Method for dispersion of multi-walled carbon nanotubes

A multi-walled carbon nanotube and dispersion technology, applied in the nanometer field, can solve problems such as waste, and achieve the effects of small size, good water solubility, and improved compatibility

Inactive Publication Date: 2019-12-31
HANGZHOU GAOXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the polyimide industrial waste is now treated as garbage, which is very wasteful

Method used

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  • Method for dispersion of multi-walled carbon nanotubes
  • Method for dispersion of multi-walled carbon nanotubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Choose carbonized polyimide film at 1300°C as the positive electrode material, immerse in 0.01mol / L ammonium sulfate electrolyte, and conduct electrolysis at a voltage of 10V for 1h;

[0018] Through the above steps, the graphene carbon dots dispersed in the electrolytic solution are obtained, ammonium sulfate is removed by dialysis, and the graphene carbon dot dispersion liquid with an oxygen content of 10% is obtained. Mix 400mL, 0.2mg / mL graphene carbon dots and 300mg multi-walled carbon nanotubes in a beaker, then place the beaker in an ultrasonic machine with an ultrasonic power of 400W, and stir with a stirring paddle at a speed of 100rmp. After 2 hours, excess carbon dots were filtered off, and undispersed multi-walled carbon nanotubes were removed to obtain a carbon tube dispersion concentration of 0.4 mg / mL. The carbon tube solution and graphene oxide are compounded and made into fibers, which can be used as supercapacitors, and the mass specific capacity can r...

Embodiment 2

[0022] Choose 800°C carbonized polyimide film as the positive electrode material, immerse in 0.05mol / L ammonium chloride electrolyte, and perform electrolysis at a voltage of 3V for 10h;

[0023] Through the above steps, the graphene carbon dots dispersed in the electrolytic solution are obtained, ammonium chloride is removed by dialysis, and the graphene carbon dot dispersion liquid with an oxygen content of 20% is obtained. Mix 400mL, 0.2mg / mL graphene carbon dots and 300mg multi-walled carbon nanotubes in a beaker, then place the beaker in an ultrasonic machine with an ultrasonic power of 270W while stirring with a stirring paddle at a speed of 50rmp. After 2 hours, excess carbon dots were filtered off, and undispersed multi-walled carbon nanotubes were removed to obtain a carbon tube dispersion concentration of 0.6 mg / mL. The carbon tube solution and graphene oxide are compounded and made into fibers, which can be used as supercapacitors, and the mass specific capacity can...

Embodiment 3

[0025] Choose carbonized polyimide film at 2200°C as the positive electrode material, immerse in 0.01mol / L ammonia water electrolyte, and conduct electrolysis at a voltage of 5V for 24 hours;

[0026] Through the above steps, the graphene carbon dots dispersed in the electrolytic solution are obtained, the ammonia water is removed by evaporation, and the graphene carbon dot dispersion liquid with an oxygen content of 40% is obtained. Mix 400mL, 0.2mg / mL graphene carbon dots and 400mg multi-walled carbon nanotubes in a beaker, then place the beaker in an ultrasonic machine with an ultrasonic power of 350W and stir with a stirring paddle at a speed of 60rmp. After 2 hours, excess carbon dots were filtered off, and undispersed multi-walled carbon nanotubes were removed to obtain a carbon tube dispersion concentration of 0.8 mg / mL. The carbon tube solution and graphene oxide are compounded and made into fibers, which can be used as supercapacitors, and the mass specific capacity c...

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Abstract

The invention discloses a method for dispersion of multi-walled carbon nanotubes. The method utilizes a large number of cheap graphene carbon dots to disperse multi-walled carbon nanotubes, the oxygencontent of the graphene carbon dots is adjustable, therefore when the graphene carbon dots are used for dispersing multi-walled carbon nanotubes, the dispersion concentration can be adjusted between0.4mg / mL and 0.8mg / mL. The method selects vitrifiable polyimide, polyacrylonitrile, asphalt and other carbon industrial waste as the anode raw materials, which are subjected to electrolysis by clean electrochemical method for efficient preparation of graphene carbon dots. Moreover, the aforementioned vitrifiable industrial waste is prepared in large scale along with the production of industrial products at present, the price is low, and the preparation cost of the graphene carbon dots is reduced. The graphene carbon dots and the multi-walled carbon nanotubes are carbon in nature, so that the problem of compatibility between a dispersing agent and a dispersed body can be solved by using the hydrophilic graphene carbon dots to disperse the hydrophobic multi-walled carbon nanotubes.

Description

technical field [0001] The invention belongs to the field of nanotechnology, in particular to a method for dispersing multi-walled carbon nanotubes. Background technique [0002] Carbon nanotubes are one-dimensional nanomaterials with outstanding aspect ratio, good chemical stability and high electrical conductivity. And carbon nanotubes have excellent mechanical properties, including high elastic modulus, good toughness, and strength 100 times that of steel, so carbon nanotubes are very suitable as fillers for polymer composites or carbon composite materials, and can improve the conductivity of composite materials. While improving the performance and mechanical properties, it can also reduce the weight of composite materials. Carbon nanotube-based composite materials can bring broad prospects for applications such as supercapacitors, lithium-ion batteries, and catalyst supports. [0003] However, carbon nanotubes are extremely hydrophobic and have few heteroatoms on the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25B1/00
Inventor 高超黄昊光彭蠡
Owner HANGZHOU GAOXI TECH CO LTD
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