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Preparation method of carbon nanotube-polymer composite material

A technology of polymer materials and carbon nanotubes, which is applied in the field of preparation of composite materials, can solve the problems of unusable composite materials and achieve the effects of easing the processing conditions, solving the combination tightness and uniform distribution

Active Publication Date: 2017-05-10
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above preparation methods, the composite material is prepared by in-situ synthesis of carbon nanotubes, but after the resin in the composite material obtained by the above preparation method is kept at a high temperature of about 1000°C for forming carbon nanotubes for a period of time, the The resin has basically been completely carbonized and decomposed, and there is no longer any polymer in the composite material, making the composite material thus prepared basically unusable

Method used

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Examples

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preparation example Construction

[0021] The preparation method of the present invention specifically comprises the following steps:

[0022] 1. Preparation of resin material with evenly distributed catalyst

[0023] Iron, nickel, cobalt and other transition metal catalyst powder, the average particle size is 10nm ~ 10um, add to epoxy resin, stir and disperse for 10 ~ 60min, then add curing agent, after stirring evenly, pour into the pre-prepared and preheated In the mold, curing is carried out under selected curing conditions to obtain a resin material in which the metal catalyst is evenly distributed.

[0024] 2. In situ growth of carbon nanotubes in resin materials

[0025] Put the molded mixed material prepared in step 1 in an induction heating furnace, turn on the induction heating furnace with a power of 0.1-30kw, the transition metal particles in the material are heated by induction, and the catalyst part generates a temperature of 500-1000°C within 0.1-600s. High temperature, under the combined actio...

Embodiment 1

[0027] 1. Preparation of resin material with uniform distribution of iron catalyst

[0028] Weigh 6g of iron powder with an average particle size of 100nm and 49g of epoxy resin E-51, stir and disperse evenly, then weigh 45g of nylon 651 and add it to form a mixture, after stirring evenly, pour the mixture into a mold coated with a release agent in a plastic mold. Heating to 150° C. for 2 h to obtain a cured mixture.

[0029] 2. In situ growth of carbon nanotubes in the resin

[0030] Put the cured mixture prepared in step 1 in an induction heating furnace, turn on the induction heating power of 2kw, and heat for 2s. A high temperature of about 800° C. is generated locally on the catalyst, and carbon nanotubes are grown in situ to obtain the carbon nanotube and polymer composite material.

Embodiment 2

[0032] 1. Preparation of resin material with evenly distributed cobalt catalyst

[0033] Weigh 2g of cobalt powder with an average particle size of 15nm and 63g of epoxy resin E-51, stir and disperse evenly, then weigh 35g of nylon 66 and add it to form a mixture. After stirring evenly, pour the mixture into a mold coated with a release agent. in a plastic mold. Heating to 170° C. for 3 h to obtain a cured mixture.

[0034] 2. In situ growth of carbon nanotubes in the resin

[0035] Put the cured mixture prepared in step 1 in an induction heating furnace, turn on the induction heating power of 3kw, and heat for 5s. A high temperature of about 900° C. is generated locally on the catalyst, and carbon nanotubes are grown in situ to obtain the carbon nanotube and polymer composite material.

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Abstract

The invention provides a preparation method of a carbon nanotube-polymer composite material. The method comprises the following steps: uniformly mixing a catalyst transition metal powder and an organic high-molecular polymer material to obtain a mixture, carrying out curing formation on the mixture, and heating the formed mixture in magnetic induction heating equipment. Partial high temperature is formed on the transition metal powder surface, so that the polymer material in the mixture grows in situ in the catalyst position to form carbon nanotubes; and the obtained product is the carbon nanotube-polymer composite material. The method solves the problem of difficulty in dispersion of CNTs (carbon nanotubes) in the polymer matrix, and also solves the problem of combination tightness between the polymer and CNTs. The prepared composite material has high resin mass; and the mechanical properties, heat-conducting property and electric properties of the obtained composite material are greatly enhanced as compared with the polymer matrix.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a preparation method of carbon nanotube and polymer composite material. Background technique [0002] The distance between carbon nanotube layers is about 0.34nm, and its diameter is generally in the range of nanometers, and its length is tens of nanometers, and the longest can reach several microns. The C=C covalent bond formed by 2sp hybridization is one of the strongest valence bonds in nature, which endows carbon nanotubes with excellent mechanical properties; With unpaired electrons, carbon nanotubes have excellent electrical properties. In addition, carbon nanotubes also have excellent thermal conductivity, magnetic and optical properties and unique wave-absorbing properties. With its unique electronic structure and physical and chemical properties, carbon nanotubes are considered to be a new type of structural material and functional ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K7/24
CPCC08K7/24C08K2201/011C08L63/00
Inventor 阳鹏飞柯国军李德华邹品玉赵海东张琳
Owner NANHUA UNIV
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