Technology for preparing nano-carbon tube-silica dioxide gel glass

A technology of carbon nanotubes and gel glass, applied in the field of material chemistry, can solve problems affecting the performance of carbon nanotubes, easy to agglomerate, and detachment

Inactive Publication Date: 2008-05-21
FUZHOU UNIVERSITY
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Problems solved by technology

However, in most of these composites, carbon nanotubes are physically blended with other components, especially inorganic metals or nonmetals, without any chemical bonding between carbon nanotubes and these components.
In this case, the high specific surface area of ​​carbon nanotubes makes them easy to agglomerate in the matrix, making it difficult to achieve com

Method used

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  • Technology for preparing nano-carbon tube-silica dioxide gel glass
  • Technology for preparing nano-carbon tube-silica dioxide gel glass
  • Technology for preparing nano-carbon tube-silica dioxide gel glass

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Embodiment

[0022] (1) Carboxylation of carbon nanotubes: reflux 1 g of carbon nanotubes with 80 ml of concentrated nitric acid at 120° C. for 12 hours, wash and filter with distilled water. Because the solvent is concentrated nitric acid, a polytetrafluoroethylene microporous membrane that can withstand strong acids is used for filtration. Wash and filter several times until the pH of the filtrate is about 7. The solid was dried under vacuum at 40°C for 24 hours, and ground into powder for later use. After the above treatment, CNTs-COOH was obtained.

[0023] (2) Acyl chlorination of carbon nanotubes: combine CNTs-COOH obtained in step 1 with 30ml thionyl chloride (SOCl 2 ) was refluxed at 80° C. for 24 hours. Anhydrous calcium chloride (CaCl 2 ) placed at the air interface of the condenser tube to prevent the intrusion of moisture, as shown in Figure 1. The excess SOCl was removed by distillation under reduced pressure 2 It is directly removed from the system to prevent the CNTs a...

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Abstract

The invention provides a carbon nano-tube-silicon dioxide gel glass preparation technology. On the basis of adopting three steps of carboxylic acidification, acyl chlorination and amidation for the surface modification of CNTs and realizing the covalent bonding of CNTs and APTES, the technology adopts a sol-gel process and introduces the sol-gel process into the silicon dioxide gel glass. During a hydrolysis-polycondensation process, TEOS, GPTMS and CNTs-APTES of precursor are hydrolyzed respectively and form into a silicon dioxide three-dimensional network structure through the polycondensation. And CNTs is chemically bonded into the silicon dioxide network by means of APTES. The even distribution in silicon dioxide gel glass matrix is realized. An agglomeration problem of the carbon nano-tube in the matrix is solved fundamentally. And the application background of the carbon nano-tube is further developed.

Description

technical field [0001] The invention belongs to the field of material chemistry, and more specifically relates to a preparation technology of carbon nanotube-silica gel glass. Background technique [0002] The discovery of carbon nanotubes in 1991 greatly promoted the development of nanomaterials and nanoscience. Its unique structure and many strange properties brought about by it have aroused widespread interest of scientists. From a structural point of view, carbon nanotubes are seamless nanoscale tubular crystals formed by single-layer or multi-layer graphite sheets curled around the central axis at a certain helical angle. Each carbon atom is hybridized with three surrounding carbon atoms through sp2 Completely bonded to form a cylindrical surface. This quasi-one-dimensional ideal nanostructure makes it close to the highest theoretical strength of natural materials, hundreds of times larger than steel, and its specific gravity is only one-sixth of steel. At the same t...

Claims

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Application Information

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IPC IPC(8): C03B8/02C03C3/04C03C4/02
Inventor 詹红兵郑婵黄娟冯苗
Owner FUZHOU UNIVERSITY
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