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Silicon oxide coating nano carbon composite material and preparation method thereof

A composite material and nanocarbon technology, which is applied in the treatment of dyed organosilicon compounds, fibrous fillers, etc., can solve the problems of sacrificing the electrical and mechanical properties of carbon nanotubes, and achieve the effect of easy commercial application.

Inactive Publication Date: 2011-08-24
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, so far there is no method for efficiently synthesizing a large number of silica-coated carbon nanotube coaxial fibers with uniform structure without sacrificing the electrical and mechanical properties of carbon nanotubes themselves.

Method used

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  • Silicon oxide coating nano carbon composite material and preparation method thereof
  • Silicon oxide coating nano carbon composite material and preparation method thereof

Examples

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Effect test

example 1

[0024] After mixing ethanol and ferrocene at a mass ratio of 80:1, inject it at a rate of 7ml / h until the temperature is 1150°C, with 600ml / min H 2 In the airflow reactor, 100mg of dimethyl polysilicone resin (thermal decomposition rate mass fraction: 80%, viscosity: 2000mPa.s, 20°C) was introduced into the above reactor for pyrolysis, and a pure white flocculent was grown in the reactor. product. Electron microscope observation shows that it is a carbon nanotube structure coated with silicon oxide, and the thickness of the silicon oxide coating layer is 30nm (Fig. 2, Fig. 3).

example 2

[0026] In this example, on the basis of Example 1, different organosiloxanes and dimethyl silicone oil (the mass fraction of thermal decomposition rate is 90%) are used. The specific experimental steps are the same as in Example 1, and a large amount of gray flocculent products are grown in the reactor. Electron microscope observation shows that the products are carbon nanotube structures coated with silicon oxide, and the thickness of the silicon oxide coating layer is 50nm.

example 3

[0028] This example uses different organosiloxanes on the basis of Example 1; tetraethoxysilane (the mass fraction of thermal decomposition rate is 95%). The specific experimental procedure was the same as in Example 1, and a large amount of gray cotton-like products were grown in the reactor. Electron microscope observation shows that the products are carbon nanotube structures coated with silicon oxide, and the thickness of the silicon oxide coating layer is 50nm.

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Abstract

The invention discloses nano-carbon composite material which is coated by silicon oxide and a process for preparation, which utilizes nano-carbon basal body and organo-silicone to be raw material, and the organo-silicone is separated in high temperature on the nano-carbon basal body in gas phase to deposit and coat silicon oxide, the thickness of silicon oxide layer on a single nano-carbon tube can be led to be 5-300nm through controlling a reacting condition. The carbon basal body is nano carbon, which comprises nano-carbon fiber and a nano-carbon tube, and the diameter is between 1nm and 500 nm. The specific process for preparation comprises producing nano carbon in air current, quickly separating the organo-silicone in high temperature in the air current which contains nano carbon, andthe pyrolysis temperature is between 600 DEG C and 1500 DEG C. The invention is a process which can quickly control to synthesize a large amount of coaxial nano fibers whose structures are even. The invention has the advantages of simple, high effective, high yield rate and the like.

Description

technical field [0001] The invention relates to the field of preparation of carbon nanotube composite materials, in particular to a silicon oxide-coated carbon nanotube composite material and a method for preparing silicon oxide-coated carbon nanotube coaxial fibers. Background technique [0002] Coaxial fibers of high mechanical strength and conductivity one-dimensional carbon nanotubes coated with photoactive and good biocompatibility electrically insulating silica have important potential in the fields of future optoelectronic devices, biosensors, and energy conversion. application. After silicon oxide is coated on the surface of carbon nanotubes, the field emission performance of carbon nanotubes can be significantly enhanced (W.K.Yi, T.Jeong, S.G.Yu, et al,, Adv.Mater., 2002, 14, p1464;), The carbon nanotube has selective gas-sensing properties, and can improve the high-temperature oxidation resistance of the carbon nanotube. Especially in the field of biological appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/44C09C3/12
Inventor 李亚利谯晓花侯峰钟小华梁田
Owner TIANJIN UNIV
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