Development of untwisted carbon nanotube yarn with high strength by heat treatment

Taesung Kim, Hidefumi Nikawa, Atsushi Hosoi, Hiroyuki Kawada

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    Carbon nanotube (CNT) is increasingly applied as a reinforcement of polymer matrix composite because of extremely high mechanical properties. Among several forms of CNT reinforcement, CNT yarn can be a next-generation reinforcement which enables the use of CNTs in the macro-scale. In this study, untwisted CNT yarns were fabricated by the dry spinning method using a die and graphitized in order to develop CNT yarns with high strength and stiffness. Impure materials and defective structures on MWCNTs were removed after graphitization treatment. G/D ratio was improved more than 10 times. Stress transfer between constituent MWCNTs of CNT yarns became more effectively by removing impure materials. Consequently, macroscopic mechanical properties of CNT yarns were improved by the graphitization treatment in addition to improvement of MWCNT itself.

    Original languageEnglish
    Title of host publicationECCM 2016 - Proceeding of the 17th European Conference on Composite Materials
    PublisherEuropean Conference on Composite Materials, ECCM
    ISBN (Electronic)9783000533877
    Publication statusPublished - 2016
    Event17th European Conference on Composite Materials, ECCM 2016 - Munich, Germany
    Duration: 2016 Jun 262016 Jun 30


    Other17th European Conference on Composite Materials, ECCM 2016


    • Carbon nanotube yarn
    • Densification
    • Graphitization
    • Heat treatment
    • High strength

    ASJC Scopus subject areas

    • Ceramics and Composites

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