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

研究成果: Conference contribution

抄録

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.

本文言語	English
ホスト出版物のタイトル	ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials
出版社	European Conference on Composite Materials, ECCM
ISBN（電子版）	9783000533877
出版ステータス	Published - 2016
イベント	17th European Conference on Composite Materials, ECCM 2016 - Munich, Germany 継続期間: 2016 6 26 → 2016 6 30

Other

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

ASJC Scopus subject areas

Ceramics and Composites

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引用スタイル

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AU - Kim, Taesung

AU - Nikawa, Hidefumi

AU - Hosoi, Atsushi

AU - Kawada, Hiroyuki

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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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KW - Densification

KW - Graphitization

KW - Heat treatment

KW - High strength

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