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

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...

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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 complete and uniform dispersion in the matrix, and even easy to detach from the matrix, which seriously affects the performance of carbon nanotubes.

Although there have been reports on the chemical bonding of carbon nanotubes to polymer chains, there is no report on the chemical bonding of carbon nanotubes to the network structure of silica inorganic glass components

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