Preparation method for hyperbranched polymer grafted carbon nanotube 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 interfacial interaction, affecting the comprehensive performance and service life of composite materials, poor wettability, etc.

Inactive Publication Date: 2016-08-17
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

Experimental program
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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 0.3g of carbon nanotubes to 50mL of concentrated nitric acid with a mass percentage concentration of 65%, ultrasonic treatment 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...

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 3g of mercaptosilane-containing coupling agent (γ-mercaptopropyltrimethoxysilane) into 30mL mixed solvent, adjust the pH value to 3.5 with acetic acid, stir magnetically at room temperature for 50 minutes, then add 0.2g 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 and absolute...

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Abstract

The invention relates to a preparation method for a hyperbranched polymer grafted carbon nanotube based on click chemistry. The preparation method comprises the following steps: 1) subjecting the carbon nanotube to treatment by utilizing concentrated nitric acid so as to obtain an acid-treated carbon nanotube; 2) subjecting the acid-treated carbon nanotube to reaction with a mercapto contained silane coupling agent so as to obtain a mercapto contained silane coupling agent grafted carbon nanotube; 3) subjecting alkyne butanol and mercaptopropionic acid to esterification reaction so as to obtain a hyperbranched monomer; and 4) with a mercapto group on the mercapto contained silane coupling agent grafted carbon nanotube and an alkynyl group contained in the hyperbranched monomer as reactive groups, initiating mercapto-alkynyl click reaction by utilizing ultraviolet light so as to eventually obtain the hyperbranched polymer grafted carbon nanotube. The invention has the following advantages: through light-initiated click reaction, the preparation method reduces the usage amount of a solvent, simplifies post-processing steps, facilitates to large-scale production, and enables active functional groups on the surface layer of the carbon nanotube to be increased through grafting of a hyperbranched polymer coating layer formed on the surface of the carbon nanotube, thereby facilitating to 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, similar to the interlayer spacing of graphite ­ , there are weak van der Waals forces 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 comprehensive...

Claims

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Application Information

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Patent Type & Authority Applications(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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