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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  • 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

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  • Method for amination of carbon nano tube

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Example Embodiment

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

[0010] The method of this embodiment has a simple process. The aminated carbon nanotubes of this embodiment can be known by infrared spectroscopy, and there is obvious -CH on the carbon nanotubes infrared spectrogram. 2 , -C=O, -CNH absorption peaks, it can be inferred that the amine group is grafted onto the carbon nanotubes, and the aminated carbon nanotubes in this embodiment can be known from the ...

Example Embodiment

[0011] Specific embodiment two: This embodiment is different from specific embodiment one in that the pretreatment method in step one adopts purification treatment, and the specific operation is: burning carbon nanotubes at 300-400°C for 5-7h, namely The pretreated carbon nanotubes are obtained. Other steps and parameters are the same as in the first embodiment.

Example Embodiment

[0012] Specific embodiment three: this embodiment is different from specific embodiments one to two in that: in step one, the pretreatment of carbon nanotubes adopts an acid treatment method, and the specific operations are: a. The carbon nanotubes are burnt at 300-400°C 5~7h; b. Mix 250ml of mixed acid and 0.3~0.6g of the carbon nanotubes treated in step one under the conditions of frequency 80~100Hz and temperature 45~55℃ for 5~7h, where the mixed acid is concentrated H 2 SO 4 With concentrated HNO 3 The composition is in accordance with the volume ratio of 3:1; c. Wash with distilled water after ultrasound, and then filter with 0.45μm microporous membrane. The precipitate obtained by the suction filter is vacuum dried at 55~65℃ to obtain the pretreated For carbon nanotubes, the number of cleaning with distilled water is 3 to 5 times, and the standing time for each cleaning is 22 to 26 hours. The other steps and parameters are the same as those in the first to second embodime...

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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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