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Carbon nanotube dispersion with improved workability and preparation method therefor

一种碳纳米管、分散体的技术，应用在碳纳米管、纳米碳、化学仪器和方法等方向，能够解决除去麻烦等问题，达到改善分散性、抑制粘度的增加的效果

Active Publication Date: 2019-02-05
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in the case of dry pulverization, additives are used so that the additives act as impurities and it is troublesome to remove them

Method used

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  • Carbon nanotube dispersion with improved workability and preparation method therefor
  • Carbon nanotube dispersion with improved workability and preparation method therefor
  • Carbon nanotube dispersion with improved workability and preparation method therefor

Examples

Experimental program
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preparation example Construction

[0075] The method of dispersing the carbon nanotubes prepared by the preparation method according to the present invention in the liquid dispersion medium may be any method and is not particularly limited.

[0076] The carbon nanotube dispersion prepared by the method according to the present invention can be effectively used in the manufacture of electrodes of electrochemical storage devices such as secondary batteries, fuel cells or supercapacitors, electromagnetic wave shielding materials, field emission displays or gas sensors.

[0077] Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

[0078] Physical properties in Examples were measured as follows, and all physical properties were measured at ambient temperature.

[0079] -Bulk de...

Embodiment 1

[0090] will have about 40kg / m 3 Bulk density, 185m 2 Stranded carbon nanotubes with a BET specific surface area of ​​ / g and an average length of 30 μm were ground at a speed of 500 rpm in a mill (KMtech, KMA-3) containing zirconia balls with a diameter of 2 mm 10, 15, 20, 60 and 80 minutes. Then, the bulk density, wettability index and powder resistivity were measured, the results of which are shown in Table 1. Pulverized carbon nanotubes have a length of 0.2 to 10 μm and a length of 200 to 280 m 2 / g of BET specific surface area.

[0091] In addition, the viscosity and the maximum concentration dispersible in NMP were measured. The maximum concentration is defined as the highest concentration in the concentration of the solution that can operate the dispersing equipment (GEA niro soavi (GEA niro soavi) company, PandaPLUS 2000) when using the same dispersant and equipment, wherein Concentrations are weight percent of carbon nanotubes based on the total weight of the dispe...

Embodiment 2

[0095] will have about 40kg / m 3 Bulk density, 185m 2 Strand carbon nanotubes with a BET specific surface area per gram and a length of 30 μm were milled at a speed of 300 rpm for 60, 80, 100 and 140 minutes in a mill containing zirconia balls with diameters of 3 mm and 5 mm. Then, the bulk density, wettability index and powder resistivity were measured, and the results are shown in Table 2. Pulverized carbon nanotubes have a length of 0.2 to 10 μm and a length of 260 to 280 m 2 / g of BET specific surface area.

[0096] In addition, the viscosity and the maximum concentration dispersible in NMP were measured. The maximum concentration is the weight percent of carbon nanotubes based on the total weight of the dispersion.

[0097] [Table 2]

[0098]

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Abstract

The present invention can increase the maximum concentration of carbon nanotubes addable to a dispersion solvent and can improve the workability of a carbon nanotube dispersion liquid by dry-pulverizing carbon nanotubes to control the wettability index of carbon nanotubes. In addition, through the use of the above feature, the maximum concentration of carbon nanotubes addable to a dispersion solvent can be easily predicted.

Description

technical field [0001] This application claims the benefit of priority of Korean Patent Application No. 10-2017-0001673 filed on Jan. 5, 2017, the entire disclosure of which is incorporated herein by reference. [0002] The present invention relates to a carbon nanotube dispersion with improved dispersibility and a method for preparing the same. Background technique [0003] Carbon nanotubes exhibit non-conductive, conductive or semiconductive properties depending on their specific chirality, and have carbon atoms linked by strong covalent bonds. Therefore, the tensile strength of carbon nanotubes is about 100 times higher than that of steel. Carbon nanotubes are excellent in flexibility and elasticity, and have chemically stable characteristics. Due to this size and specific physical properties, carbon nanotubes are of industrial importance in the production of composite materials and have high utility in the fields of electronic materials, energy materials, etc. For exa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/158C01B32/176C01B32/174
CPCC01B32/158C01B32/174C01B32/176C01B2202/26C01B2202/34C01B2202/32C01B2202/28C01P2006/11C01P2006/22
Inventor 尹载根曹东铉金成真姜京延
Owner LG CHEM LTD
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