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Carbon nanotube dispersion
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A technology of carbon nanotubes and dispersion liquid, applied in the direction of carbon nanotubes, nanocarbons, nanotechnology, etc., can solve the problems of poorly dispersed carbon nanotubes, unrecorded, insufficient dispersion, etc., and achieve low surface resistance value, high Effect of transparency and high dispersion
Pending Publication Date: 2021-04-02
OSAKA SODA CO LTD
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[0005] Specifically, in the case of kneading carbon nanotubes with resin, etc., dispersion may not be sufficient, and due to poor dispersion, the performance corresponding to the amount of carbon nanotubes added may not be fully exhibited.
[0006] For example, in Patent Documents 1, 2, etc., although the dispersion state of carbon nanotubes in the resin is described, there is no detailed description about the specific method for dispersion.
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[0072] Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited to the following Example in the range which does not deviate from the summary. In addition, in the following examples and comparative examples, the compounding quantity means a mass part.
[0073] Carbon nanotubes (A) were evaluated using the following analysis equipment.
[0075] Using a thermogravimetric / differential thermal analyzer (Hitachi High-Tech Science Corporation STA7200RV), heat about 7 mg of a sample at an air flow rate of 200 cc / min from 30°C to 900°C at a heating rate of 10°C / min, and for 30°C to 900°C The weight loss ratio of the temperature range was evaluated.
[0076] In addition, with respect to the heating weight loss rate at 900°C measured from 30°C at a temperature increase rate of 10°C / min, it was measured at a temperature increase rate of 10°C / min from 30°C. The ratio of the heating weight loss rate ...
example 8
[0114] In thermogravimetric measurement, the rate of weight loss by heating to 900°C is 83% and the ratio of weight loss to 500°C is 8%
[0133] Polycarbonate resin (product name "Panlite 1225Y")
[0134] Total light tran...
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Abstract
The present invention addresses the problem of providing a dispersion of carbon nanotubes for forming molded articles that have high transparency and a low surface resistance value, and a carbon-nanotube-containing composition in which the dispersion is used. Provided is a dispersion having a specific Feret length when carbon nanotubes (A) are dispersed in a dispersion medium (B), the carbon nanotubes (A) having a weight loss on heating to 900 DEG C of 80% or greater in thermogravimetric measurement and a G / D ratio of 30 or higher in Raman spectroscopy. A molded article having high transparency and a low surface resistance value is obtained using a carbon-nanotube-containing composition in which the dispersion is used.
Description
technical field [0001] The present invention relates to a dispersion liquid of carbon nanotubes, a composition containing carbon nanotubes using the dispersion liquid, and a molded body of the composition containing carbon nanotubes. Background technique [0002] Carbon nanotubes are cylindrical substances with nanometer-sized diameters composed only of carbon atoms. They have attracted attention due to their structural characteristics such as electrical conductivity, thermal conductivity, mechanical strength, and chemical properties. In the energy field, the practical application in various applications is being researched. [0003] There are various types of carbon nanotubes, such as single-walled carbon nanotubes (hereinafter referred to as SWNTs), multi-layered multi-walled carbon nanotubes (hereinafter referred to as MWNTs), and double-layered carbon nanotubes belonging to the category of MWNTs. Double-walled nanotubes (hereinafter referred to as DWNT), etc.; in additi...
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