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Method for preparing composite material through ionic liquid modified carbon nano tube

A technology of ionic liquids and composite materials, which is applied in the field of carbon nanotube dispersion and carbon nanotube composite materials, can solve the problems of migration and exudation of ionic liquids, reduction of material structure and performance, and performance degradation of composite materials, etc., to achieve environmental compatibility , enhance interface bonding, improve the effect of dispersion

Inactive Publication Date: 2015-04-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method also has obvious defects: first, ionic liquids do not have good compatibility with most common polymers, so that the choice of polymer matrix is ​​greatly limited, often only compatible with a certain polymer, and The compatibility with other polymers is poor, and the performance of the obtained composite material is greatly reduced; second, although the force between the ionic liquid and the carbon nanotube is strong, the weak physical force such as van der Waals force is between the ionic liquid and the polymer matrix. In the actual use environment, the ionic liquid will migrate and bleed (bleeding), thereby reducing the structure and performance of the material
However, the surface of carbon nanotubes modified by this polyionic liquid method is still limited by the poor compatibility between the ionic liquid and the matrix material. What is the compatibility after being added to the matrix material as a filler? universality, unknown
So far, there is no report on the preparation of nanocomposites using ionic liquid-modified carbon nanotubes dispersed in general polymer systems

Method used

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  • Method for preparing composite material through ionic liquid modified carbon nano tube
  • Method for preparing composite material through ionic liquid modified carbon nano tube
  • Method for preparing composite material through ionic liquid modified carbon nano tube

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Weigh 50 mg of carbon nanotubes (CNTs) and 100 mg of ionic liquid containing reactive group hydroxyl (-OH), mix them in an agate mortar, and grind them thoroughly for 30 minutes to obtain ionic liquid-modified carbon nanotubes (labeled as IL- CNTs). 250mg of maleic anhydride-grafted PP was dissolved in 100ml of toluene to form a solution. Add the above-mentioned ionic liquid modified carbon nanotubes (IL-CNTs) to the prepared PP toluene solution, add 5mg DMAP, 15mgEDC, pass into N 2After 30 minutes of air protection, the temperature was raised to 60° C., and the reaction was performed under magnetic stirring for 24 hours under a nitrogen atmosphere. After cooling to room temperature, a large amount of methanol solution was added to obtain a black precipitate, which was centrifuged at 3000 rpm to obtain a composite material (carbon nanotube filling amount 20 wt%).

Embodiment 2

[0041] Weigh 37.5mg CNTs and 75mg containing reactive group amine (-NH 2 ) ionic liquid, mixed in an agate mortar, and fully ground for 30 minutes to obtain ionic liquid-modified carbon nanotubes (marked as IL-CNTs). 250mg of maleic anhydride-grafted PP was dissolved in 100ml of toluene to form a solution. The above-mentioned ionic liquid modified carbon nanotubes (IL-CNTs) were added to the prepared PP toluene solution, 5 mg DMAP, 15 mg EDC were added, and N 2 After 30 minutes of air protection, the temperature was raised to 60° C., and the reaction was performed under magnetic stirring for 24 hours under a nitrogen atmosphere. After cooling to room temperature, a large amount of methanol solution was added to obtain a black precipitate, which was centrifuged at 3000 rpm to obtain a composite material (carbon nanotube filling 15 wt%).

Embodiment 3

[0043] Weigh 25mg of CNTs and 50mg of amine containing reactive groups (-NH 2 ) ionic liquid, mixed in an agate mortar, and fully ground for 30 minutes to obtain ionic liquid-modified single-walled carbon nanotubes (marked as IL-CNTs). 250mg of maleic anhydride-grafted PP was dissolved in 100ml of toluene to form a solution. The above-mentioned ionic liquid modified carbon nanotubes (IL-CNTs) were added to the prepared PP toluene solution, 5 mg DMAP, 15 mg EDC were added, and N 2 After 30 minutes of air protection, the temperature was raised to 60° C., and the reaction was performed under magnetic stirring for 24 hours under a nitrogen atmosphere. After cooling to room temperature, a large amount of methanol solution was added to obtain a black precipitate, which was centrifuged at 3000 rpm to obtain a composite material (carbon nanotube filling 10 wt%).

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Abstract

The invention discloses a reactive ionic liquid modified and dispersed carbon nano tube and a method for preparing a carbon nano tube composite material. The method is characterized by particularly comprising the following steps of: modifying the surface of a carbon nano tube by using the ionic liquid with a reactive group; mixing the modified carbon nano tube with a polymer solution which contains the corresponding reactive group, and carrying out chemical reaction bonding between the reactive group of the ionic liquid and high-molecular active groups under the condition of proper temperature and / or catalyst to furthest realize the uniform dispersion of the carbon nano tube in a matrix and enhance the interface strength between the carbon nano tube and the high-molecular matrix so as to prepare the carbon nano tube composite material. The method disclosed by the invention has the advantages of simple steps, environmental friendliness, good compatibility and suitability for industrialized production. The material prepared by adopting the method disclosed by the invention keeps both flexibility and processibility of the polymer matrix and excellent characteristics of the carbon nano tube.

Description

technical field [0001] The invention relates to the fields of carbon nanotube dispersion and carbon nanotube composite materials, in particular to a method for modifying reactive ionic liquids, uniformly dispersing carbon nanotubes and preparing high-content carbon nanotube composite materials. Background technique [0002] Carbon nanotubes have excellent electrical and mechanical properties and a huge aspect ratio, and are ideal fillers to maintain the flexibility and easy processing of the polymer matrix while improving the electrical conductivity of the material. The prerequisite for achieving ideal target performance is that carbon nanotubes are uniformly dispersed in the polymer matrix and have good interfacial bonding while maintaining their structural integrity and excellent performance. However, the strong interaction between carbon nanotubes, the intertwining between carbon nanotubes and the incompatibility between carbon nanotubes and polymer materials make it diff...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K7/00C08L51/06C08L51/00
Inventor 赵丽萍
Owner SHANGHAI JIAO TONG UNIV
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