Dispersion method of single-walled carbon nanotube

A single-walled carbon nanotube, dispersion technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of limited dispersion, limited application, poor solubility, etc., and achieve mild conditions. Effect

Inactive Publication Date: 2014-11-12
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the fact that carbon nanotubes are easily aggregated due to the attraction of van der Waals forces and the influence of hydrophobic interactions, the solubility of carbon nanotubes in various common solvents, especially water, is poor, which severely limits their Dispersion in common solvents, which greatly limits their applications

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0060] (1) Synthesis of Py-PDEAEMA

[0061] Flowchart such as figure 2 shown.

[0062] a. Put 116mg of 1-pyrene methanol into a 25mL reaction flask, add 5mL of dry THF, 152mg of triethylamine (Et 3 N), stirring to dissolve, ice bathing, dissolving 345mg of bromoisobutyryl bromide in 5mL of dry THF, putting it in the dropping funnel and adding it to the reaction system dropwise, after 20min the addition was completed, a white solid was formed, at 25°C The reaction was stirred for 1 day. After the reaction is finished, filter, transfer the filtrate to a separatory funnel, add 60mL of dichloromethane, extract with saturated ammonium chloride solution, saturated sodium bicarbonate solution and saturated sodium chloride solution respectively, separate the liquids, and wash the organic phase with anhydrous Dried over magnesium sulfate, filtered, concentrated, and column chromatographed (petroleum ether:dichloromethane=3:1, volume ratio) to obtain 0.37 g of the target product Py-A...

Embodiment 2

[0076] (1) Synthesis of Py-PDEAEMA

[0077] a and b steps are the same as in Example 1.

[0078] (2) Disperse single-walled carbon nanotubes in ethyl acetate

[0079] Put 10mg of Py-PDEAEMA into a 25mL single-necked flask, add 10mL of ethyl acetate, fully dissolve, add 1mg of SWNTs, ultrasonic 30min, SWNTs are evenly dispersed in ethyl acetate, the polymer concentration is 1mg / mL, and the concentration of SWNTs is 0.1 mg / mL SWNTs homogeneously dispersed ethyl acetate solution.

[0080] (3) Disperse single-walled carbon nanotubes in water

[0081] The ethyl acetate solution of the polymer / SWNTs composite was spin-dried and vacuum-dried to obtain a solid polymer / SWNTs composite.

[0082] The Raman spectrum of the polymer / SWNTs composite prepared in this example and the Raman spectrum of the polymer / SWNTs composite in Example 1 ( Figure 8 ) has no substantial difference, it can be known that there is a strong π-π interaction between the pyrene group in Py-PDEAEMA and SWNTs c...

Embodiment 3

[0086] (1) Synthesis of Py-PDEAEMA

[0087] a. Put 348mg of pyrenemethanol into a 50mL reaction flask, add 15mL of dry THF, 456mg of triethylamine (Et3N), stir to dissolve, put in an ice bath, dissolve 1035mg of bromoisobutyryl bromide in 15mL of dry THF, place in the drop The reaction system was added dropwise into the liquid funnel, and after 15 minutes of completion of the dropwise addition, a white solid was formed, and the reaction was stirred at room temperature for 0.5 days. After the reaction, filter, transfer the filtrate to a separatory funnel, add 150mL of dichloromethane, extract with saturated ammonium chloride solution, saturated sodium bicarbonate solution and saturated sodium chloride solution respectively, separate the liquid, and wash the organic phase with anhydrous Dried over magnesium sulfate, filtered, concentrated, and column chromatographed (petroleum ether:dichloromethane=3:1), the target product Py-ATRP was obtained 1.12g, yield: 98%.

[0088] b. Put...

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Abstract

The invention discloses a dispersion method of a single-walled carbon nanotube. The invention provides a polymer shown in the formula I, and a preparation method of the polymer. In the formula I, i is a natural number between 20 and 150. The dispersion of the single-walled carbon nanotube in an organic solvent can be realized by mixing the polymer shown in the formula I and the single-walled carbon nanotube in an organic solvent. On the basis, a complex of the polymer shown in the formula I and the single-walled carbon nanotube can be obtained after the organic solvent is removed, and the dispersion of the single-walled nanotub in water can be realized by adding the complex into water and introducing CO2 gas. A polymer chain can be ensured to take effect with only one carbon tube by using a pyrene group-containing ATRP initiator (a compound shown in the formula II); the single-walled carbon nanotube can be dispersed by utilizing the polymer shown in the formula I and CO2, so that the carbon tube can be dispersed into the organic solvent and water; and the method is simple, convenient and easy, and mild in conditions; the SWNT dispersed by utilizing the method cannot be agglomerated, can be evenly dispersed, and can be used for further functionalization or industrial processing.

Description

technical field [0001] The invention relates to a method for dispersing single-walled carbon nanotubes, in particular to a 2 The invention discloses a method for gas dispersing single-walled carbon nanotubes, which belongs to the technical field of carbon nanotube dispersion. Background technique [0002] Carbon has many allotropes. In addition to the well-known diamond and graphite, fullerenes, carbon nanotubes and graphene have become the focus of nanotechnology due to their unique properties in structure, mechanics, and electronics. "darling". Among them, carbon nanotubes have shown great promise in nanoelectronics and optoelectronics, vacuum electronics, high-strength composite materials, nanomedicine and drug delivery, sensors and actuators, nanoscale templates and channels, optical components, and thermally conductive materials. Broad application prospects. [0003] However, since carbon nanotubes are easily aggregated by van der Waals' attraction and hydrophobic in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/34C01B31/02B82Y30/00
Inventor 袁金颖刘博文冯岸超辛龑
Owner TSINGHUA UNIV
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