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Preparation method of composite powder of mullite precursor in situ enveloped carbon nanometer tube

A carbon nanotube composite and carbon nanotube technology is applied in the field of preparing nano-mullite precursor in-situ coated carbon nanotube composite powder, which can solve the problems of not getting satisfactory results and achieve the effect of simple process.

Inactive Publication Date: 2006-07-12
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Peigney and Kamalakaran et al. have done a lot of work on carbon nanotube / alumina composites, but still have not obtained satisfactory results

Method used

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  • Preparation method of composite powder of mullite precursor in situ enveloped carbon nanometer tube
  • Preparation method of composite powder of mullite precursor in situ enveloped carbon nanometer tube
  • Preparation method of composite powder of mullite precursor in situ enveloped carbon nanometer tube

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Effect test

Embodiment 1

[0030] The carbon nanotubes were baked in an oven at 100° C. for 24 hours to remove moisture in the carbon nanotubes, then refluxed in concentrated nitric acid for 24 hours, washed with deionized water, and dried. 5g of acidified carbon tubes were immersed in 2.0M aluminum ammonium carbonate aqueous solution, stirred on a magnetic stirrer after ultrasonic dispersion for 60 minutes, dripped with a concentration of 0.3M aluminum ammonium sulfate solution, reacted at room temperature for 12 hours, and then obtained The product was washed three times with water and absolute ethanol, and dried to obtain a composite powder of aluminum ammonium carbonate-wrapped carbon nanotubes. The obtained suspension was heated in a water bath at 55°C, and ethyl orthosilicate was dropped into it. React under low temperature for 12 hours to obtain a composite powder wrapped in ammonium aluminum carbonate and silicon oxide. The product is washed three times with water and absolute ethanol, and the co...

Embodiment 2

[0032] The carbon nanotubes were baked in an oven at 100° C. for 24 hours to remove moisture in the carbon nanotubes, then refluxed in concentrated nitric acid for 24 hours, washed with deionized water, and dried. 5g of acidified carbon tubes were immersed in 0.2M aluminum ammonium carbonate aqueous solution, ultrasonically dispersed for 15-60 minutes and then stirred on a magnetic stirrer, then dripped with a concentration of 0.1 aluminum ammonium sulfate solution, reacted at room temperature for 12 hours, and then Wash the obtained product three times with water and absolute ethanol, and dry to obtain a composite powder of carbon nanotubes wrapped in ammonium aluminum carbonate. React under neutral conditions for 12 hours to obtain a composite powder wrapped in ammonium aluminum carbonate and silicon oxide. The product is washed three times with water and absolute ethanol, and the composite powder obtained after drying is then calcined in air at 450°C for 2 hours. , that is,...

Embodiment 3

[0034] The carbon nanotubes were baked in an oven at 100° C. for 24 hours to remove moisture in the carbon nanotubes, then refluxed in concentrated nitric acid for 24 hours, washed with deionized water, and dried. Immerse 5g of acidified carbon tubes in 0.1M aluminum ammonium carbonate aqueous solution, ultrasonically disperse for 15-60 minutes, stir on a magnetic stirrer, drop into a solution of aluminum ammonium sulfate with a concentration of 0.015, react at room temperature for 12 hours, and then Wash the obtained product three times with water and absolute ethanol, and dry to obtain a composite powder of carbon nanotubes wrapped in ammonium aluminum carbonate. React under neutral conditions for 12 hours to obtain a composite powder wrapped in ammonium aluminum carbonate and silicon oxide. The product is washed three times with water and absolute ethanol, and the composite powder obtained after drying is then calcined in air at 450°C for 2 hours. , that is, a composite pow...

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Abstract

The invention provides a method of preparing composite powder through coating carbon nano-tube by mullite-predecessor. It is characterized by: put carbon nano-tube after surface working to aqueous solution to synthesize composite powder of carbon nano-tube-ammonium aluminum carbonate-silicon oxide sol, wash, dry, riddle and burn it to get composite powder of carbon nano-tube coated by mullite-predecessor. The construction feature is: the mollite-predecessor is on the wall of carbon nano-tube which could accomplish total coating to carbon nano-tube in optimum condition. We could get composite powder of carbon nano tube-mollite predecessor with different ratio through controlling solution strength. The convention accomplishes the tight bond of mollite predecessor and carbon nano tube in the way of original position coating synthesis, which is an effective approach of preparing carbon nano tube / mollite composite material. Said composite material is the predecessor of preparing carbon nano tube / mollite composite material, also, could be used as reinforced body of other material with wide application prospect.

Description

technical field [0001] The invention relates to a method for preparing a nano-mullite precursor in-situ-coated carbon nanotube composite powder, and belongs to the field of nano-composite materials. technical background [0002] Since the discovery of carbon nanotubes by S. Iijima, research on carbon nanotubes and related science has attracted great attention. Because it has a unique one-dimensional hollow structure, super electrical and mechanical properties, large specific surface area (120-300m 2 / g), good adsorption capacity, carbon nanotubes and their composite materials can be widely used as reinforcements of composite materials, hydrogen storage materials, field emission materials, nano-devices and electrode materials. In particular, its excellent mechanical properties (the elastic modulus of single-walled carbon nanotubes is 1TPa, and the elastic modulus of multi-walled carbon nanotubes is 950GPa) and low density are known as the limit form of composite material rei...

Claims

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Application Information

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IPC IPC(8): C04B35/52C04B35/185C04B35/622
Inventor 王静寇华敏潘裕柏郭景坤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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