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

A carbon nanotube, water-soluble technology, used in the field of medicine, can solve problems such as insolubility in water, and achieve the effects of strong water dispersibility, good physical and chemical stability, and good quality.

Inactive Publication Date: 2012-10-03
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above situation, in order to solve the defects of the prior art, the object of the present invention is to provide a water-soluble carbon nanotube and its preparation and application method, which can effectively solve the problem that the existing carbon nanotube has a highly hydrophobic surface and is insoluble in water and organic solvents. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0012] Described preparation method is:

[0013] (1) Treat carbon nanotubes with acid to obtain carbon nanotubes with carboxyl groups on the surface;

[0014] (2) react carbon nanotubes with carboxyl groups on the surface with an ammoniating reagent to obtain carbon nanotubes with amino groups on the surface;

[0015] (3) React carbon nanotubes with amino groups on the surface with aziridine. In the presence of hydrogen ions, aziridine is continuously grafted on amino groups, and finally forms polyethyleneimide carbon nanotubes, that is, water-soluble carbon nanotubes.

Embodiment 1

[0018] (1) Add 100mL of dilute nitric acid with a concentration of 4mol / L to 100mg of carbon nanotubes, heat at 110°C after dispersion, and stir and reflux at 400r / min for 2 hours to make it react fully. After the reaction is completed, wash with ultrapure water continuously and use 0.1 After filtering with a microporous membrane of μm, add 100mL of dilute hydrochloric acid with a concentration of 1mol / L, and ultrasonically react for 30min. Obtain carbon nanotubes with carboxyl groups on the surface;

[0019] (2) Add 50mg of carbon nanotubes with carboxyl groups on the surface and 2mg of dicyclohexylcarbodiimide into 20ml of ethylenediamine, heat at 120°C, stir and reflux at 400r / min for 48h, fully react, and wash continuously with absolute ethanol , filtered to obtain a filter cake, and vacuum-dried the filter cake at 40° C. to obtain carbon nanotubes with amino groups on the surface;

[0020] (3) Mix 40mg of carbon nanotubes with amino groups on the surface, 0.5ml of azirid...

Embodiment 2

[0022] (1) Add 100mL of dilute nitric acid with a concentration of 4mol / L to 100mg of carbon nanotubes, heat at 110°C after dispersion, and stir and reflux at 400r / min for 2 hours to make it react fully. After the reaction is completed, wash with ultrapure water continuously and use 0.1 After filtering with a microporous membrane of μm, add 100mL of dilute hydrochloric acid with a concentration of 1mol / L, and ultrasonically react for 30min. Obtain carbon nanotubes with carboxyl groups on the surface;

[0023] (2) Add 50 mg of carbon nanotubes with carboxyl groups on the surface to 20 ml of a mixed solution of thionyl chloride and N`-N`dimethylformamide, the thionyl chloride and N`-N`di The volume ratio of methylformamide is 19:1, heated under reflux and stirred, fully reacted, washed with anhydrous tetrahydrofuran, filtered with suction, added excess ethylenediamine and stirred thoroughly, washed with absolute ethanol 20 times while suction filtered to obtain filter cake, vac...

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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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y40/00C01B32/168
Inventor 张振中王蕾史进进高岩李璐璐张红岭
Owner ZHENGZHOU UNIV
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