Piezoelectric Motion of Poly(l-lactic acid) Film Improved by Supercritical CO2 Treatment

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概要

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• Poly(l-lactic acid) (PLLA), which is a type of chiral polymer, was subjected to a supercritical CO2 (s-CO2) treatment to change its high-order structure, realizing an improvement in its piezoelectricity. The piezoelectric constant $e$ of the PLLA film treated with s-CO2 (sco2-PLLA) was twofold higher than that of the PLLA film fabricated by the conventional method. From observation by atomic force microscopy (AFM), it was found that, upon treatment with s-CO2, the grain structure of the sco2-PLLA film became homogeneous, in comparison with that in the PLLA film without s-CO2 treatment. Then, we confirmed that, using the sco2-PLLA film, vibration control using a negative-capacitance circuit could be more efficiently carried out than that using the PLLA film without s-CO2 treatment.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2009-09-25

著者

• IMOTO Kenji

  Imoto Mechanical Engineering Co., Ltd.

• DATE Munehiro

  Kobayashi Institute of Physical Research

• FUKADA Eiichi

  Kobayashi Institute of Physical Research

• Tajitsu Yoshiro

  Electrical Engineering Department, Graduate School of Engineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan

• Tahara Komei

  Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan

• Kamaiyama Yoshihiro

  Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan

• Yamakita Takahiro

  Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan

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