US 11,866,330 B2
Method for manufacturing carbon nanotube, method for manufacturing carbon nanotube assembled wire, method for manufacturing carbon nanotube assembled wire bundle, carbon nanotube manufacturing apparatus, carbon nanotube assembled wire manufacturing apparatus, and carbon nanotube assembled wire bundle manufacturing apparatus
Takeshi Hikata, Osaka (JP); Toshihiko Fujimori, Osaka (JP); Soichiro Okubo, Osaka (JP); Jun Otsuka, Osaka (JP); and Jun-ichi Fujita, Tsukuba (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP); and UNIVERSITY OF TSUKUBA, Tsukuba (JP)
Appl. No. 17/433,019
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP); and UNIVERSITY OF TSUKUBA, Tsukuba (JP)
PCT Filed Feb. 18, 2020, PCT No. PCT/JP2020/006205
§ 371(c)(1), (2) Date Aug. 23, 2021,
PCT Pub. No. WO2020/171047, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 2019-030644 (JP), filed on Feb. 22, 2019; and application No. 2019-160766 (JP), filed on Sep. 3, 2019.
Prior Publication US 2022/0153585 A1, May 19, 2022
Int. Cl. C01B 32/162 (2017.01)
CPC C01B 32/162 (2017.08) [C01P 2004/61 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method for manufacturing a carbon nanotube comprising:
a mist generating step of generating a mist including a catalyst particle and a liquid carbon source;
a growing step of growing a carbon nanotube from the catalyst particle by heating the mist; and
a drawing step of drawing the carbon nanotube that is obtained in the growing step by applying a tensile force to the carbon nanotube, wherein the tensile force is applied to the carbon nanotube in a direction toward a downstream side by varying a carrier gas in flow velocity by making an average flow velocity of the carrier gas on the downstream side larger than an average flow velocity of the carrier gas on an upstream side.