Carbon nano-pipe array/laminated composite and its production

A carbon nanotube array, layered material technology, applied in metal material coating process, coating, layered products and other directions, can solve the problems of carbon nanotube arrays that have not been reported, and achieves easy engineering scale-up and mass production. Effect

Active Publication Date: 2007-11-21
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows creating small amounts (usually on an order of 10 grams) of high purity single wall carbon nanoparticles that have unique structures made up from them. These particles consist mostly of sp2 bondings or other chemical bonds within each particle's surface area. They also contain specific types of atoms called cations along their edges. By combining these tiny parts together they make it possible to produce complex molecules like fullerenic rings. Overall this process makes making better quality carbon nanofilms more efficient than existing methods currently available at laboratory level.

Problems solved by technology

This patents describes methods for growing carbon nanorods called fulleran colloidal crystals, consisting mainly of multiple layers of carbon molecules arranged like threads around each other. These carbon nanoparticle aggregations result from interactions among themselves due to weak van der Wafer force during synthesis. They may form aligned networks within these aggregational units. By controllably depositing carbon nanoballs onto specific areas along the walls of the carbon microscope column, they become organized into larger assemblies containing numerous individual ones.

Method used

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  • Carbon nano-pipe array/laminated composite and its production
  • Carbon nano-pipe array/laminated composite and its production
  • Carbon nano-pipe array/laminated composite and its production

Examples

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preparation example Construction

[0024] The steps of the preparation method of the above-mentioned carbon nanotube array / layered material composite are: 1) making the precursor of the catalyst active component into a homogeneous solution, immersing the layered material carrier in the homogeneous solution, and drying it at 100~ Calcined at 500°C to form a catalyst with a structure in which the metal active components are distributed between the layered material carrier sheets; the active components of the catalyst are Fe, Co, Ni, Mo, W, Cu or rare earth elements, Wherein the active component accounts for 0.1% to 50% of the mass of the catalyst; the catalyst active component precursor is the nitrate, chloride or metallocene compound corresponding to the metal;

[0025] 2) The catalyst is placed in a reactor, and a carbon nanotube / layer material composite is prepared through a chemical vapor deposition process.

[0026] In the present invention, the chemical vapor deposition process uses methane, ethane, ethylen...

Embodiment 1

[0028] Example 1: A carbon nanotube array / layered material composite was prepared by using mica as a catalyst carrier through a fixed bed.

[0029] Mica is a natural layered material. Take 40.4g Fe(NO 3 ) 3 9H 2O was dissolved in 400ml of deionized water, and then 200g of mica was impregnated into the above solution. After being fully impregnated, the solution basically penetrates into the mica. The impregnated mica was then dried at 110 °C for 12 hr. Then it was calcined at 500° C. for 30 minutes and then cooled to form a catalyst with a structure in which the metal active component is distributed between the support sheets of the layered material, and the active component iron accounts for 2.8% of the mass fraction of the catalyst. Then take 1 g and place it in a fixed-bed reactor with a diameter of 30 mm and a length of 1200 mm, using argon and hydrogen as carrier gases with flow rates of 600 sccm and 20 sccm respectively. Under this atmosphere, the reaction temperatu...

Embodiment 2

[0031] Example 2: Using vermiculite as a catalyst carrier to prepare a carbon nanotube array / layered material composite through a fixed bed.

[0032] Vermiculite is a naturally layered material. Take 808g Fe(NO 3 ) 3 9H 2 O was dissolved in 400ml of methanol, and then 2kg of vermiculite was impregnated into the above solution. After being fully impregnated, the solution basically permeates between the vermiculites. Then the impregnated vermiculite was dried at 100° C. for 12 hours. Calcined at 450°C for 60 minutes and then cooled to a catalyst with a structure in which the metal active component is distributed between the support sheets of the layered material. The active component iron accounts for 5.6% of the mass fraction of the catalyst, and its appearance is shown in Figure 5. . A fixed bed with a diameter of 200mm and a length of 1000mm will be placed, and argon and hydrogen will be used as carrier gases with flow rates of 20000 sccm and 200 sccm respectively. Und...

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Abstract

The invention is concerned with the carbon nanometer pipe array / laminate compounds and the method of preparation: the compounds consist of the carbon nanometer pipe array and laminate, the carbon nanometer pipe array distributes between the slices of the laminate. The method of preparation is: the laminate is the catalyst carrier, the active ingredient of the catalyst carrier between the layers forms the catalyser, creates carbon nanometer pipe array between the layers by the precess of caemical vapor deposition, gets the carbon nanometer pipe array / laminate compounds. The invention abundances the species of the carbon nanometer pipe gathering structure, and also achieves volume production, pushes the carbon nanometer pipe application research.

Description

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Claims

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Application Information

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Owner TSINGHUA UNIV
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