Method for synthesizing modified SWCNTs (Single Wall Carbon Nano Tubes) based on Bergman cyclizing reaction

A single-wall carbon nanotube, cyclization reaction technology, applied in the direction of carbon nanotubes, chemical instruments and methods, nanotechnology for materials and surface science, etc., to achieve the effect of good dispersion

Inactive Publication Date: 2015-03-25
EAST CHINA UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

However, so far, the modification of single-walled carbon nanotubes by Bergman cyclization has not been reported.

Method used

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  • Method for synthesizing modified SWCNTs (Single Wall Carbon Nano Tubes) based on Bergman cyclizing reaction
  • Method for synthesizing modified SWCNTs (Single Wall Carbon Nano Tubes) based on Bergman cyclizing reaction
  • Method for synthesizing modified SWCNTs (Single Wall Carbon Nano Tubes) based on Bergman cyclizing reaction

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Embodiment Construction

[0028] The present invention is based on the method of Bergman cyclization reaction modified single-walled carbon nanotubes as follows:

[0029] Instrument and reagent used in the present invention:

[0030] Nuclear magnetic resonance (Ultra Shield 400 spectrometer, USA); liquid chromatography / time-of-flight mass spectrometry (Micromass LCTTM, UK); thermogravimetric analyzer (SDT Q600, USA); ultraviolet-visible spectrophotometer (UV -2550PC, Japan); Fourier transform infrared spectrometer (Nicolet 5700, USA); transmission electron microscope (JEM-2010 / INCA, UK); electrospinning equipment (self-made, spinning voltage: 30kV).

[0031] Single-walled carbon nanotubes SWCNTs (purity ≥ 95%, Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences). Purify according to the literature before use. Polycaprolactone (PCL) molecular weight is 105g / mol, Shenzhen Guanghua Chemical Co., Ltd., organic solvents such as N-methylpyrrolidone, tetrahydrofuran and methylene chloride are a...

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Abstract

The invention relates to a method for synthesizing modified SWCNTs (Single Wall Carbon Nano Tubes) based on Bergman cyclizing reaction. The method is characterized by comprising the following steps: weighting 10mg purified SWCNTs, of which the purity is more than or equal to 95%; placing the SWCNTs into a dry Schlenk bottle; adding anhydrous N-methyl pyrrolidone; ultrasonically dispersing; adding a 1.0g compound G1 or G2 equivalent to 4eq SWCNTs; keeping on ultrasonically dispersing; under the protection of nitrogen, heating the reacting mixture at 170-190 DEG C and flowing back; stirring and reacting for 3-4 days; cooling the products to room temperature; filtering the obtained greenblack products with a 0.22 micron polytetrafluoroethylene filtering film; washing the products with a large amount of ethyl ether and tetrahydrofuran in turn till the filtrate is colorless; and lastly, vacuum-drying, thereby obtaining about 14mg products of SWCNTs-G1 or SWCNTs-G2. After the modified CNTs (Carbon Nano Tubes) and PCL (Polycaprolactam) are mixed and dispersed in a tetrahydrofuran solution, the electrostatic spinning operation is performed. Observed from a transmission electron microscope, the CNTs are axially arrayed in PCL silk fibers and are excellently dispersed. A way for applying the modified CNTs in a compound material is supplied.

Description

technical field [0001] The invention relates to a method for synthesizing functionalized single-wall carbon nanotubes by cyclization reaction, in particular to a method for modifying single-wall carbon nanotubes based on Bergman cyclization reaction. Background technique [0002] Since the discovery of carbon nanotubes (CNTs) in 1991, they have attracted extensive attention in many research fields due to their unique chemical, electronic and mechanical properties. Including research and application in high-performance composite materials, chemical sensors, nanoelectronic components, photovoltaic devices, and biomedicine. However, due to the strong van der Waals force and π-π bonds between carbon nanotubes, tight agglomeration occurs, which makes carbon nanotubes insoluble and difficult to disperse in solvents, which ultimately limits its use. Therefore, many researchers are devoting themselves to modifying carbon nanotubes, and modifying the side walls of carbon nanotubes b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/78C01B31/02B82Y40/00B82Y30/00C01B32/159C01B32/168
Inventor 马建国刘淑娟邓胜胡爱国
Owner EAST CHINA UNIV OF TECH
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