Piezoelectric Characteristics of Polymer Film Oriented under a Strong Magnetic Field
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- Nakiri Takuo
- Graduate School of Engineering, Kansai University Kansai Tech Co., Inc.
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- Imoto Kenji
- Imoto Mechanical Engineering Co., Ltd.
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- Ishizuka Masayuki
- Sumitomo Heavy Industry Co., Ltd.
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- Okamoto Satoshi
- Sumitomo Chemical Co., Ltd.
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- Date Munehiro
- Kobayashi Institute of Physical Research
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- Fukada Eiichi
- Kobayashi Institute of Physical Research
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- Tajitsu Yoshiro
- Graduate School of Engineering, Kansai University
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Abstract
The possibility has been indicated that polymers with helical chirality, such as poly-γ-benzyl-L-glutamate (PBLG) and poly-L-lactic acid (PLLA), exhibit a large shear piezoelectric constant. To attempt the realization of a PBLG membrane with a large piezoelectric constant, we fabricated the PBLG membrane oriented by magnetic field force. Concretely, the PBLG membranes were casted from 1,2-dichloroethane solution with various PBLG concentrations under the magnetic field generation equipment incorporating a superconducting magnet. First, the orientation of the chain molecules of the PBLG membranes obtained was observed macroscopically by means of a polarizing microscope (POM). The orientation of the chain molecules of the PBLG membranes was recognized for the case of casting from the PBLG 1,2-dichloroethane solution in the liquid crystal state. Also, from X-ray photograph measurements, it was found that the orientation direction of the chain molecules of PBLG was perpendicular to the magnetic field direction. We then measured the shear piezoelectric constant d14 of the oriented PBLG membranes. With increasing the strength of the applied magnetic field in the casting process for the film preparation, d14* of the PBLG membranes obtained increases. Finally, a large piezoelectric constant of 26 pC/N was found in the PBLG membrane. It is assumed that d14* is not saturated even at the magnetic field of 10 T.
Journal
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 43 (9B), 6769-6774, 2004
The Japan Society of Applied Physics
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Details 詳細情報について
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- CRID
- 1390001206265421312
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- NII Article ID
- 10013612545
- 210000056475
- 130004532912
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- NII Book ID
- AA10457675
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- ISSN
- 13474065
- 00214922
- http://id.crossref.org/issn/13474065
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- NDL BIB ID
- 7107034
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed