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Click chemistry based preparation method of carbon nanotube grafted carbon fiber reinforcement

A carbon nanotube and click chemistry technology is applied in the field of preparation of carbon nanotube-grafted carbon fiber reinforcements, which can solve the problem that the mechanical properties of carbon nanotubes cannot be fully exerted, the reinforcing effect of carbon nanotubes is affected, and the dispersibility of carbon nanotubes is poor. problem, to achieve the effect of good adhesion, high yield, and improved interface properties

Inactive Publication Date: 2016-03-23
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Carbon nanotubes have extremely high strength and great toughness. However, the poor dispersion of carbon nanotubes and the inability to orientate them seriously affect the reinforcement effect of carbon nanotubes in the resin matrix, so that the mechanical properties of carbon nanotubes cannot be obtained. fully use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This example illustrates a method for preparing a carbon nanotube-grafted carbon fiber reinforcement based on click chemistry provided by the present invention.

[0024] Step 1: Immerse 6g of carbon fiber in 120mL of mixed acid, ultrasonically treat it for 5 hours, and then transfer it to an oil bath at 80°C for 2 hours of reflux reaction. After the reaction is completed, wash it with deionized water until it is neutral, and then put the carbon fiber at 80°C for vacuum drying. Dry in the box for 24 hours to obtain acid-treated carbon fiber;

[0025] Step 2: Disperse 3g of acid-treated carbon fiber in 100mL of mixed solvent, adjust the pH to 4 with acetic acid, and add 40g of mercaptosilane-containing coupling agent (γ-mercaptopropylmethyldimethoxysilane) after ultrasonic treatment for 30 minutes , stirred magnetically at room temperature for 20 minutes, after the reaction was completed, washed 3 times with a mixed solution of ethanol, acetone and deionized water to remo...

Embodiment 2

[0032] This example illustrates a method for preparing a carbon nanotube-grafted carbon fiber reinforcement based on click chemistry provided by the present invention.

[0033] Step 1: Immerse 6g of carbon fiber in 200mL of mixed acid, ultrasonically treat it for 3 hours, then transfer it to an oil bath at 40°C for reflux reaction for 4 hours, wash it with deionized water until neutral after the reaction, and then put the carbon fiber at 80°C for vacuum drying Dry in the box for 24 hours to obtain acid-treated carbon fiber;

[0034] Step 2: Disperse 3g of acid-treated carbon fiber in 150mL of mixed solvent, adjust the pH to 4 with acetic acid, and add 50g of mercaptosilane-containing coupling agent (γ-mercaptopropyltrimethoxysilane) after ultrasonic treatment for 60 minutes. Stir for 40 minutes, wash 4 times with a mixed solution of ethanol, acetone and deionized water after the reaction to remove the ungrafted mercapto-containing silane coupling agent, and place it in a vacuu...

Embodiment 3

[0041] This example illustrates a method for preparing a carbon nanotube-grafted carbon fiber reinforcement based on click chemistry provided by the present invention.

[0042] Step 1: Immerse 6g of carbon fiber in 160mL of mixed acid, ultrasonically treat it for 4 hours, and then transfer it to an oil bath at 60°C for 3 hours of reflux reaction. After the reaction is completed, wash it with deionized water until it is neutral, and then put the carbon fiber at 80°C for vacuum drying. Dry in the box for 24 hours to obtain acid-treated carbon fiber;

[0043] Step 2: Disperse 3g of acid-treated carbon fiber in 140mL of mixed solvent, adjust the pH to 5 with acetic acid, add 45g of mercaptosilane-containing coupling agent (γ-mercaptopropyltriethoxysilane) after ultrasonic treatment for 50 minutes, and keep at room temperature Stir magnetically for 30 minutes. After the reaction, wash 5 times with a mixed solution of ethanol, acetone and deionized water to remove the ungrafted merc...

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Abstract

The invention discloses a click chemistry based preparation method of carbon nanotube grafted carbon fiber reinforcement. The preparation method specifically comprises the following steps: carrying out surface treatment on carbon fibers by utilizing a mixed acid to obtain acid treated carbon fibers; obtaining thiol-containing silane coupling agent grafted carbon fibers through reaction between the acid treated carbon fibers and a thiol-containing silane coupling agent; successively treating a carbon nanotube by utilizing nitric acid and hydrogen peroxide to obtain an oxidized carbon nanotube; obtaining an amino-containing silane coupling agent grafted carbon nanotube through reaction between the oxidized carbon nanotube and an amino-containing silane coupling agent; obtaining an allyl glycidyl ether grafted carbon nanotube through reaction between allyl glycidyl ether and the amino-containing silane coupling agent grafted carbon nanotube; finally obtaining the carbon nanotube grafted carbon fiber reinforcement by utilizing ultraviolet light to trigger thiol-ene click reaction. The preparation method has the advantages that the obtained carbon nanotube grafted carbon fiber reinforcement has the advantages of high surface roughness, high carbon nanotube grafting ratio, good adhesion to matrices, and the like.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube grafted carbon fiber reinforcement based on click chemistry. Background technique [0002] Carbon fiber has excellent mechanical properties, but its surface is inert, low in activity, poor in wettability with resin and two-phase bonding, and it is easy to form voids and defects on the interface when composited, and it is difficult to form an effective bond between the reinforcing phase and the resin matrix material. of bonding. Therefore, in order to improve the performance of carbon fiber reinforced composites, the overall optimal design of the carbon fiber surface must be carried out. [0003] Carbon nanotubes have extremely high strength and great toughness. However, the poor dispersion of carbon nanotubes and the inability to orientate them seriously affect the reinforcement effect of carbon nanotubes in the resin matrix, so that the mechanical properties of carbon nanotubes cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/02C08K9/06C08K7/06C08K7/24
CPCC08K7/06C08K7/24C08K9/02C08K9/06C08K2201/011
Inventor 熊磊兰道松梁红波黄圣梅
Owner NANCHANG HANGKONG UNIVERSITY
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