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A kind of epoxy-based ionic liquid/multi-walled carbon nanotube/polymer composite material and preparation method thereof

A multi-walled carbon nanotube, ionic liquid technology, applied in the direction of organic chemistry, can solve the problems of mechanical properties and processing performance decline, reduce the filling amount of carbon nanotubes, lose practical significance, etc., to improve processing performance, improve electrical performance. , the effect of reducing the amount of filler

Inactive Publication Date: 2020-02-14
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a conductive agent, with the increase of the amount of carbon nanotubes added, the mechanical properties and processing properties of the material will be greatly reduced, the value of use will be lost, and the practical significance will be lost. Therefore, the amount of carbon nanotubes used should be effectively controlled.
[0005] In general, the percolation threshold of conductive composites filled with carbon nanotubes is around 1.5%-3.0%, but when epoxy-based ionic liquid is added to the system, the filling amount of carbon nanotubes will be effectively reduced (by about around 40%)

Method used

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  • A kind of epoxy-based ionic liquid/multi-walled carbon nanotube/polymer composite material and preparation method thereof
  • A kind of epoxy-based ionic liquid/multi-walled carbon nanotube/polymer composite material and preparation method thereof
  • A kind of epoxy-based ionic liquid/multi-walled carbon nanotube/polymer composite material and preparation method thereof

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preparation example Construction

[0030] According to the present invention, the preparation method of described epoxy-based ionic liquid preferably comprises:

[0031] Mix epichlorohydrin and N-methylimidazole and react at 30-45°C for 3-5 hours. During the reaction, the color of the solution turns orange-yellow until it turns reddish brown. When the reactant turns reddish brown, it is more Stable, the reaction rate can be accelerated by increasing the temperature. Since the epoxy group is relatively active, a large amount of heat will be released when the ring-opening reaction occurs. In order to avoid the occurrence of the ring-opening reaction, the system temperature cannot be raised rapidly, so segmental heating is used. To control the degree of reaction, it is preferable to raise the temperature by 5°C to 65°C every half hour after the reaction for 3-5 hours, and stop the reaction after keeping the reaction at 65°C for 3 hours. As the reaction time prolongs, The viscosity of the system gradually increased...

Embodiment 1

[0040] The preparation of embodiment 1 epoxy-based ionic liquid

[0041] Measure epichlorohydrin and N-methylimidazole in a molar ratio of 1.2:1, and add them to a three-necked flask at room temperature, N 2 Protected, mechanically stirred, reacted at 45°C for 5h, during the reaction, the color of the solution changed from orange to reddish brown. After 5 hours of reaction, the temperature was increased by 5°C every half hour until 65°C, kept at 65°C for 3 hours, and then the reaction was stopped. As the reaction time prolongs, the viscosity of the system gradually increases. After stopping the reaction, the product was washed repeatedly with ether. Afterwards, the product was recrystallized and purified with acetone, and weighed after vacuum drying to obtain the product epoxy-based ionic liquid with a monomer conversion rate of 83.11%.

[0042] figure 1 Infrared spectrogram of the epoxy-based ionic liquid prepared in Example 1 of the present invention. figure 1 It shows t...

Embodiment 2

[0043] The preparation of embodiment 2 epoxy group ionic liquid

[0044] Measure epichlorohydrin and N-methylimidazole at a molar ratio of 2:1, and add them to a three-necked flask at room temperature, N 2 Protected, mechanically stirred, reacted at 45°C for 5h, during the reaction, the color of the solution changed from orange to reddish brown. After 5 hours of reaction, the temperature was increased by 5°C every half hour until 65°C, kept at 65°C for 3 hours, and then the reaction was stopped. As the reaction time prolongs, the viscosity of the system gradually increases. After stopping the reaction, the product was washed repeatedly with ether. Afterwards, the product was recrystallized and purified with acetone, and weighed after vacuum drying to obtain the product epoxy-based ionic liquid with a monomer conversion rate of 54.28%.

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Abstract

The invention provides an epoxy-based ionic liquid / multi-walled carbon nanotube / polymer composite material and a preparation method thereof, and belongs to the field of polymer materials. The composite material is obtained by blending an epoxy-based ionic liquid, multi-walled carbon nanotubes and a polymer; and the polymer is a polyester polymer. The invention also provides the preparation methodof the epoxy-based ionic liquid / multi-walled carbon nanotube / polymer composite material. The epoxy-based ionic liquid and the multi-walled carbon nanotubes are complexed for modification of the polymer, so that the epoxy-based ionic liquid / multi-walled carbon nanotube / polymer composite material has high electrochemical activity and stability of ionic liquid conductive composite materials, and thestrong conductivity of carbon nanotube conductive composite materials. At the same time, the ionic liquid inside the composite material can effectively prevent the carbon nanotubes from agglomerating,the synergy between the ionic liquid and the carbon nanotubes can also be taken into consideration, the filling amount of the carbon nanotubes can be effectively reduced to achieve the desired electrical conductivity, costs is reduced, and material processing property can be improved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to an epoxy-based ionic liquid / multi-wall carbon nanotube / polymer composite material and a preparation method thereof. Background technique [0002] Due to the excellent properties of polymer materials, more and more attention has been paid to them, and they have been rapidly developed and widely used. Conductive polymer materials are mainly divided into two categories: composite type and structural type. Among them, composite conductive polymer materials have been widely used in electronics, chemical industry, energy, aerospace and other fields, and are recognized as the most promising conductive polymer materials. one of the materials. For composite conductive polymer materials, in order to make the conductive filler form a complete conductive network structure in the matrix, the conductive filler needs to reach a certain concentration to play a role. When the amount of conductiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K7/24C08K5/1515C07D405/06
CPCC07D405/06C08K5/1515C08K7/24C08K2201/001C08K2201/011C08L67/02
Inventor 吕雪刘闯孙树林
Owner CHANGCHUN UNIV OF TECH
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