Carbon nanotube composite structure with silicon dioxide nano particles and silver nanoparticles

Abstract

The invention provides a carbon nanotube composite structure with silicon dioxide nano particles and silvernanoparticles. The carbon nanotube composite structure is high in moisture retention and high in sterilization performance and comprises a modified multi-wall carbon nanotube (MWCNT) and an adhesion layer with polarity, wherein carbon groups of benzene rings of the modified multi-wall carbon nanotube are bonded with functional groups such as COOH, OH and SO, so that the modified multi-wall carbon nanotube is a nanostructure with negative charge on the surface; the charge on the surface of the adhesion layer is adhered to the modified multi-wall carbon nanotube; the adhesion layer contains multiple SiO2@EDAS nanoparticles and multiple Ag@Citrate nanomolecules; the surface potentials of the SiO2@EDAS nanoparticles have positive charge, so that the SiO2@EDAS nanoparticles can be attracted by the modified multi-wall carbon nanotube to form a composite structure; the surfaces of the Ag@Citrate nanomolecules are provided with negative charge; the volume of the Ag@Citrate nanomolecules is far smaller than that of the SiO2@EDAS nanoparticles; the electric property of the SiO2@EDAS nanoparticles is opposite to that of the Ag@Citrate nanomolecules; the Ag@Citrate nanomolecules are adhered to the surface of the modified multi-wall carbon nanotube to form a multilayer composite structure; silver ions have high sterilization effect, so that the modified multi-wall carbon nanotube adhered by the adhesion layer also has sterilization effect.

Description

technical field [0001] The invention relates to a composite structure of carbon nanotubes, in particular to a composite structure of carbon nanotubes with silicon dioxide nanoparticles and silver nanoparticles with high moisture retention and high bactericidal properties. Background technique [0002] Carbon Nanotube (CNT for short) is a tubular carbon molecule, each carbon atom on the carbon nanotube adopts sp 2 Mixed and combined with each other by carbon-carbon σ bonds to form a honeycomb structure composed of hexagons, which serves as the skeleton of the carbon nanotubes. A pair of p-electrons on each carbon atom of the carbon nanotube that does not participate in mixing forms a conjugated π-electron cloud that spans the entire carbon nanotube. Carbon nanotubes can be divided into single-wall carbon nanotubes and modified multi-wall carbon nanotubes according to the number of layers of the tubes. The radial direction of carbon nanotubes is quite thin, only nanoscale, w...

AI Technical Summary

Problems solved by technology

Unmodified carbon nanotubes are not effective in moisture and often do not have bactericidal properties. Moreover, commercially available silver bactericidal materials are mostly attached to other materials by coating, which cannot be effectively, stably and properly bonded to carbon nanotubes. The shedding phenomenon is also more obvious

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