Water-soluble carbon nano-tube and preparation method and application method thereof

Abstract

The invention relates to a water-soluble carbon nano-tube and a preparation method and application method of the water-soluble carbon nano-tube, and solves the problem that the carbon nano-tube has a highly hydrophobic surface so as not to dissolve into water and organic solvents. The technical scheme is as follows: the carbon nano-tube is connected with a water-soluble polymer-polyethyleneimine by chemical bonds, and the weight ratio of the carbon nano-tube to the polyethyleneimine is 1:(0.085-0.125). The preparation method of the water-soluble carbon nano-tube comprises the following steps of: treating the carbon nano-tube by acid to obtain the carbon nano-tube with carboxyl groups on the surface; reacting the treated carbon nano-tube with ammoniation agent to obtain the carbon nano-tube with amino groups on the surface; reacting the carbon nano-tube with amino groups with ethyleneimine and making ethyleneimine continuously graft on amino groups in the presence of hydrogen ions; and finally, forming polyethyleneimine carbon nano-tube, i.e., the water-soluble carbon nano-tube. The water-soluble carbon nano-tube prepared by the method provided by the invention does not damage the structure of the carbon nano-tube, and has the characteristics of strong water dispersing property, low toxicity, good physical and chemical stability, low need in the preparation conditions, abundant raw materials and low cost.

Description

technical field

[0001] The invention relates to the field of medicine, in particular to a water-soluble carbon nanotube and its preparation and application method. Background technique

[0002] Carbon nanotubes were accidentally discovered by Iijima of Japan's NEC Basic Research Laboratory under a high-power transmission electron microscope in 1991. After research, they are multi-walled carbon nanotubes. In 1993, Iijima and IBM research groups reported the observation of single-walled carbon nanotubes almost simultaneously. Since then, carbon nanotubes have become a bright star in the family of carbon nanomaterials. The discovery and application of single-walled carbon nanotubes was also rated as one of the top ten human scientific discoveries in 1997 by the world's authoritative magazine Nature. As a new type of non-viral gene drug carrier, carbon nanotubes have attracted widespread attention because of their inherent unique physical, chemical and biological properties. ...