The origin of contraction of twisted polymer fiber muscles: whether the cause is entropic elasticity or thermal expansion

Daisuke Kimura, Toshihira Irisawa, Kentaro Takagi, Kenji Tahara, Daichi Sakurai, Haruhiko Watanabe, Wataru Takarada, Masatoshi Shioya*

*この研究の対応する著者

研究成果: Conference contribution

抄録

In recent years, polymer fiber actuators obtained by twisting polymer fibers have attracted much attention. These actuators actuate due to the reversible axial thermal contraction and radial thermal expansion of untwisted fibers. In this study, thermal contraction of the two polyamides, PA6 and PA610, fibers were investigated. The fiber length of both fibers changed reversibly in response to temperature change, but there was no initial load dependence on the amount of contraction. These results indicate that this thermal contraction is not due to the entropic elasticity effect seen in rubber. In addition, the thermal contraction was larger for PA610, which has a larger thermal expansion coefficient in the amorphous state. This suggests that the thermal expansion of the amorphous state was converted by its fiber structure into expansion in the diameter direction and contraction in the fiber axial direction [Kimura et al., Sens. Actuators B Chem., 2021].

本文言語English
ホスト出版物のタイトルElectroactive Polymer Actuators and Devices (EAPAD) XXIV
編集者Iain A. Anderson, John D. W. Madden, Herbert R. Shea
出版社SPIE
ISBN(電子版)9781510649590
DOI
出版ステータスPublished - 2022
外部発表はい
イベントElectroactive Polymer Actuators and Devices (EAPAD) XXIV 2022 - Long Beach, United States
継続期間: 2022 4月 62022 4月 11

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
12042
ISSN(印刷版)0277-786X
ISSN(電子版)1996-756X

Conference

ConferenceElectroactive Polymer Actuators and Devices (EAPAD) XXIV 2022
国/地域United States
CityLong Beach
Period22/4/622/4/11

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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