Unlock instant, AI-driven research and patent intelligence for your innovation.

Carbon nanotube dispersant and dispersion method based on carbazole-based conjugated polymer

A technology of conjugated polymers and double-walled carbon nanotubes, which is used in the field of carbon nanotube dispersants based on carbazole-based conjugated polymers, dispersion of double-walled carbon nanotubes, and monodisperse carbon nanotubes, which can solve the price Expensive, high water surface tension, easy to deactivate and other problems, to achieve the effect of good conductivity and excellent conductivity

Active Publication Date: 2021-10-12
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Typical biomolecular dispersants include DNA and organic matter, etc., such dispersant molecules are difficult to obtain and expensive, and they are easily inactivated in vitro, so they have high requirements for the dispersion system.
In addition, the above-mentioned three types of dispersants are all water-soluble substances, but the surface tension of water is relatively high and the volatility is poor, which makes it difficult to apply the aqueous dispersion of double-walled carbon nanotubes in various electronic devices.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Carbon nanotube dispersant and dispersion method based on carbazole-based conjugated polymer
  • Carbon nanotube dispersant and dispersion method based on carbazole-based conjugated polymer
  • Carbon nanotube dispersant and dispersion method based on carbazole-based conjugated polymer

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] More specifically, for example, a typical synthesis method of carbazole-based conjugated polymers includes: making 3,6-dibromocarbazole and 2,7-boronate carbazole undergo a Suzuki coupling reaction to obtain the Carbazole-based conjugated polymers.

[0062] Further, the synthesis method may include:

[0063] Take 3,6-dibromocarbazole, 2,7-boronate carbazole and the catalyst and mix them uniformly in an organic solvent, then add saturated potassium carbonate solution to form a mixed reaction system;

[0064] The mixed reaction system is frozen and solidified, and vacuumized to degas, then the mixed reaction system is returned to room temperature, and heated to reflux for reaction, and then the formed reaction mixture is post-treated to obtain the carbazole-based conjugated polymer.

[0065] Further, the organic solvent includes tetrahydrofuran, but is not limited thereto.

[0066] Further, the catalyst includes tetrakis(triphenylphosphine)palladium, but is not limited...

Embodiment 1

[0077] Embodiment 1: Please refer to the following formula showing a synthesis principle of a carbazole-based conjugated polymer (PCC) in a typical embodiment of the present invention.

[0078]

[0079] Concrete, the synthetic technique of aforementioned carbazole-based conjugated polymer (PCC) comprises the following steps:

[0080] a. Weigh 0.2g~1.3g 3,6-dibromocarbazole and 0.1g~0.5g 2,7-boronate carbazole as two polymerization reaction monomers and an appropriate amount of catalyst tetrakis(triphenylphosphine) palladium into two ports In the round bottom flask, add 15mL THF (tetrahydrofuran), stir magnetically until dissolved, then add 10mL saturated potassium carbonate solution, then freeze the reaction flask with liquid nitrogen, make the reaction system completely solidified, and then vacuumize and degas for 30min;

[0081] b. Remove the liquid nitrogen, and after the reaction system returns to room temperature, heat it to 70°C with a silicone oil bath and reflux for...

Embodiment 2

[0100] Example 2: Referring to Example 1, but using commercially available single-walled carbon nanotubes (about 0.8 nm to 1.2 nm in diameter) instead of the former double-walled carbon nanotubes to obtain a single-walled carbon nanotube dispersion (PCC-SWCNT). refer to Figure 6 is the near-infrared-visible-ultraviolet absorption spectrum of the single-walled carbon nanotube dispersion. It can be seen that PCC also has a good dispersion ability for single-walled carbon nanotubes. Then referring to Example 1, a thin film was made from the double-walled carbon nanotube dispersion, and the resistivity of the thin film was tested. It can be found that the thin film still maintains good electrical conductivity.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a carbon nanotube dispersant and a dispersing method based on a carbazole-based conjugated polymer. The carbazole-based conjugated polymer has a structure represented by the following formula: wherein R is a C3-C25 alkyl group, n is 7-70, and its number-average molecular weight is 5×10 3 g / mol~5×10 4 g / mol. The present invention uses a carbazole-based conjugated polymer as a carbon nanotube dispersant, which can efficiently and rapidly monodisperse carbon nanotubes (especially double-walled carbon nanotubes) in an organic phase, and the carbazole-based conjugated polymer The conductivity of carbon nanotubes is better than that of surfactants, and the degree of tight wrapping on the surface of carbon nanotubes is much lower than that of surfactants, which will not only less affect the conductivity of double-walled carbon nanotubes, but also make the surface of double-walled carbon nanotubes It can be more exposed to give full play to its excellent electrical conductivity. At the same time, the combination of the carbazole-based conjugated polymer and the carbon nanotube is mainly realized through the π-π interaction, and this non-covalent interaction will not damage to the carbon nanotube surface.

Description

technical field [0001] The invention relates to a method for dispersing double-walled carbon nanotubes, in particular to a carbazole-based conjugated polymer-based carbon nanotube dispersant and a carbon nanotube monodisperse method, and belongs to the technical field of nanomaterials. Background technique [0002] Double-walled carbon nanotubes (DWCNTs) have excellent electrical conductivity and have potential applications in the fields of transparent conductive films and field effect transistors. However, the double-walled carbon nanotube powders obtained by the current growth method are aggregates. In order to give full play to the electrical conductivity of double-walled carbon nanotubes, it is necessary to obtain a stable monodisperse liquid capable of uniform film formation over a large area. Therefore, it is very important to find an efficient dispersant. [0003] In the prior art, double-walled carbon nanotube dispersants mainly include three types of surfactants, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/174
CPCC01P2004/04
Inventor 何缘邱松金赫华李清文
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI