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A method for the preparation of hyperbranched polymer-grafted carbon nanotubes based on click chemistry

A technology of hyperbranched polymer and carbon nanotubes, which is applied in the field of preparation of hyperbranched polymer grafted carbon nanotubes, can solve the problems of small interface effect, poor wettability, affecting the comprehensive performance and service life of composite materials, etc.

Inactive Publication Date: 2019-05-24
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, due to the inert surface of carbon nanotubes, the interface between them and the resin matrix is ​​small, and the wettability is poor, which seriously affects the comprehensive performance and service life of the composite material.

Method used

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Examples

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Effect test

Embodiment 1

[0021] This example illustrates a method for preparing hyperbranched polymer-grafted carbon nanotubes based on click chemistry provided by the present invention.

[0022] Step 1: Add 0.3 g of carbon nanotubes to 50 mL of concentrated nitric acid with a concentration of 65% by mass, ultrasonically treat for 45 minutes, and react in an oil bath at 50°C for 50 minutes. After the reaction, filter with suction and wash with absolute ethanol 5 times, placed in a vacuum drying oven at 120°C for 24 hours to obtain acid-treated carbon nanotubes;

[0023] Step 2: Disperse 1 g of mercaptosilane-containing coupling agent (γ-mercaptopropylmethyldimethoxysilane) into 10 mL of mixed solvent, adjust the pH to 4 with acetic acid, and stir magnetically for 40 minutes at room temperature. Add 0.2g of acid to treat carbon nanotubes, ultrasonically treat them for 40 minutes, and then react in an oil bath at 120°C for 5 hours. Dry in a vacuum drying oven for 24 hours to obtain grafted carbon nanot...

Embodiment 2

[0027] This example illustrates a method for preparing hyperbranched polymer-grafted carbon nanotubes based on click chemistry provided by the present invention.

[0028] Step 1: Add 0.3g of carbon nanotubes to 100mL of concentrated nitric acid with a concentration of 65% by mass, ultrasonically treat for 30 minutes, and react in an oil bath at 70°C for 40 minutes. After the reaction, filter with suction and wash with absolute ethanol 4 times, placed in a vacuum drying oven at 120°C for 24 hours to obtain acid-treated carbon nanotubes;

[0029] Step 2: Disperse 3 g of mercaptosilane-containing coupling agent (γ-mercaptopropyltrimethoxysilane) into 30 mL of mixed solvent, adjust the pH value to 3.5 with acetic acid, and stir magnetically for 50 minutes at room temperature, then add 0.2 g Acid treatment of carbon nanotubes, ultrasonic treatment for 60 minutes, and then react in an oil bath at 120°C for 6 hours, filter with suction after the reaction, wash with deionized water an...

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Abstract

The invention relates to a method for preparing hyperbranched polymer-grafted carbon nanotubes based on click chemistry. The steps are as follows: 1) treating carbon nanotubes with concentrated nitric acid to obtain acid-treated carbon nanotubes; 2) treating carbon nanotubes with acid Carbon nanotubes were reacted with mercapto-containing silane coupling agents to obtain grafted carbon nanotubes containing mercapto-silane coupling agents; 3) hyperbranched monomers were prepared by esterification of butynyl alcohol and mercaptopropionic acid; 4) mercapto-containing silanes The mercapto groups on the carbon nanotubes grafted by the coupling agent and the alkyne groups contained in the hyperbranched monomers are reactive groups, and ultraviolet light is used to trigger the mercapto-ene click reaction to finally obtain the hyperbranched polymer grafted carbon nanotubes. The invention has the following advantages: the click reaction is carried out by photoinitiation, the amount of solvent is reduced, the post-treatment steps are simplified, and it is beneficial to large-scale production; The increase of active functional groups on the surface of the tube is beneficial to the further use of the carbon nanotube.

Description

technical field [0001] The invention relates to a method for preparing hyperbranched polymer grafted carbon nanotubes based on click chemistry. Background technique [0002] Carbon nanotubes are a new type of carbon material with a hollow tubular structure. The interlayer spacing is similar to that of graphite, and there is a weak van der Waals force between the layers. Due to its unique structure, carbon nanotubes have the characteristics of light weight, large specific surface area, large aspect ratio, and excellent mechanical and electrical conductivity. At present, the application of carbon nanotubes in aerospace, aviation, military and other fields is developing rapidly. [0003] Due to the unique structure of carbon nanotubes, it has poor dispersion and is easy to agglomerate or entangle. In addition, due to the inert surface of carbon nanotubes, the interface between them and the resin matrix is ​​small, and the wettability is poor, which seriously affects the compr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00
CPCC08G83/001
Inventor 熊磊兰道松梁红波黄圣梅
Owner NANCHANG HANGKONG UNIVERSITY
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