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Prepn process of carbon nanotube epoxy resin curing agent

A technology of epoxy resin curing and carbon nanotubes, applied in the direction of dyeing low-molecular-weight organic compounds, etc., can solve the problems of decreased thermal stability, poor heat resistance of epoxy resin, etc., to improve the interface, improve dispersibility and The effect of content

Inactive Publication Date: 2006-10-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But adding alicyclic or aliphatic amine-based curing agent in epoxy resin will make the heat resistance of epoxy resin worse, so although the addition of alicyclic and aliphatic aminated carbon nanotubes makes the epoxy resin Improved mechanical properties, but decreased thermal stability

Method used

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  • Prepn process of carbon nanotube epoxy resin curing agent
  • Prepn process of carbon nanotube epoxy resin curing agent
  • Prepn process of carbon nanotube epoxy resin curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 3 g of multi-walled carbon nanotubes with a purity of 95% into a 500 ml three-necked flask with a stirring device, then add a mixture of concentrated sulfuric acid and nitric acid with a volume ratio of 3:1, and ultrasonicate for 30 min. Carbon nanotubes were oxidized at 140°C and the reaction time was 20min. Gained carboxylated carbon nanotubes (infrared spectrum as shown in figure 1 ) was washed with deionized water until neutral. Dry in a vacuum oven at 50°C. Dissolve 1 g of carboxylated carbon nanotubes in N, N'-dimethylformamide (DMF) and sonicate for 30 min, add 2 g of N, N'-diaminodiphenyl sulfone, 2 g of N, N'-dicyclohexyl Carboximide, under 120 ℃, nitrogen protection, reaction time is 72h, the preparation surface contains the carbon nanotube of amine group (infrared spectrogram as shown in figure 2 ). The obtained product was washed with solutions such as DMF, THF, and absolute ethanol, and dried in a vacuum oven. The reaction equation is as follows: ...

Embodiment 2

[0032] Carboxylated single-walled carbon nanotubes were prepared according to the method described in Example 1. Take 1 g of carboxylated single-walled carbon nanotubes, dissolve 1 g of carboxylated carbon nanotubes in DMF and sonicate for 10 minutes, add 2 g of N, N'-diaminodiphenyl sulfone, 2 g of N, N'-dicyclohexyl carbonyl imine, at 200° C., nitrogen protection, and a reaction time of 12 hours, to prepare a curing agent for single-walled carbon nanotubes containing amine groups on the surface.

Embodiment 3

[0034] Carboxylated multi-walled carbon nanotubes were prepared according to the method described in Example 1. Dissolve 1 g of carboxylated carbon nanotubes in DMF and sonicate for 120 min, add 2 g of N, N'-diaminodiphenylmethane, 2 g of N, N'-dicyclohexyl carboximide, at 60 ° C, nitrogen protection , the reaction time is 120h, the preparation surface contains the multi-walled carbon nanotube curing agent of amine group (infrared spectrum image 3 .). The reaction equation is as follows:

[0035]

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Abstract

The preparation process of carbon nanotube epoxy resin curing agent includes the following steps: reaction of carbon nanotube and sulfuric acid / nitric acid at 50-170 deg.c under the ultrasonic action for 10-120 min to obtain carboxylated carbon nanotube; dissolving the carboxylated carbon nanotube in N, N'-dimethyl formamide solution to reaction at 60-200 deg.c under the ultrasonic action for 10-120 min, and adding aromatic amino compound and N, N'-dicyclohexyl carbimide shinking agent to prepare the aromatic carboxylated carbon nanotube. The epoxy resin curing agent with aromatic amino compound grafted to the surface of carbon nanotube can raise the mechanical performance of epoxy resin, raise the heat stability of epoxy resin, raise the dispersivity and content of carbon nanotube inside epoxy resin and improve the interface between carbon nanotube and epoxy resin.

Description

technical field [0001] The invention belongs to the field of organic polymer materials, and relates to a preparation method of an epoxy resin curing agent, in particular to a preparation method of a novel carbon nanotube epoxy resin curing agent. Background technique [0002] Carbon nanotubes have a unique atomic structure, a very high specific surface area, and excellent electrical, magnetic, and mechanical properties. Therefore, in scientific research and practical applications, carbon nanotubes have broad application prospects in many fields. [0003] Epoxy resin is a thermosetting oligomer with poor properties. In addition to being used as a stabilizer for polyvinyl chloride, etc., it has no direct use value. However, when it reacts with a 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 applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50C08K9/04C09C3/08
Inventor 余木火王聪李兆敏韩克清滕翠青
Owner DONGHUA UNIV
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