A kind of preparation method of carbon nanotube and resin composite material

A technology of resin composite 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 enhanced thermal conductivity and electrical properties, ease of processing conditions, and high resin quality

Active Publication Date: 2018-09-25
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 resin polymer in the composite material, making the composite material thus prepared basically unusable

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0022] The preparation method of the present invention specifically comprises the following steps:

[0023] 1. Preparation of catalyst powder

[0024]Take a salt solution of transition metals such as iron, nickel, cobalt, such as nitrate, and add a strong wave-absorbing carrier with an average particle size of 10 to 500 nm, the wave-absorbing carrier is selected from silicon carbide, barium strontium titanate, nitride Nano-powder of silicon and ferrite, stir evenly, add sodium borohydride or other reducing agents, and load the transition metal on the wave-absorbing carrier. The reacted liquid is filtered, washed and dried to obtain the catalyst powder. The catalyst powder can also be obtained commercially directly.

[0025] 2. Preparation of resin mixture with catalyst powder evenly distributed

[0026] Add the catalyst powder prepared in step 1 into the uncured resin, stir and disperse for 10-60 minutes, then add the curing agent, stir evenly, pour it into the pre-prepared...

Embodiment 1

[0030] 1. Preparation of catalyst powder

[0031] Add 5g of silicon carbide carrier with an average particle size of 200nm into the ferric nitrate solution, stir evenly, add reducing agent sodium borohydride, and load iron on the wave-absorbing carrier silicon carbide. The reacted substance is filtered, washed and dried to obtain catalyst powder.

[0032] 2. Preparation of resin mixture with catalyst powder evenly distributed

[0033] Take 4.6g of the catalyst powder prepared in step 1 and add it to 65.4g of epoxy resin, stir and disperse for 10-60min, then add an appropriate amount of resin curing agent, stir evenly, pour it into the pre-prepared and preheated mold, Heat curing at 150° C. for 2 hours to prepare a resin material in which the catalyst powder is evenly distributed.

[0034] 3. In situ growth of carbon nanotubes in resin materials

[0035] Put the cured mixture prepared in step 2 in a microwave oven, under the combined action of 0.8kw microwave heating and cat...

Embodiment 2

[0037] 1. Preparation of catalyst powder

[0038] Add 10 g of strontium barium titanate carrier with an average particle size of 240 nm into the nickel nitrate solution, stir evenly, add reducing agent sodium borohydride, and load nickel on the wave absorbing carrier barium strontium titanate. The reacted substance is filtered, washed and dried to obtain catalyst powder.

[0039] 2. Preparation of resin mixture with catalyst powder evenly distributed

[0040] Take 6g of the catalyst powder prepared in step 1 and add it to 48g of epoxy resin, then add 26g of nylon 66, stir and disperse for 10-60min, then add an appropriate amount of resin curing agent, stir evenly, pour into the pre-prepared and preheated In the mold, heat-cure at 120° C. for 3 hours to obtain a resin material in which the catalyst powder is evenly distributed.

[0041] 3. In situ growth of carbon nanotubes in resin materials

[0042] Put the cured mixture prepared in step 2 in a microwave oven. Under the co...

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Abstract

The invention provides a preparation method of a CNT (Carbon Nanotube) and resin composite material. The preparation method comprises the following steps: uniformly mixing catalyst powder with active component transition metal on a wave absorbing carrier, resin and a curing agent of the resin, thus obtaining a mixture; carrying out curing formation on the mixture; then putting the mixture which is subjected to the curing formation in microwave equipment for heating. The preparation method is characterized in that microwaves are absorbed by the wave absorbing carrier, and local high temperature is formed on the catalyst powder, so that CNTs are formed by resin in the place through in-situ growth; during microwave processing, the whole temperature of the mixture is maintained to be lower, so that partial resin in the mixture cannot be carbonized, and an obtained product is the CNT and resin composite material. According to the preparation method provided by the invention, not only is the problem that the CNTs are difficult to disperse in a resin matrix solved, but also the problem about the combination tightness between the resin and the CNTs is solved; meanwhile, in the prepared CNT and resin composite material, the quality of the resin is high, and compared with the resin matrix, the mechanical performance, the heat conduction performance and the electrical performance of the obtained CNT and resin composite material are enhanced to a large extent.

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 resin 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 mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K7/24C08K3/04C08J3/28
CPCC08J3/28C08J2363/00C08K3/04C08K7/24C08K2201/011C08L63/00
Inventor 阳鹏飞柯国军李德华宋百姓张琳
Owner NANHUA UNIV
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