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Method for preparing surface phosphorylated water-soluble carbon nanotube and prepared carbon nanotube

A technology of carbon nanotubes and water solubility, which is applied in the field of carbon nanotubes, can solve the problems of poor water solubility of carbon nanotubes, and achieve the effect of simple and easy preparation method, good biocompatibility and low price

Inactive Publication Date: 2011-08-10
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing water-soluble carbon nanotubes with surface-modified phosphonic acid groups and water-soluble carbon nanotubes, so as to overcome the defects of poor water solubility of carbon nanotubes and satisfy the research and development of carbon nanotubes in related fields. application requirements

Method used

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  • Method for preparing surface phosphorylated water-soluble carbon nanotube and prepared carbon nanotube
  • Method for preparing surface phosphorylated water-soluble carbon nanotube and prepared carbon nanotube
  • Method for preparing surface phosphorylated water-soluble carbon nanotube and prepared carbon nanotube

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The carbon nanotubes are purified and calcined as follows:

[0033] (1) Add 100-500 mg MWNTs carbon nanotubes and 10-35 ml concentrated hydrochloric acid (36-38%) into a 50 ml three-necked flask equipped with a reflux condensing device, reflux at 50 °C while magnetic stirring, and react After 5 h, cool to room temperature, add 100 ml of distilled water to dilute, let it stand until the carbon nanotubes are completely precipitated, pour off the supernatant, filter the lower suspension with a microporous membrane, wash with water until the pH of the dripping filtrate=7, A black filter cake of black carbon nanotubes was obtained. Product A was obtained by drying at room temperature.

[0034] (2) Add the product A dried in step 1 and 10-35 ml concentrated nitric acid (65-68%) into a 50 ml three-necked flask equipped with a reflux condensing device, reflux at 50 °C while magnetically stirring, and react 3 After h, cool to room temperature, add 100 ml of distilled water to ...

Embodiment 2

[0038]Take 6.66 mg of treated SWNTs (the treatment method is the same as in Example 1) and dissolve them in 30 ml of distilled water. After ultrasonication for half an hour, add 30 ml of 10 mM benzylidene phosphonic acid with pH=7. The mixture is ultrasonicated for 10 h. After sufficient reaction Filtrate with a microporous membrane, wash with water until clean, and dry at room temperature to obtain phosphonated water-soluble SWNTs.

Embodiment 3

[0040] Take 666 mg of treated MWNTs (the treatment method is the same as in Example 1) and dissolve them in 300 ml of distilled water. After ultrasonication for half an hour, add 30 ml of 10 mM naphthalene-1-methylenephosphonic acid with pH=7, and the mixture is ultrasonicated for 10 h. After fully reacting, filter with a microporous membrane, wash with water until clean, and dry at room temperature to obtain phosphonated water-soluble MWNTs.

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Abstract

The invention discloses a method for preparing a surface phosphorylated water-soluble carbon nanotube and the prepared carbon nanotube. The method comprises the following steps of: purifying a carbon nanotube, performing calcination treatment on the purified carbon nanotube, and putting into aqueous solution of a phosphonic acid derivative of an aromatic compound; performing ultrasonic dispersion for 3 to 10 hours; filtering and repeatedly washing; and drying at the temperature of between 25 and 40 DEG C to obtain the surface phosphorylated water-soluble carbon nanotube. In the invention, a -PO3H2 functional group is modified on the surface of the carbon nanotube through nonconvalent binding under the action of pi-pi accumulation conjugation, so that the unique property of the carbon nanotube is maintained and the dispersion stability of the carbon nanotube in water is improved on the basis of high water solubility of the phosphonic acid functional group. The preparation method has definite and reliable mechanisms, is simple and practicable and is low in price; and the prepared carbon nanotube has high dissolution dispersibility in the water and has a wide application prospect in the field of material science and biomedicine.

Description

technical field [0001] The invention relates to a method for preparing water-soluble carbon nanotubes and the prepared carbon nanotubes, in particular to a method for preparing water-soluble carbon nanotubes with surface-modified phosphonic acid groups and the prepared carbon nanotubes. Background technique [0002] Carbon Nanotubes (CNTs for short) are hollow tubes formed by graphene sheets formed by carbon atoms, and are divided into single-wall nanotubes (Single-wall Nanotubes, SWNT) and multi-wall carbon nanotubes (Multi-wall Nanotubes, MWNT). Since the discovery of carbon nanotubes by Japanese scientist Lijima in 1991, due to the advantages of small diameter and large aspect ratio, carbon nanotubes have excellent mechanical, thermal, electrical, optical and other properties, and have been subject to material science, chemistry and physics. Favored by researchers in other fields, it is a nanomaterial with unique structure and wide application prospects. [0003] CNTs w...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B31/00
Inventor 陈煜郑敏周益明唐亚文陆天虹
Owner NANJING NORMAL UNIVERSITY
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