the performance of the cured product depend to a large extent on the performance of the curing agent and the interaction and reasonable coordination between it and the resin, which in turn depends on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L79/08C08K9/04C08K7/06C08K7/00C08K3/04C08G59/42
Inventor 徐祝方
Owner DANYANG DANJIN AUTO FITTINGS
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