Carbon nanotube dispersing agent for dispersing carbon nanotubes and preparation method and application of carbon nanotube dispersing agent

A carbon nanotube and dispersant technology, applied in the field of carbon nanotube dispersant and its preparation, can solve the problems of destroying the structure of carbon nanotubes, reducing electrical and thermal properties, and easily re-entanglement and agglomeration of carbon tubes. Excellent compatibility, the effect of important commercial application value

Active Publication Date: 2019-06-11
JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the mechanical dispersion method cannot solve the fundamental problem of agglomeration due to the van der Waals force between carbon tubes, resulting in the re-entanglement and agglomeration of the dispersed carbon tubes. Although the covalent bond functionalization can disperse the carbon nanotubes in the solvent, this method destroys the carbon nanotubes. The structure of the nanotube surface leads to a significant reduction in its electrical and thermal properties

Method used

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  • Carbon nanotube dispersing agent for dispersing carbon nanotubes and preparation method and application of carbon nanotube dispersing agent
  • Carbon nanotube dispersing agent for dispersing carbon nanotubes and preparation method and application of carbon nanotube dispersing agent
  • Carbon nanotube dispersing agent for dispersing carbon nanotubes and preparation method and application of carbon nanotube dispersing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Put 13 parts of 4,4'-oxydiphthalic anhydride and 120 parts of NMP into a 500ml flask equipped with a mechanical stirring and condensing reflux device, and raise the temperature to 90°C to obtain a mixed solution of NMP;

[0052] Add 15.6 parts of lauryl alcohol, 0.2 parts of p-toluenesulfonic acid and 23 parts of NMP mixed solution dropwise into the reaction bottle, and react for 1 hour after the dropwise addition, until the characteristic peak of acid anhydride on the infrared spectrum FTIR disappears,

[0053] Introduce nitrogen, add 84 parts of polyetheramine L-100 and 1.2g of p-toluenesulfonic acid into the flask, react at 180°C for 7 hours, titrate the amine value of the solution, the reaction conversion rate is >90%, and remove the solvent by distillation under reduced pressure , to obtain the carbon nanotube high-efficiency dispersant 1.

Embodiment 2

[0055] Put 10 parts of 4,4'-oxydiphthalic anhydride and 100 parts of NMP into a 500ml flask equipped with a mechanical stirring and condensing reflux device, and raise the temperature to 90°C to obtain a mixed solution of NMP;

[0056] Add 12 parts of lauryl alcohol, 0.2 parts of p-toluenesulfonic acid and 10 parts of NMP mixed solution dropwise into the reaction flask, and react for 1 hour after the dropwise addition, until the characteristic peak of anhydride on the infrared spectrum FTIR disappears;

[0057] Introduce nitrogen, add 129 parts of polyetheramine L-207 and 1.2 g of p-toluenesulfonic acid into the flask, react at 180°C for 7 hours, titrate the amine value of the solution, the reaction conversion rate is >90%, and remove the solvent by distillation under reduced pressure. The carbon nanotube high-efficiency dispersant 2 was obtained.

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Abstract

The invention relates to the field of carbon nanotubes, in particular to a carbon nanotube dispersing agent for dispersing carbon nanotubes and a preparation method and application of the carbon nanotube dispersing agent. The dispersing agent is an aromatic group-containing surfactant, the carbon nanotube high-efficiency dispersing agent has a hydrophobic and hydrophilic structure (a Gemini-type structure), and single-walled, double-walled and multi-walled carbon nanotubes can be dispersed efficiently so as to produce uniform and stable aqueous slurry. The process comprises the following steps: selecting an aromatic dianhydride compound and long-chain fatty alcohol for a ring-opening reaction, and performing a reaction on the product of the ring-opening reaction and polyether amine so as to obtain the finished product carbon nanotube high-efficiency dispersing agent. Only two steps of reactions are needed for preparation of the carbon nanotube high-efficiency dispersing agent, and theprocess is simple and easy; and the carbon nanotube aqueous slurry prepared by using the dispersing agent has the advantages of high concentration, a short dispersion period, good slurry stability andthe like, has excellent compatibility with aqueous resin, can be widely applied to multiple carbon-nanotube aqueous functional coatings and ink, and has an important commercial application value.

Description

technical field [0001] The invention relates to the field of carbon nanotubes, in particular to a carbon nanotube dispersant for dispersing carbon nanotubes, a preparation method and application thereof. technical background [0002] Carbon nanotube (carbon nanotube, CNT) is sp 2 One-dimensional tubular nanomaterials composed of hybrid C-C bonds, in which the super strong C-C covalent bonds endow carbon nanotubes with super strong mechanical properties and structural stability, and have superior mechanical, electrical, thermal and functional properties. Carbon nanotubes have a large aspect ratio and specific surface area, and are prone to entanglement and agglomeration between carbon tubes, making it difficult to effectively disperse in the matrix. These problems seriously hinder the application of carbon nanotubes in mechanics, electricity, and heat. Therefore, , the dispersion of carbon nanotubes is the key to solve its industrial application. [0003] At present, the di...

Claims

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Application Information

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IPC IPC(8): C08G65/331C09D17/00C09D11/03
Inventor 陈名海戴辉
Owner JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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