Mechanism for anisotropic thermal expansion of polyamide fibers

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

Research output: Contribution to journalArticlepeer-review

Abstract

This paper examines the validity of the contribution of entropy elasticity, which has been vaguely considered to be the main cause of the thermal expansion behavior of the untwisted fiber. Thereafter, we indicate the inconsistencies and propose a new possible physical principle. A new high-order structural model that can effectively cause anisotropic thermal expansion of fibers is proposed. The observed results verify our proposal, and further show its validity and correctness. The twisted fiber actuator, which has garnered significant attention in recent years, is driven by the anisotropic thermal expansion of an untwisted fiber, which is the precursor of the twisted fiber. Analyzing the physical principle of the thermal expansion behavior of the untwisted fiber is to obtain the knowledge for improving performance of the actuator.

Original languageEnglish
Article number130262
JournalSensors and Actuators, B: Chemical
Volume344
DOIs
Publication statusPublished - Oct 1 2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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