Method for inducing polymer to graft carbon nano tube in mixed solvent for self-assembly

A technology of carbon nanotubes and mixed induction, which is applied in the direction of carbon compounds, nanotechnology, nanotechnology, etc., can solve the problem of not reflecting the characteristics of one-dimensional materials, and achieve the effect of regular shape and fast speed

Inactive Publication Date: 2014-12-10
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, much research has been done on how to improve the dispersion of carbon nanotubes and the compatibility with matrix materials, but uniformly dispersed carbon nanotubes are arranged randomly, and carbon nanotubes arranged in disorder are isotropic, reflecting properties of one-dimensional materials

Method used

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  • Method for inducing polymer to graft carbon nano tube in mixed solvent for self-assembly
  • Method for inducing polymer to graft carbon nano tube in mixed solvent for self-assembly
  • Method for inducing polymer to graft carbon nano tube in mixed solvent for self-assembly

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1: Disperse carbon nanotubes grafted with polystyrene into tetrahydrofuran by ultrasonic waves at a concentration of 0.05 mg / ml. While magnetically stirring, drop ethanol into the dispersion system and let it stand for 10 minutes. The self-assembled carbon nanotubes with a diameter of 0.5-1 μm were collected.

[0023] Step (1): Add 1mg of polystyrene-grafted carbon nanotubes into 20ml of tetrahydrofuran, the degree of polymerization of polystyrene is 200, the grafting rate of carbon nanotubes is 45%, and the length of carbon nanotubes is 15-20 μm. Ultrasonic dispersion for 15 minutes;

[0024] Step (2): While stirring magnetically at a speed of 100 r / min, 0.5 ml of ethanol was added dropwise. After the ethanol was added dropwise, stop the magnetic stirring and let it stand for 10 minutes. A self-assembly of carbon nanotubes with a length of 15-20 μm and a diameter of 0.5-1 μm can be collected at the bottom of the container.

Embodiment 2

[0025] Example 2: Disperse the carbon nanotubes grafted with polystyrene into dichlorobenzene by ultrasonic waves, the concentration is 0.2mg / ml, while stirring magnetically, drop benzene into the dispersion system, let it stand for 15 minutes, and it can be Self-assembled carbon nanotubes with a diameter of 2-4 μm were collected at the bottom of the container.

[0026] Step (1): Add 2mg polystyrene-grafted carbon nanotubes into 10ml dichlorobenzene, the degree of polymerization of polystyrene is 250, the grafting rate of carbon nanotubes is 45%, and the length of carbon nanotubes is 15~ 20μm, ultrasonic dispersion for 15 minutes;

[0027] Step (2): While stirring magnetically at a speed of 100 r / min, 5 ml of benzene was added dropwise. After the benzene is added dropwise, stop the magnetic stirring and let it stand for 15 minutes. A self-assembly of carbon nanotubes with a length of 15-20 μm and a diameter of 2-4 μm can be collected at the bottom of the container.

Embodiment 3

[0028] Example 3: Disperse polyacrylamide-grafted carbon nanotubes into deionized water by ultrasonic waves at a concentration of 0.3 mg / ml. While stirring magnetically, drop methanol into the dispersion system and let it stand for 20 minutes. The self-assembled carbon nanotubes with a diameter of 1.5-2.5 μm were collected.

[0029] Step (1): Disperse 6 mg of carbon nanotubes grafted with polyacrylamide into 20 ml of deionized water by ultrasonic waves. The degree of polymerization of polyacrylamide is 220, the grafting rate of carbon nanotubes is 40%, and the length of carbon nanotubes is 15~20μm, ultrasonic dispersion for 15 minutes;

[0030] Step (2): While stirring magnetically at a speed of 100 r / min, add 5 ml of methanol dropwise. After the methanol was added dropwise, stop the magnetic stirring and let it stand for 20 minutes. A self-assembly of carbon nanotubes with a length of 15-20 μm and a diameter of 1.5-2.5 μm can be collected at the bottom of the container.

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Abstract

The invention relates to a method for inducing polymer to graft a carbon nano tube in mixed solvent for self-assembly, and the method comprises the following steps of: firstly selecting the polymer to be grafted on the surface of the carbon nano tube, then dispersing the grafted carbon nano tube into the solvent matched with the polymer, stirring and adding a second solvent, and inducing the carbon nano tube to carry out self-assembly in the mixed solvent. The self-assembly body is a tube bundle with regular appearance, and consists of tens of to thousands of carbon nano tubes which are in height direction and are arranged parallelly. The method has simple steps, is easy to realize, and has less harm to the structure of the carbon nano tube. Self-assembly through solvent induction has the characteristic of being fast in speed and controllable in size of self-assembly body. According to self-assembly, the excellent property of the carbon nano tube in the axial direction is centralized and amplified, so that the carbon nano tube has wide application prospect.

Description

technical field [0001] The invention relates to a method for self-assembly of polymer-grafted carbon nanotubes in a solvent induced by solvent mixing. Background technique [0002] Iijima of Japan discovered carbon nanotubes in 1991. This one-dimensional nanomaterial is wound from single-layer or multi-layer graphite and has a hollow cylindrical structure. Carbon nanotubes have excellent mechanical, optical, electrical and thermal properties. They can not only be used as probes for detection instruments and sensors, nanowires and other microelectronic components, but also can be used to prepare reinforcing materials, conductive materials, thermal conductive materials, photoelectric materials and thermoelectric materials. [0003] At present, much research has been done on how to improve the dispersion of carbon nanotubes and the compatibility with matrix materials, but uniformly dispersed carbon nanotubes are arranged randomly, and carbon nanotubes arranged in disorder are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82Y30/00C01B32/168C01B32/174
Inventor 王国建刘洋
Owner TONGJI UNIV
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