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Method for amination of carbon nano tube

A carbon nanotube and amination technology, applied in the field of amination, can solve the problems of complex process and low efficiency of nitrogen-containing functional groups, and achieve the effect of simple process and high efficiency

Inactive Publication Date: 2010-07-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for the amination of carbon nanotubes in order to solve the problems of complex process and low efficiency of introducing nitrogen-containing functional groups in the existing carbon nanotube modification methods

Method used

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  • Method for amination of carbon nano tube

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The method for amination of carbon nanotubes in this embodiment is carried out according to the following steps: 1. Put 0.2-0.5 g of pretreated carbon nanotubes into a supercritical reactor, and then add 20-24 ml of Ammonia water or 20-24ml of ethylenediamine, the temperature of the supercritical reactor is controlled at 340-350°C, the pressure is 6-11MPa, the reaction time is 2-4min, and the reactor is cooled with water; After washing with distilled water, vacuum-drying at 55-65° C. to obtain aminated carbon nanotubes.

[0010] The process of the method of this embodiment is simple, and the carbon nanotubes after amination in this embodiment can be seen by infrared spectrum, and there is obvious -CH on the carbon nanotubes by infrared spectrum. 2 , -C=O, -C-N-H absorption peaks, it can be inferred that the amine group is grafted to the carbon nanotubes, and the aminated carbon nanotubes in this embodiment can be known by red X-ray photoelectron s...

specific Embodiment approach 2

[0011] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the pretreatment method in step 1 adopts purification treatment, and the specific operation is: burning the carbon nanotubes at 300-400 °C for 5-7 hours, that is The pretreated carbon nanotubes are obtained. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0012] Specific embodiment three: the difference between this embodiment and specific embodiments one to two is that the pretreatment of carbon nanotubes in step one adopts the method of acid treatment, and the specific operation is: a, carbon nanotubes are burned under the condition of 300-400 ° C 5~7h; b. Mix 250ml of mixed acid and 0.3~0.6g of carbon nanotubes treated in step 1, and sonicate for 5~7h at a frequency of 80~100Hz and a temperature of 45~55°C. h 2 SO 4 with concentrated HNO 3 According to the volume ratio of 3:1; c, after ultrasonic cleaning, wash with distilled water, and then use 0.45 μm microporous membrane to filter, and the precipitate obtained by suction filtration is vacuum-dried at 55-65 ° C to obtain the pretreated The carbon nanotubes are washed with distilled water for 3 to 5 times, and the standing time for each cleaning is 22 to 26 hours. Other steps and parameters are the same as those in Embodiments 1 to 2.

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Abstract

The invention discloses a method for amination of a carbon nano tube, relating to a method for amination and solving the problems of complicated process and low nitrogenous functional group introduction efficiency of the existing method for modification of the carbon nano tube. The method is as follows: first, putting the pre-treated carbon nano tube into a supercritical reactor for reaction; and second, washing the products from the first step through distilled water and then vacuum drying under 55-65 DEG C. In this way, an aminated carbon nano tube can be prepared. The method is simple in process, and the analysis of the infrared spectrum diagram and infrared X-ray electron spectrum diagram of the aminated carbon nano tube prepared through the method shows that the nitrogenous functional group introduction efficiency through the method is high.

Description

technical field [0001] The present invention relates to a method for amination. Background technique [0002] Carbon nanotube (CNT) is a new type of carbon structure discovered in 1991. It is a seamless, hollow tube formed by graphene sheets formed by carbon atoms. Generally, it can be divided into single-walled carbon nanotubes (SWCNT), double-walled carbon nanotubes (DWCNT) and multi-walled carbon nanotubes (MWCNT). At present, the international research on carbon nanotubes focuses on the modification or functionalization of carbon nanotubes. [0003] Carbon nanotubes have many peculiar physical properties, such as unique semiconductor characteristics, extremely high mechanical strength, large specific surface area, and excellent adsorption capacity. It has important application prospects in many fields, such as nanoelectronic devices, reinforced fibers, biological / chemical sensors, nanoprobes for hydrogen storage, energy storage materials, catalyst supports, etc. It is ...

Claims

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Application Information

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IPC IPC(8): C01B31/02
CPCY02P20/54
Inventor 邵路高章飞张力芹黄一峰丁新艳孟令辉白永平黄玉东王海生张建军
Owner HARBIN INST OF TECH
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