Method for efficiently dispersing modified carbon nano tubes

A technology of carbon nanotubes and nanotubes, which is applied in the field of high-efficiency dispersion of modified carbon nanotubes, can solve problems such as thermodynamic instability, inability to disperse carbon nanotubes, and affect the application of carbon nanotubes, achieve a thorough dispersion effect, and improve interface interaction function, the effect of good dispersibility

Inactive Publication Date: 2015-06-03
QINGDAO ZHONGTIAN XINDA BIOTECH R & D
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the strong intertube van der Waals attraction between carbon nanotubes and the extremely high surface energy of carbon nanotubes, they are in a thermodynamically unstable state, and carbon nanotubes are mostly in the form of bundles of a large number of single carbon nanotubes side by side. The presence of carbon nanotubes makes it almost impossible to disperse in all solvents, which greatly affects the practical application of carbon nanotubes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for highly efficient dispersion of modified carbon nanotubes, characterized in that it specifically comprises the following steps:

[0017] (1) Carbon nanotube pretreatment: In a closed anti-corrosion kettle, take carbon nanotubes and concentrated nitric acid according to the weight ratio of 10:3, activate the anti-corrosion kettle in an oven with a temperature of 120°C for 5 hours, wash with water, and vacuum at 65°C dry suction filtration;

[0018] (2) Preparation of carbon nanotube dispersion: mix absolute ethanol and 30wt% hydrogen peroxide at a weight ratio of 1:1, add 8% carbon nanotubes, and process in an ultrasonic environment with an ultrasonic frequency of 30kHz and 100W for 2.5h ;

[0019] (3) Graphene dispersion: Dissolve graphene and diphenolic propane type epoxy resin in absolute ethanol according to the weight ratio, and ultrasonically disperse for 35 minutes under the conditions of ultrasonic frequency 20KHz and ultrasonic power 100W;

[0020]...

Embodiment 2

[0023] A method for highly efficient dispersion of modified carbon nanotubes, characterized in that it specifically comprises the following steps:

[0024] (1) Carbon nanotube pretreatment: In a closed anti-corrosion kettle, take carbon nanotubes and concentrated nitric acid according to the weight ratio of 10:4, activate the anti-corrosion kettle in an oven with a temperature of 125°C for 4.5h, wash with water, and store at 65°C Vacuum drying and suction filtration;

[0025] (2) Preparation of carbon nanotube dispersion: mix absolute ethanol and 30wt% hydrogen peroxide at a weight ratio of 1:1, add 9% carbon nanotubes, and process in an ultrasonic environment with an ultrasonic frequency of 31kHz and 100W for 2.3h ;

[0026] (3) Graphene dispersion: Dissolve graphene and diphenolic propane type epoxy resin in absolute ethanol according to the weight ratio, and ultrasonically disperse for 30 minutes under the condition of ultrasonic frequency of 23KHz and ultrasonic power of ...

Embodiment 3

[0030] A method for highly efficient dispersion of modified carbon nanotubes, characterized in that it specifically comprises the following steps:

[0031] (1) Carbon nanotube pretreatment: In a closed anti-corrosion kettle, take carbon nanotubes and concentrated nitric acid according to the weight ratio of 10:4, activate the anti-corrosion kettle in an oven at 130°C for 4 hours, wash with water, and vacuum at 65°C dry suction filtration;

[0032] (2) Preparation of carbon nanotube dispersion: mix absolute ethanol with 30wt% hydrogen peroxide at a weight ratio of 1:1, add 10% carbon nanotubes, and process for 2 hours in an ultrasonic environment with an ultrasonic frequency of 32kHz and 100W;

[0033] (3) Graphene dispersion: Dissolve graphene and diphenolic propane type epoxy resin in absolute ethanol according to the weight ratio, and ultrasonically disperse for 25 minutes under the condition of ultrasonic frequency of 25KHz and ultrasonic power of 100W;

[0034] (4) Materi...

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Abstract

The invention discloses a method for efficiently dispersing modified carbon nano tubes. The method is characterized by specifically comprises the following steps: (1) preprocessing the carbon nano tubes; (2) preparing a carbon nano tube dispersing solution; (3) preparing a graphene dispersing solution; and (4) enabling phase change of the materials; (5) preparing a graphene / carbon nano tube dispersing agent. According to the method, the carbon nano tubes are preprocessed; the acid mist generated at high temperature is used for etching the carbon tubes, so that the carbon tubes are high in dispersing performance, and the fusion with graphene in later period is ensured; the carbon nano tube are ultrasonically processed under the effects of absolute ethyl alcohol and hydrogen peroxide, so that the dispersing effect is completely achieved, and the carbon nano tubes can be produced as mass; graphene and epoxy resin are ultrasonically processed through absolute ethyl alcohol, and therefore, an uniformly-dispersed multi-layer graphene ethyl alcohol solution can be obtained; after the phase change of the graphene / carbon nano tube composition material, the interfacial interaction of graphene and the carbon nano tubes can be improved, and the effect of an interfacial compatibilizer can be achieved.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotubes, and in particular relates to a method for efficiently dispersing modified carbon nanotubes. Background technique [0002] Carbon nanotubes are tubular substances with a diameter of nanometers, which are formed by curling graphite sheets according to a certain helical angle by using electric arc, laser and other technologies. It has a very large aspect ratio, excellent physical properties, and its tensile strength is 100 times that of steel. The heat exchange performance along the length direction is high, while the heat exchange performance in the vertical direction is relatively low. Through proper orientation, carbon nanotubes can synthesize highly anisotropic heat conduction materials. Adding a small amount is an ideal additive material to improve the physical properties of rubber, plastics and chemical industries, and has a very broad application prospect. However, due to the stron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F3/12
Inventor 刘泽华
Owner QINGDAO ZHONGTIAN XINDA BIOTECH R & D
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