Preparation method of carbon nano pipe filled with organic solvent

A carbon nanotube and organic solvent technology, which is applied in the field of carbon nanotube preparation to achieve the effects of improving filling efficiency, less solvent consumption, and easy separation and purification

Inactive Publication Date: 2003-09-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there has been no experimental report on filling carbon nanotubes with organic solvents, mainly because, in the process of filling by capillary action, the filling efficiency is affected by the surface tension, viscosity, contact angle and diameter of the tube, etc. of the material to be filled. The influence of many factors

Method used

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  • Preparation method of carbon nano pipe filled with organic solvent
  • Preparation method of carbon nano pipe filled with organic solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 100 mg of multi-walled carbon nanotubes were added to 20 ml of mixed acid of sulfuric acid and nitric acid (volume ratio of 3), ultrasonicated for 2 hours, diluted with 100 ml of water and filtered, then washed with distilled water until medium properties and vacuum drying to obtain purified chopped carbon nanotubes with a diameter of 50-80 nanometers and a length of 0.5-5 micrometers.

[0020] Such as figure 1 As shown, after adding 20 mg of purified carbon nanotubes and 1.5 ml of toluene into the stainless steel high-pressure vessel 6, put it into the constant temperature water tank 8, adjust the temperature controller 9 to keep the temperature constant at 40 ° C, open the valve 3 and 5. Inject carbon dioxide through the syringe pump 2, when the pressure of the barometer 4 reaches 1.1×10 6 After Pascal, close the valve 3, keep the pressure and temperature for 15 hours, then lower the temperature to room temperature, open the valve 7 to decompress and vent t...

Embodiment 2

[0021] Example 2 According to the preparation method of Example 1, except that toluene is replaced by benzene, the filling rate of the obtained carbon nanotubes is also as high as 90%.

Embodiment 3

[0022] Example 3 According to the preparation method of Example 1, except that toluene is replaced by pentane, the filling rate of the obtained carbon nanotubes is as high as 90%.

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Abstract

A process for preparing the carbon nanotubes filled by organic solvent (benzene, toluene, pentane, methanol, etc) features use of supercritical fluid technique. Said carbon nanotubes have 1-200 nm ofdiameter and 0.01-50 microns of length. Its advantages are high fill efficiency and controllable operation.

Description

Technical field: [0001] The invention relates to a method for preparing carbon nanotubes filled with organic solvents. Background technique: [0002] Nanochemical reactions using carbon nanotubes as nanoreactors are of great significance for experimenting and understanding basic concepts such as the influence of dimension and size on chemical properties. The prerequisite for realizing the chemical reaction in carbon nanotubes is to find an effective and systematic method to fill organic solvents into carbon nanotubes. The early method for filling carbon nanotubes was mainly through capillary action, which can make some metals (Ajayan, P.M.; Iijima, S. Nature 1993, 361, 333.) and inorganic materials (Tsang, S.C.; Chen, Y.K.; Harris , P.J.F.; Green, M.L.H. Nature 1994, 372, 159.) enters carbon nanotubes in molecular form or in a liquid state. However, the filling efficiency of this method is low and difficult to control. [0003] According to the results of computer simulat...

Claims

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Application Information

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IPC IPC(8): C01B31/02
CPCY02P20/54
Inventor 刘云圻王贤保韩布兴刘志敏胡安平朱道本
Owner INST OF CHEM CHINESE ACAD OF SCI
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