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Preparation method of stable aligned carbon nanotube-reinforced composite material

A technology for reinforcing composite materials and carbon nanotubes, which is applied in the field of preparation of stable oriented carbon nanotube-reinforced composite materials, can solve the problems of difficult dispersion of carbon nanotubes, poor interface bonding performance, etc., achieves a good degree of orientation and increases the reaction. Activity, the effect of improving dispersibility and stability

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

At present, carbon nanotubes are mostly added to the unsaturated resin matrix by physical mixing. Although this method is simple, it is difficult to disperse carbon nanotubes in the matrix, and it is only physically combined with the matrix, and the interface bonding performance is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method for a stable oriented carbon nanotube reinforced composite material, characterized in that it specifically comprises the following steps:

[0018] (1) Pretreatment of carbon nanotubes: take out carbon nanotubes and mix them with concentrated sulfuric acid at a weight ratio of 1:5, control the temperature at 85-95°C, and ultrasonically treat them for 50 minutes at a frequency of 70KHz, and then use a 0.2 μm diameter Suction filtration with microporous membrane, repeated washing with deionized water until neutral, and finally drying at 90°C for 7 hours, and grinding to powder;

[0019] (2) Magnetic treatment: the above-mentioned carbon nanotubes pass through the high-voltage cathode metal mesh in the carbon nanotube air duct and enter the uniform electric field, and the carbon nanotubes are twisted under the action of electrostatic force to complete the orientation in the uniform electric field and collect;

[0020] (3) Coating powder for aluminum pow...

Embodiment 2

[0024] A preparation method for a stable oriented carbon nanotube reinforced composite material, characterized in that it specifically comprises the following steps:

[0025] (1) Pretreatment of carbon nanotubes: take out carbon nanotubes and mix them with concentrated sulfuric acid at a weight ratio of 1:5, control the temperature at 85-95°C, and ultrasonically treat them for 53 minutes at a frequency of 70KHz, and then use a 0.3 μm diameter Suction filtration with microporous membrane, repeated washing with deionized water until neutral, and finally drying at 90°C for 7 hours, and grinding to powder;

[0026] (2) Magnetic treatment: the above-mentioned carbon nanotubes pass through the high-voltage cathode metal mesh in the carbon nanotube air duct and enter the uniform electric field, and the carbon nanotubes are twisted under the action of electrostatic force to complete the orientation in the uniform electric field and collect;

[0027] (3) Coating powder for aluminum pow...

Embodiment 3

[0031] A preparation method for a stable oriented carbon nanotube reinforced composite material, characterized in that it specifically comprises the following steps:

[0032] (1) Pretreatment of carbon nanotubes: take out carbon nanotubes and mix them with concentrated sulfuric acid at a weight ratio of 1:5, control the temperature at 95°C, and ultrasonically treat them for 50 minutes at a frequency of 70KHz, and then use micropores with a diameter of 0.4 μm Filter with filter membrane, wash with deionized water repeatedly until neutral, and finally bake at 90°C for 8 hours, and grind to powder;

[0033] (2) Magnetic treatment: the above-mentioned carbon nanotubes pass through the high-voltage cathode metal mesh in the carbon nanotube air duct and enter the uniform electric field, and the carbon nanotubes are twisted under the action of electrostatic force to complete the orientation in the uniform electric field and collect;

[0034] (3) Coating powder for aluminum powder: Ta...

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Abstract

The invention discloses a preparation method of a stable aligned carbon nanotube-reinforced composite material. The method is characterized by specifically comprising the following steps: (1) pretreatment of a carbon nanotube; (2) magnetic treatment; (3) preparation of aluminum coated powder; (4) preparation of reinforced carbon nanotube; and (5) preparation of the composite material. The carbon nanotube is firstly pretreated, and the prepared acidified carbon nanotube contains hydroxyl and carboxyl, so that the reaction activity of the carbon nanotube is greatly increased; the orientation degree of the carbon nanotube after magnetic treatment is good, so that obtaining of the doped aligned carbon nanotube composite material with any thickness by extrusion in the later period is facilitated; an ultrasonic dispersion technology is adopted by preparation of the aluminum coated powder, so that the agglomeration phenomenon is reduced, and the dispersity and the stability of the aluminum coated powder are improved; the tensile strength of the composite material of the carbon nanotube obtained by thermal extrusion is 43MPa, and the compression strength is 125MPa.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube composite materials, and in particular relates to a preparation method of a stable directional carbon nanotube reinforced composite material. 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. It has a large specific surface area and excellent thermal conductivity, good chemical stability, strong electrical conductivity, excellent mechanical pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/06C08K9/10C08K3/08C08K9/02C08K9/00C08K7/24C08G63/181
Inventor 刘泽华
Owner QINGDAO ZHONGTIAN XINDA BIOTECH R & D
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