Preparation method of carbon fiber/carbon nano tube/epoxy resin multi-dimensional hybrid composite

A technology of carbon nanotubes and epoxy resin, which is applied in the field of nanomaterials, can solve problems such as easy agglomeration, high surface energy of carbon nanotubes, and difficulty in achieving uniform dispersion, so as to achieve firm interface bonding and improve interlayer shear strength Insufficient, the effect that preparation method is simple and easy

Inactive Publication Date: 2012-12-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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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  • Preparation method of carbon fiber/carbon nano tube/epoxy resin multi-dimensional hybrid composite
  • Preparation method of carbon fiber/carbon nano tube/epoxy resin multi-dimensional hybrid composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: The multi-walled carbon nanotubes (OD<8nm) and carbon fibers prepared by the arc discharge method are used as the initial raw materials. After the multi-walled carbon nanotubes are purified, the carbon nanotubes and carbon fibers are acidified, chlorinated, and aminated, respectively. , and then anhydrided with pyromellitic dianhydride, the carbon nanotubes are chemically cross-linked with liquid bisphenol A epoxy resin (E-51), and the surface is connected with liquid bisphenol A epoxy resin The multi-walled carbon nanotubes are compounded with carbon fibers anhydrided with pyromellitic dianhydride in a certain way to obtain a multi-dimensional hybrid composite material containing carbon fibers / carbon nanotubes / epoxy resin.

[0032] Step (1): In a 250mL single-neck round bottom flask equipped with a stirrer, add 1.1g of dried multi-walled carbon nanotube raw material and 100mL, 20% nitric acid solution, treat it under 120kHz ultrasonic wave for 10 hours, and t...

Embodiment 2

[0041] Example 2: The single-walled carbon nanotubes (OD<8nm) prepared by chemical vapor deposition are used as the initial raw material, the single-walled carbon nanotubes are purified, and the carbon nanotubes and carbon fibers are acidified, chlorinated, aminated, and then After being anhydrided with benzophenone tetra-acid dianhydride, carbon nanotubes and liquid bisphenol A type epoxy resin (E-54) are carried out chemical cross-linking reaction, then the surface is connected with liquid bisphenol A type epoxy resin (E-54). -54) single-walled carbon nanotubes, and then compound them with carbon fibers anhydrided with benzophenone tetraacid dianhydride in a certain way to obtain a multidimensional hybrid composite material containing carbon fibers / carbon nanotubes / epoxy resin

[0042] Step (1): In a 500mL single-neck round bottom flask equipped with a stirrer, add 1.1g of dried single-walled carbon nanotube raw material and 100mL, 20% weight concentration of sulfuric acid, a...

Embodiment 3

[0050] Example 3: Single-walled carbon nanotubes (OD < 8nm) prepared by laser evaporation were used as the initial raw material. The single-walled carbon nanotubes were purified, and carbon fibers and carbon nanotubes were acidified, chlorinated, and aminated, and then After anhydrided with N,N'-dianhydride diphenylmethane, the carbon nanotubes and liquid bisphenol A epoxy resin (E-44) are chemically cross-linked to obtain liquid bisphenol A type epoxy resin on the surface. Single-wall carbon nanotubes of epoxy resin (E-44), and then compound them with carbon fibers anhydrided with N,N'-dianhydride diphenylmethane in a certain way to obtain carbon fiber / carbon nanotube / epoxy resin Multidimensional hybrid composites.

[0051] Step (1): in the 500mL single-neck round bottom flask that has been equipped with stirrer, add 10g through the dry single-walled carbon nanotube raw material and the sulfuric acid of 250mL, 20% weight concentration, process 80 hours under 120kHz ultrasonic...

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Abstract

The invention belongs to the technical field of nano materials, and in particular relates to a preparation method of a carbon fiber / carbon nano tube / epoxy resin multi-dimensional hybrid composite. The invention comprises the following steps: carrying out surface carboxylation and chloride acetylation on carbon nano tubes and carbon fibers, introducing diamine or polyamine, and modifying the amino-grafted carbon nano tubes with small-molecule aromatic polyanhydride compounds to prepare carbon nano tubes carrying with anhydride groups; carrying out ultrasonic oscillation, stirring at a high speed to dispersing the carbon nano tubes in an epoxy resin matrix, and curing with organic anhydride curing agent to obtain an epoxy resin polymer containing carbon nano tubes; and using the epoxy resinpolymer containing the carbon nano tubes as the matrix for being compounded with the carbon fibers to form the covalently-bonded multi-dimensional hybrid composite structure. The invention has the advantage of convenient preparation; the carbon nano tubes are endued with activity for participating in the reaction, and the anhydride groups on the carbon nano tubes and the epoxy groups in the epoxyresin generate chemical crosslink, thereby promoting the dispersion of the carbon nano tubes in the epoxy resin; and the epoxy resin is toughened by using the strength and the toughness of the carbonnano tubes to enhance the bonding strength with the carbon fiber substrate, thus improving the overall performance of the carbon fiber / carbon nano tube / epoxy resin multi-dimensional hybrid composite,and widening the application of the carbon fibers, the carbon nano tubes and the epoxy resin.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a method for preparing a carbon fiber / carbon nanotube / epoxy resin multidimensional hybrid composite material. Background technique [0002] 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. 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 the molecular structure of the curing agent. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B82B3/00
Inventor 邱军陈典兵
Owner TONGJI UNIV
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