Modified carbon material as well as preparation method and application thereof

A carbon material and modified carbon technology, applied in the field of modified carbon materials and their preparation, can solve the problems of large surface energy, weak surface force, poor compatibility, etc., achieve good modification effect, avoid negative effects, strong The effect of interfacial forces

Active Publication Date: 2015-01-07
ORDOS JUNSHI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inherent large surface energy of carbon nanotubes and graphene, the characteristics of easy agglomeration, the dispersion state of carbon materials in the carbon-based epoxy resin composites obtained in the existing methods is not ideal
At the same time, due to the poor compatibility between the carbon material and epoxy resin, the surface force of the two in the resulting composite material is weak. Although some studies have modified it with a silane coupling agent, the carbon material surface Due to the lack of functional groups, the effect of modified carbon materials in modifying epoxy resins is still not ideal

Method used

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  • Modified carbon material as well as preparation method and application thereof
  • Modified carbon material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] ① Disperse 200mg of multi-walled carbon nanotubes in a mixed solution of 100g of concentrated sulfuric acid and concentrated nitric acid (the mass ratio of concentrated sulfuric acid and concentrated nitric acid is 4:1), and stir at a speed of 4000r / min in an environment of 50°C 12h, then naturally cooled to room temperature, washed with deionized water until neutral, and then washed 3 times with absolute ethanol.

[0050] ② Disperse 1.5g of carbon nanotubes treated in step ① in a solution consisting of 50mL of thionyl chloride and 0.5mL of N,N dimethylformamide, and reflux the resulting solution at 70°C After 20 h, after the reaction, the unreacted thionamide was distilled off under reduced pressure, and then washed three times with absolute ethanol.

[0051] ③ Disperse 1.5 g of the carbon nanotubes treated in step ② in 50 mL of ethylenediamine, and condense the resulting solution under reflux for 20 hours at 60 ° C. After the reaction, remove the unreacted ethylenedia...

Embodiment 2

[0055] 1. with step 1. in embodiment 1;

[0056] 2. with the step in embodiment 1 2.;

[0057] 3. with the step 3. in embodiment 1;

[0058] ④ Disperse 0.06g of the modified carbon nanotubes obtained through the above steps and methods in 5mL of acetone solution, and after ultrasonic dispersion for 20min, add it to 9.9g of bisphenol A-type epoxy resin (E51), Then ultrasonically disperse for 10 minutes, then add 1.98g of curing agent 593, stir mechanically for 5 minutes, pour into a mold preheated at 30°C, then transfer to an oven at 30°C, vacuum degas for 30min, and then After curing for 24 hours, an epoxy resin composite material with a mass percentage of carbon nanotubes of 0.5% was obtained.

[0059] The impact strength of the epoxy resin composite material increased from 59.3MPa of pure resin to 79.5MPa, and the breaking strength of the epoxy resin composite increased from 1.21MPa·m of pure resin 1 / 2 , increased to 2.24MPa·m 1 / 2 .

Embodiment 3

[0061] 1. with step 1. in embodiment 1;

[0062] 2. with the step in embodiment 1 2.;

[0063] 3. with the step 3. in embodiment 1;

[0064] 4. Disperse 0.96g of the modified carbon nanotubes obtained through the above steps and methods in 5mL of acetone solution, and after ultrasonic dispersion for 20min, add it to 9.9g of bisphenol A-type epoxy resin (E51), Then ultrasonically disperse for 10 minutes, then add 1.98g of curing agent 593, stir mechanically for 5 minutes, pour into a mold preheated at 30°C, then transfer to an oven at 30°C, vacuum degas for 30min, and then After curing for 24 hours, an epoxy resin composite material with a mass percentage of carbon nanotubes of 0.8% was obtained.

[0065] The impact strength of the epoxy resin composite material increased from 59.3MPa of pure resin to 84.2MPa, and the breaking strength of the epoxy resin composite increased from 1.21MPa·m of pure resin 1 / 2 , increased to 2.36MPa m 1 / 2 .

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Abstract

The invention relates to a modified carbon material as well as a preparation method and an application thereof, and belongs to the field of preparation of engineering materials. According to the technical scheme disclosed by the invention, modification of the carbon material comprises the following three steps: acidification of the carbon material; preparation of derivatives of chlorine of the carbon material; and amination of the carbon material. The method can be suitable for carbon materials with different shapes and structures, and the modified carbon material displays a good modification effect when being applied to modification of epoxy resin materials.

Description

technical field [0001] The invention relates to a modified carbon material and its preparation method and application, belonging to the field of engineering material preparation. Background technique [0002] Epoxy resin refers to the general term for a class of compounds containing two or more epoxy groups in the molecule. The cured epoxy resin has the advantages of strong adhesion, high temperature resistance, and good corrosion resistance, and is widely used in the fields of automobiles, navigation, aerospace, and electrochemistry. However, the cured resin has the disadvantages of low toughness and poor conductivity, which greatly limits its application range. [0003] Carbon material refers to a general term for a class of materials composed of a single carbon element and electronic orbitals hybridized according to SP, SP2 or SP3. It includes substances with various structures and forms such as three-dimensional diamond crystals, two-dimensional graphene, one-dimension...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00C08K3/04C08K9/04
Inventor 武湛君孙涛卓琴王智刘新
Owner ORDOS JUNSHI TECH
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