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Temperature-responsive supramolecular branched carbon nanotubes and preparation method thereof

A carbon nanotube, temperature-responsive technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve improved dispersibility, excellent dispersibility and stability, good dispersibility and stability. Effect

Inactive Publication Date: 2015-02-25
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the research on carbon nanotubes has made some progress, but there are few reports on carbon nanotubes with temperature responsiveness, and the use of biocompatible systems to modify carbon nanotubes through non-public means can also The reversible aggregation and dispersion of carbon nanotubes controlled by temperature has not been reported

Method used

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  • Temperature-responsive supramolecular branched carbon nanotubes and preparation method thereof
  • Temperature-responsive supramolecular branched carbon nanotubes and preparation method thereof
  • Temperature-responsive supramolecular branched carbon nanotubes and preparation method thereof

Examples

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Effect test

Embodiment 1

[0023] Example 1: Four amounts of carbon nanotubes, respectively 0.1, 0.3, 0.5, and 1.0 mg, were added to 5 mL of the same substance with a concentration of 1.05×10 -4 M / L (converted to mass concentrations of first-generation and second-generation peryleneimide concentrations of 0.2 g / L and 0.57 g / L) and G1-PBI and G2-PBI aqueous solutions with the same mass concentration of 0.2 g / L. Sonicate in ice water for 45 minutes at 99W power. The resulting mixture was then centrifuged at 10,000 rpm for 30 minutes, and the supernatant was removed. The prepared product has excellent dispersibility and stability in water, and no precipitation occurs after being placed for half a year. The dispersion effect of carbon nanotubes with a mass concentration of 0.57 g / L second-generation peryleneimide is shown in figure 1 .

Embodiment 2

[0024] Example 2: The supramolecular interaction between the first-generation peryleneimide and carbon nanotubes was studied by fluorescence emission spectroscopy. Such as figure 2 It is shown that the first-generation peryleneimide has a strong emission peak at 700 nm when no carbon nanotubes are added. But with the increasing amount of carbon nanotubes added, the emission peak intensity gradually decreased. The reason is that with the gradual increase in the amount of carbon nanotubes added, more first-generation peryleneimides are adsorbed on the surface of carbon nanotubes, resulting in the quenching of fluorescence and a gradual decrease in the intensity of the emission peak. There is a similar effect between imines and carbon nanotubes. This characterization means shows that the present invention has prepared dendritic carbon nanotubes by supramolecular means.

Embodiment 3

[0025] Example 3: The dispersibility of peryleneimides of different generations on carbon nanotubes was studied by near-infrared absorption spectroscopy. Such as image 3 As shown, there are characteristic absorption peaks of uniformly dispersed carbon nanotubes at 600-800nm ​​and 800-1100nm. And the peak intensity has a linear relationship with the dispersed concentration of carbon nanotubes. It can be seen from the figure that under the same amount of carbon nanotubes added, when the mass concentration of the first-generation peryleneimide and the second-generation peryleneimide are both 0.2 g / L, the dispersion concentration of the second-generation peryleneimide on the carbon nanotubes is slightly Higher than the first-generation peryleneimide; when the first-generation and second-generation peryleneimides have the same concentration, that is, when the mass concentration is 0.2 g / L and 0.57 g / L, the second-generation peryleneimide has a greater effect on carbon nanotubes. ...

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Abstract

The invention relates to temperature-responsive supramolecular branched carbon nanotubes and a preparation method thereof. Under the p-p conjugation action of the perylene in branched perylene imide derivatives and the carbon nanotube surface, the branched alcoxyl ether is adsorbed to the carbon nanotube surface, thereby enhancing the dispersity of the carbon nanotubes in water; and the accumulation and dispersion of the branched carbon nanotubes in water can be adjusted by temperature. The supramolecular branched carbon nanotubes have favorable dispersity and stability in water, and the branched perylene imide derivatives with higher hypercomplex system can further enhance the dispersity of the carbon nanotubes in water. The accumulation and dispersion of the branched carbon nanotubes in water can be adjusted by temperature. The method effectively overcomes the defect of high accumulation tendency of carbon nanotubes in water, effectively enhances the uniform dispersion of the carbon nanotubes in water, endows the carbon nanotubes with temperature responsiveness, and widens the application range of the carbon nanotubes in the fields of biomedicine, materials, energy and the like.

Description

technical field [0001] This article relates to a dendritic carbon nanotube and a preparation method thereof, in particular to a temperature-responsive supramolecular dendritic carbon nanotube and a preparation method thereof. Background technique [0002] Carbon nanotubes (CNTs) are seamless nanoscale round tubes formed by rolling single-layer or multi-layer graphite sheets around the central axis at a certain rotation angle. According to the number of layers of graphite sheets, carbon nanotubes can be divided into single-walled carbon nanotubes and multi-walled carbon nanotubes. Because the unique structure of carbon nanotubes endows it with unique mechanical, electrical, optical, and chemical properties, it has a wide range of research applications in the fields of modern physics, chemistry, information, environment, materials, energy, biology, and medicine. For example, recognition motifs can be grafted on carbon nanotubes, which can be made into recognition materials or...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y30/00
Inventor 张阿方夏文杰陈若彬张晓茜龙平苏新艳李文刘坤
Owner SHANGHAI UNIV
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