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

Taesung Kim; Hidefumi Nikawa; Atsushi Hosoi; Hiroyuki Kawada

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 proceeding › Conference contribution

Abstract

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 language	English
Title of host publication	ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials
Publisher	European Conference on Composite Materials, ECCM
ISBN (Electronic)	9783000533877
Publication status	Published - 2016
Event	17th European Conference on Composite Materials, ECCM 2016 - Munich, Germany Duration: 2016 Jun 26 → 2016 Jun 30

Other

Other	17th European Conference on Composite Materials, ECCM 2016
Country	Germany
City	Munich
Period	16/6/26 → 16/6/30

Keywords

Carbon nanotube yarn
Densification
Graphitization
Heat treatment
High strength

ASJC Scopus subject areas

Ceramics and Composites

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Development of untwisted carbon nanotube yarn with high strength by heat treatment. / Kim, Taesung; Nikawa, Hidefumi; Hosoi, Atsushi ; Kawada, Hiroyuki.

ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials. European Conference on Composite Materials, ECCM, 2016.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AB - 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.

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