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Preparation method of carbon nanotube composite material

A composite material and carbon nanotube technology, which is applied in the field of preparing carbon nanotube composite materials by vacuum filtration method, can solve the problems of affecting the mechanical properties of composite materials, inability to infiltrate resin uniformly, and low resin content, etc., so as to shorten the preparation cycle and shorten the Immersion time, improve the effect of infiltration

Inactive Publication Date: 2018-05-29
绍兴兆丽新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of a large number of nanoscale pores in the carbon nanotube film, the resin cannot be uniformly infiltrated in the carbon nanotube film, resulting in an excessively high overall resin content in the composite material, but the resin content in the thickness direction is very small, which seriously affects the mechanical properties of the composite material.

Method used

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  • Preparation method of carbon nanotube composite material
  • Preparation method of carbon nanotube composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Preparation method of high-strength carbon nanotube composite material

[0031] Assemble the vertical suction filtration equipment: connect a ceramic funnel with a diameter of 70 mm to the conical flask through a cork, connect the conical flask to the vacuum pump with a gas tube, seal the top of the funnel, and test the airtightness of the equipment to ensure that there is no air leakage.

[0032] The resin matrix of the composite material used in this example is epoxy resin (Guangzhou Hengyue Chemical Co., Ltd., brand: E-51), and the carbon nanotube film is a carbon nanotube film prepared by floating catalytic chemical vapor deposition.

[0033] The preparation method of carbon nanotube composite material in the present embodiment is as follows:

[0034] (1) Clean and wet the carbon nanotube film with acetone

[0035] Cut the carbon nanotube film into a circle with a diameter of 60 mm with a blade, and clean the surface impurities with acetone.

[0036] (2)...

Embodiment 2

[0044] Example 2 Preparation method of carbon nanotube film composite tension sensor

[0045] In this example, a composite material with high carbon nanotube content is prepared by vertical suction filtration method, and the composite material and the stressed structural member are fixed together. Under the action of tension, the resistance of the composite material increases linearly with the increase of strain, thus A carbon nanotube film composite tension sensor was prepared.

[0046]In this embodiment, polymethyl methacrylate (Mitsubishi, brand: 460) was selected as the resin matrix, and a carbon nanotube film prepared by floating catalytic chemical vapor deposition was used as the reinforcement.

[0047] The preparation method of carbon nanotube composite material in the present embodiment is as follows:

[0048] (1) Use acetone to clean and wet the carbon nanotube film:

[0049] Cut the carbon nanotube film into a circle with a diameter of 60 mm with a blade, and clean...

Embodiment 3

[0060] Example 3 Preparation method of high temperature resistant carbon nanotube composite material

[0061] The composite material resin matrix is ​​replaced by aviation resin such as bismaleimide resin (Suzhou Pinyu Optoelectronics Technology Co., Ltd., brand: PY8006T), which can benefit from the flame retardancy of carbon nanotubes and the high temperature resistance of BMI. Preparation of high temperature resistant carbon nanotube composites.

[0062] The preparation method of carbon nanotube composite material in the present embodiment is as follows:

[0063] (1) Use acetone to clean and wet the carbon nanotube film:

[0064] Cut the carbon nanotube film into a circle with a diameter of 60 mm with a blade, and clean the surface impurities with acetone.

[0065] (2) Configure resin solution

[0066] Bismaleimide resin (BMI) was diluted with acetone to 10 g of diluted resin mixture A with a viscosity of 2.5 mpa.s and 10 g of diluted resin mixture B with a viscosity of 4...

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Abstract

The invention provides a preparation method of a carbon nanotube composite material. The preparation method comprises following steps: (1), vacuum filtration: a carbon nanotube film is flatly laid onfilter paper, firstly, a resin solution with concentration being 0.1-20 mpa.s is dropwise added to the carbon nanotube film, vacuum filtration is performed for 1-60 min, a resin solution with concentration being 20-5000 mpa.s is dropwise added, vacuum filtration is performed until no obvious resin drops exist on the upper surface of the carbon nanotube film, and intensity of pressure in the vacuumfiltration process is controlled to be 0.01-1 MPa; (2), high-temperature pressure curing: the carbon nanotube film soaked with resin in the step (1) is taken out and subjected to high-temperature pressure curing formation; intensity of pressure is controlled to be 1-3 MPa, temperature is 50-220 DEG C, and curing time is 1-10 h. According to the preparation method, the resin directly permeates inthe thickness direction of the carbon nanotube film in the vacuum filtration process, so that soaking time is greatly shortened, soaking of the carbon nanotube with the resin is improved, high-contentcarbon nanotube reinforcement is contained in the composite material while the carbon nanotube is completed soaked and coated with the resin, and accordingly, the composite material has good mechanical property and thermoelectric performance.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube composite material, in particular to a method for preparing a carbon nanotube composite material by a vacuum filtration method. Background technique [0002] As a carbon nanotube aggregate with a self-supporting porous network structure, carbon nanotube film not only inherits the superior properties of single carbon nanotubes, but also has good electrical conductivity and electromagnetic shielding properties. In addition, the carbon nanotube film has a macroscopic size, which is more suitable for subsequent processing. It is regarded as an excellent high-performance composite material reinforcement and has a good application prospect. The carbon nanotube composite material prepared by using the carbon nanotube film to strengthen the thermosetting or thermoplastic resin has high strength, good flame retardancy, thermoelectric performance, and electrostatic shielding and other properties. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L33/12C08L79/08C08K7/24C08J3/20C08J3/205
CPCC08J3/20C08J3/205C08J2333/12C08J2363/00C08J2379/08C08K7/24C08K2201/011
Inventor 李宪强魏宝春李圆圆许福军张万虎
Owner 绍兴兆丽新材料科技有限公司
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