Preparation method of carbon nanotube dispersed in ionic liquid and application thereof

A technology of ionic liquids and multi-walled carbon nanotubes, applied in chemical instruments and methods, carbon compounds, bulk chemical production, etc., can solve the problems of limited practical application, force between macromolecules, and large specific surface area

Inactive Publication Date: 2017-03-15
TIANJIN AGRICULTURE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, MWNTs have a large specific surface area and a large intermolecular force between them, which seriously affects their uniform dispersion ability in water systems or most organic systems.
Generally, MWNTs exist in the state of entangled aggregates, which largely limits their practical applications in many fields.

Method used

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  • Preparation method of carbon nanotube dispersed in ionic liquid and application thereof
  • Preparation method of carbon nanotube dispersed in ionic liquid and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After vacuum drying choline chloride and urea at 40°C for 24 hours, weigh 90g of choline chloride and 120g of urea, and heat and melt them in a constant temperature oil bath at 85°C under magnetic stirring to form a colorless and transparent liquid. Choline-urea ionic liquid. Weigh 0.1 g of multi-walled carbon nanotubes and add them into the ionic liquid. After mixing evenly with magnetic stirring, add 0.3 mL of OP emulsifier, and ultrasonically oscillate for 1 hour to obtain a uniformly dispersed suspension of multi-walled carbon nanotubes. After the suspension was placed for 3 days, it can still maintain a stable dispersion, such as figure 1 shown. The particle size distribution of multi-walled carbon nanotubes in the suspension is as follows figure 2 shown.

Embodiment 2

[0022] After drying choline chloride, malonic acid and oxalic acid in vacuum at 30°C for 24 hours, weigh 80g of choline chloride, 60g of malonic acid and 20g of oxalic acid, heat and melt in a constant temperature oil bath at 85°C to form a colorless and transparent The liquid is the choline chloride-malonic acid-oxalic acid ionic liquid. Weigh 0.5 g of multi-walled carbon nanotubes and add them into the ionic liquid. After mixing evenly by magnetic stirring, add 1 g of sodium dodecylbenzenesulfonate and ultrasonically vibrate for 2 hours to obtain a uniformly dispersed suspension of multi-walled carbon nanotubes.

Embodiment 3

[0024] The preparation of choline chloride-malonic acid-oxalic acid ionic liquid is the same as that in Example 2. Weigh 1.5 g of multi-walled carbon nanotubes and add them to the ionic liquid. After mixing evenly with magnetic stirring, add 1 mL of Tween 80 and 0.05 g of sodium dodecylsulfonate, and ultrasonically shake for 2 hours to obtain uniformly dispersed multi-walled carbon nanotubes in suspension. liquid.

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Abstract

The invention relates to a preparation method for enhancing dispersity of multiwalled carbon nanotube in an ionic liquid and application thereof. The method for preparing uniformly dispersed multiwalled carbon nanotube suspension comprises the following steps: using a choline chloride-based ionic liquid as a solvent, mixing multiwalled carbon nanotube and the solvent in proportion, adding a small amount of an additive, heating and dissolving, and carrying out ultrasonic treatment. The invention aims to enhance dispersity of the multiwalled carbon nanotube in the choline chloride-based ionic liquid. The technology of the invention is simple and green and environment friendly. By the technology, the structure of the multiwalled carbon nanotube is basically not destroyed, and stability of the multiwalled carbon nanotube dispersion liquid is good. The invention is especially suitable for preparation a metal-based composite material from the multiwalled carbon nanotube and metal ion in the ionic liquid.

Description

[0001] Technical field: [0002] The invention relates to the field of dispersion of carbon nanotubes, in particular to a physical dispersion method of multi-walled carbon nanotubes and its application in composite materials. [0003] Background technique: [0004] Multi-walled carbon nanotubes (MWNTs for short), because of their unique nanostructure and excellent mechanical, electrical, magnetic and thermal properties, have shown good potential in many fields such as electrode materials, nanoelectronic materials, structural materials and high-performance composite materials. Application prospects. However, MWNTs have a large specific surface area and a large intermolecular force between them, which seriously affects their uniform dispersion ability in water systems or most organic systems. Generally, MWNTs exist in the state of entangled aggregates, which largely limits their practical applications in many fields. At present, there are many methods for dispersing carbon nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/174
CPCC01P2004/62Y02P20/54
Inventor 卜路霞徐彦军王晓霞
Owner TIANJIN AGRICULTURE COLLEGE
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