Preparation method of carbon nanotube yarn

Abstract

The invention relates to a method for preparing carbon nanotube yarn, which comprises the following steps: providing a plurality of carbon nanotube arrays; pulling from one carbon nanotube array to obtain a first carbon nanotube structure; Pulling to obtain a second carbon nanotube structure; along the stretching direction, one end of the second carbon nanotube structure is in contact with the end of the first carbon nanotube structure close to the carbon nanotube array to obtain a length-extended carbon nanotube structure; repeating the above extending steps to further extend the length of the carbon nanotube structure; and obtaining a carbon nanotube yarn by using an organic solvent to treat the above carbon nanotube structure.

Description

Technical field

[0001] The invention relates to a method for preparing carbon nanotube materials. In particular, it relates to a preparation method of carbon nanotube yarn. Background technique

[0002] Carbon nanotube is a hollow tube rolled from graphene sheets, which has excellent mechanical, thermal and electrical properties. The application fields of carbon nanotubes are very broad. For example, it can be used to make field effect transistors, atomic force microscope tips, field emission electron guns, nano templates, and so on. In particular, Fan Shoushan et al. in Nature, 2002, 419:801, Spinning Continuous CNT Yarns, disclosed a pure carbon nanotube yarn drawn from a super-aligned carbon nanotube array. This carbon nanotube yarn includes A plurality of carbon nanotube segments connected end to end under van der Waals force, each carbon nanotube segment has approximately the same length, and each carbon nanotube segment is composed of multiple parallel carbon nanotubes. G...

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