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Preparation method of high-temperature resistant composite for carbon nano-tube

A carbon nanotube and composite material technology, applied in the field of carbon nanotube improvement, can solve the problems of weak impact and wear resistance, poor interface bonding performance, and low comprehensive mechanical properties, and achieve improved impact and wear resistance and high thermal conductivity , The preparation method is simple and efficient

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

AI Technical Summary

Problems solved by technology

However, in the prior art, only polytetrafluoroethylene, high-temperature-resistant resin and polyphenylene are simply blended, and at the same time, the mechanical properties of polytetrafluoroethylene and high-temperature-resistant resin reinforcement materials are relatively low
Therefore, after blending and preparing composite materials, there are disadvantages such as poor interfacial bonding performance, low comprehensive mechanical properties, and weak impact and wear resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing a carbon nanotube high temperature resistant composite material, characterized in that it specifically comprises the following steps:

[0018] (1) Surface modification of carbon nanotubes: Mix multi-walled carbon nanotubes and concentrated nitric acid at a volume ratio of 1:4, put them into a flask, heat and reflux for 2.5 hours, and perform vacuum filtration with a filter membrane with a pore size of 0.20 μm , putting the carbon nanotubes after suction filtration into a vacuum oven and drying at a controlled temperature of 120° C. for 3 hours;

[0019] (2) Electrostatic orientation treatment: the carbon nanotubes after the above treatment are put into a uniform electric field through a high-voltage conductive metal mesh composed of copper, aluminum and graphite in a weight ratio of 5:2:3 in the carbon nanotube air duct, and the carbon nanotubes The tube is twisted under the action of electrostatic force to complete the orientation in the uniform ...

Embodiment 2

[0024] A method for preparing a carbon nanotube high temperature resistant composite material, characterized in that it specifically comprises the following steps:

[0025] (1) Surface modification of carbon nanotubes: Mix multi-walled carbon nanotubes and concentrated nitric acid at a volume ratio of 1:4, put them into a flask, heat and reflux for 2.8 hours, and perform vacuum filtration with a filter membrane with a pore size of 0.23 μm , putting the carbon nanotubes after suction filtration into a vacuum oven and drying at a controlled temperature of 125° C. for 2.5 hours;

[0026] (2) Electrostatic orientation treatment: the carbon nanotubes after the above treatment are put into a uniform electric field through a high-voltage conductive metal mesh composed of copper, aluminum and graphite in a weight ratio of 5:2:3 in the carbon nanotube air duct, and the carbon nanotubes The tube is twisted under the action of electrostatic force to complete the orientation in the unifor...

Embodiment 3

[0031] A method for preparing a carbon nanotube high temperature resistant composite material, characterized in that it specifically comprises the following steps:

[0032] (1) Surface modification of carbon nanotubes: Mix multi-walled carbon nanotubes and concentrated nitric acid at a volume ratio of 1:4, put them into a flask, heat and reflux for 3 hours, and perform vacuum filtration with a filter membrane with a pore size of 0.25 μm. Put the filtered carbon nanotubes into a vacuum oven and dry at a controlled temperature of 130°C for 2 hours;

[0033] (2) Electrostatic orientation treatment: the carbon nanotubes after the above treatment are put into a uniform electric field through a high-voltage conductive metal mesh composed of copper, aluminum and graphite in a weight ratio of 5:2:3 in the carbon nanotube air duct, and the carbon nanotubes The tube is twisted under the action of electrostatic force to complete the orientation in the uniform electric field, and falls in...

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Abstract

The invention discloses a preparation method of a high-temperature resistant composite for a carbon nano-tube. The preparation method is characterized by concretely comprising the following steps: (1) carrying out surface modification treatment on the carbon nano-tube; (2) carrying out electrostatic orientation treatment; (3) preparing a ternary mixture; (4) preparing a blend by virtue of ultrasonic treatment; and (5) preparing the composite. According to the preparation method disclosed by the invention, as concentrated nitric acid is adopted to carry out surface modification treatment on the carbon nano-tube, the carbon nano-tube is facilitated to generate good orientation under the condition of electrostatic force to obtain the composite which is doped with the oriented carbon nano-tube and in arbitrary thickness; by virtue of the ternary mixture, the composite is high in the thermal conductivity to be 4.3mW / mg and excellent in heat storage characteristic and has the maximum enthalpy value reaching up to 233.5mA.cm<-2>; by virtue of a polyphenyl ester ethanol solution modified composite, the impact abrasion resistance is greatly improved; and the preparation method is simple and efficient, and the composite is wide in applicability.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube improvement, and in particular relates to a preparation method of a carbon nanotube high temperature resistant composite material. Background technique [0002] Carbon nanotubes, which are tubular substances with a diameter of nanometers, are formed by curling graphite sheets according to a certain helix 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. [0003] Since carbon nanotubes have strong linear characteristics, their orientation in the matrix directly affects the properties of the prepared composite materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L67/03C08K13/06C08K9/02C08K9/00C08K3/22C08K3/34
Inventor 刘泽华
Owner QINGDAO ZHONGTIAN XINDA BIOTECH R & D
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