Effect of ceramics/polymer heterointerface on dielectric property of self-assembled BaTiO<sub>3</sub>/poly-L-lactic acid composite materials
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- TAKEDA Mariko
- Graduate School of Integrative Science and Engineering, Tokyo City University
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- YOSHINO Kentaro
- Graduate School of Integrative Science and Engineering, Tokyo City University
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- ITO Akira
- Mitsubishi Gas Chemical Co., Inc., Planning & Development Division, Specialty Chemicals Company
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- TANIMURA Makoto
- Research Initiatives and Promotion Organization, Instrumental Analysis Center, Yokohama National University
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- INOUE Yasuhide
- Kagami Memorial Research Institute for Materials Science and Technology, Waseda University
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- KOYAMA Yasumasa
- Kagami Memorial Research Institute for Materials Science and Technology, Waseda University
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- MUNAKATA Fumio
- Graduate School of Integrative Science and Engineering, Tokyo City University
抄録
<p>The dispersion state of barium titanate (BT) particle groups in self-assembled BT/poly-L-lactic-acid (PLLA) composites prepared under different fabrication conditions was investigated. In particular, the BT/PLLA/BT heterointerface in the BT aggregates by the self-assembly process was analyzed and the effect of the BT/PLLA/BT heterointerface and the BT/BT interface on the dielectric properties of BT/PLLA composites were investigated. BT/PLLA composites were fabricated by adding BT particles and BT granules with low and high-speed kneading conditions. The volume fraction of BT in composites varied from 5 to 20 vol.%. The BT aggregates having a BT/PLLA/BT heterointerface were formed under the low-speed kneading condition and the BT agglomerates having a BT/BT interface were formed under the high-speed kneading condition within the self-assembly process. The tan δ of the BT/PLLA composite of self-assembled BT aggregates having the BT/PLLA/BT heterointerface was lower than that of the BT granules having the BT/BT interface. The dielectric constant (ε′) of the self-assembled composite was increased by growing an average secondary particle area of BT fillers. In contrast, the average secondary particle area of BT granules was increased, as compared with 5 vol.% of BT. However, the change in ε′ was saturated. The slopes of the change in the ε′ depending on the secondary particle area of BT fillers were different between the self-assembled BT aggregates having the BT/PLLA/BT heterointerface and the BT granules having the BT/BT interface. Thus, it was suggested that it was an important role in improving the dielectric properties to form ceramic secondary particle groups having the ceramics/polymer/ceramics heterointerface by the self-assembly process.</p>
収録刊行物
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 129 (3), 135-142, 2021-03-01
公益社団法人 日本セラミックス協会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390568772522899840
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- NII論文ID
- 130007993683
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- ISSN
- 13486535
- 18820743
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可