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Carbon nanotube polymer composite conductive material and preparation method thereof

A technology of carbon nanotubes and composite conduction, which is applied in the field of nanomaterials, can solve the problems of complex operation, large amount of carbon nanotubes, and unsatisfactory conductivity, etc., and achieve simple equipment, large-scale production, and improved random distribution. Effect

Active Publication Date: 2019-05-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a carbon nanotube polymer composite conductive material for the above-mentioned deficiencies in the prior art, which is used to solve the problem of adding carbon nanotubes in the preparation of the existing carbon nanotube / polymer composite conductive material. Large amount, poor conductivity, complicated operation, etc.

Method used

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  • Carbon nanotube polymer composite conductive material and preparation method thereof

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Effect test

Embodiment 1

[0030] A kind of preparation method of carbon nanotube polymer composite conductive material, prepares (electrolyte solution is sodium chloride solution) with colloid agglomeration method, and the steps that it comprises are as follows:

[0031] (1) Preparation of carbon nanotube dispersion: 1.0g carbon nanotubes are mixed with 0.03g sodium dodecylbenzene sulfonate and added to 40ml deionized water, and the ultrasonic treatment with a power of 1100W and a frequency of 19.5 for 35min or Or homogenize 6 times at 1200bar, centrifuge at 900rpm for 25min to remove undispersed carbon nanotube aggregates, and take the supernatant for later use;

[0032] (2) Uniform mixing of carbon nanotubes and water-based polyurethane emulsion: take 0.06g of the carbon nanotube dispersion prepared in (1) and 15g of water-based polyurethane emulsion, and use a power of 200W and a frequency of 40KHz for ultrasonic treatment for 30min to achieve nanoscale uniformity. mix;

[0033] (3) Add electrolyte...

Embodiment 2

[0037] A kind of preparation method of carbon nanotube polymer composite conductive material, prepares (electrolyte solution is potassium chloride solution) with colloid agglomeration method, and the steps that it comprises are as follows:

[0038] (1) Preparation of carbon nanotube dispersion: 2.0g of carbon nanotubes and 0.03g of sodium dodecylbenzenesulfonate were mixed and added to 80ml of deionized water, and subjected to ultrasonic treatment with a power of 1500W and a frequency of 20.5KHz for 50min Or homogenize at 1200bar for 8 times, centrifuge at 1400rpm for 35min to remove undispersed carbon nanotube aggregates, and take the supernatant for later use.

[0039](2) Uniform mixing of carbon nanotubes and water-based polyurethane emulsion: take 0.08g (1) of the prepared carbon nanotube dispersion and 16g of water-based polyurethane emulsion through a power of 250W, a frequency of 40KHz ultrasonic treatment for 40min, to reach the nano-scale Mix well.

[0040] (3) Add e...

Embodiment 3

[0044] A preparation method of carbon nanotube polymer composite conductive material, prepared by colloidal agglomeration (electrolyte solution is calcium chloride solution), the steps it includes are as follows:

[0045] (1) Preparation of carbon nanotube dispersion: After mixing 1.5g carbon nanotubes with 0.04g sodium octadecyl sulfate, add them to 60ml deionized water, and after the power is 1500W, the frequency is 20KHz ultrasonic treatment for 40min or 1300bar. 8 times, centrifuged at 1000 rpm for 30 min to remove undispersed carbon nanotube aggregates, and the supernatant was taken for later use.

[0046] (2) Uniform mixing of carbon nanotubes and water-based polyurethane emulsion: get 0.06g (1) prepared carbon nanotube dispersion and 15g water-based polyurethane emulsion polyacrylic acid emulsion at a power of 200W and a frequency of 40KHz for 30min of sonication, reaching Homogeneous mixing at the nanometer level.

[0047] (3) Add electrolyte: add 0.03mol / L calcium ch...

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Abstract

The invention relates to a carbon nanotube polymer composite conductive material. The carbon nanotube polymer composite conductive material is prepared from the following components in percentage by mass: 92-99.95% of polymer emulsion, and 0.05-8% of carbon nanotubes. A preparation method of the carbon nanotube polymer composite conductive material comprises the following steps that firstly, the carbon nanotube is dispersed in an aqueous solution through a dispersing agent and then evenly mixed with the polymer emulsion, an electrolyte solution is added to enable the carbon nanotubes to lose stability to form a mutually-connected gel network, thus agglomeration of the polymer emulsion is avoided, and drying is conducted. The carbon nanotube polymer composite conductive material and the preparation method have the beneficial effects that random distribution of the carbon nanotubes in polymer is effectively improved, the addition quantity of the carbon nanotubes is decreased, the contactresistance between the carbon nanotubes is lowered, and the conductivity of the composite material is improved; related equipment is simple, the operation process is simple and easy, and mass production is achieved advantageously; and water serves as the solvent, an organic solvent or toxic substances are avoided, and environmental pollution is avoided.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a carbon nanotube polymer composite conductive material prepared by a colloid agglomeration method and a preparation method thereof. technical background [0002] Polymer polymer materials are widely used in daily life and industrial production activities due to their light weight, low density, excellent mechanical properties, insulation properties, and heat insulation properties. With the development of modern science and technology, especially the rapid development of electronic industry and communication technology, the demand for polymer materials with conductive properties is increasing day by day. Conductive polymers are classified into intrinsic conductive polymers and composite conductive polymers. Intrinsic conductive polymers are difficult to dissolve and melt, difficult to shape, have poor conductivity stability, and need to add dopants. Most of them have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/24H01B13/00
Inventor 谢德龙邓卫斌盛鑫鑫李军陆文宇吴华梅毅
Owner KUNMING UNIV OF SCI & TECH
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