Technology Developed for Manufacturing Spinnable Multi-walled Carbon Nanotubes

January 28, 2013

 SHJ Consortium established by JNC Corporation (head office: Chiyoda-ku, Tokyo, President: Michio Morita), National University Corporation Shizuoka University (Shizuoka-shi, Shizuoka, President: Yukihiro Ito) and Hamamatsu Carbonics Corporation (head office: Hamamatsu-shi, Shizuoka, President: Tomoyuki Ikedo) has developed the technology for manufacturing spinnable multi-walled carbon nanotubes (hereinafter, referred to as CNT).

 ICNT is formed of cylindrical macrocrystal molecules in which carbon atoms are arranged in a net form, and has features such as high electrical conductivity, high thermal conductivity and high strength, and is extremely lightweight. Therefore, CNT is expected to be the next-generation material to replace carbon fibers or copper wire used for airframes, motors of electric vehicles or the like.

 Currently available CNT is not only short, having a length from several microns to several hundreds of microns, but also low in dispersibility in water or organic solvents, and therefore has problems such as needing pretreatment for dispersing CNT into solvents upon processing into fibers or sheets. Thus, a development has been strongly desired for CNT that solves these problems.

 CNT to be manufactured by the technology recently developed by the Consortium is extremely long having a length of several millimeters on a substrate, and also can be manufactured at high-speed, and the long CNT can be continuously spun over 50 meters from the substrate. Thus, the pretreatment for dispersion of solvents or the like becomes unnecessary upon spinning CNT, and therefore reduction of steps for making the products and cost reduction can be expected.


 From now on, the Consortium will develop mass production apparatus for CNT based on the technology, and simultaneously plans to start manufacture aiming at April 2015 for marketing CNT for fiber or sheet products. At the same time, the Consortium plans to provide a small amount of samples to customers.

 In addition, we will make a presentation of the product in "nano tech 2013, the 12th International Nanotechnology Exhibition & Conference" to be held from January 30 (in Tokyo Big Site) (SHJ Consortium, booth: 5K-10).