High Ionic Conductivity of Transparent Film of Hydroxyapatite and Poly(vinyl alcohol) Nanocomposite |
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| Authors: | Yoshiro Tajitsu Kazuyuki Fukuda Tosiyuku Takaki |
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| Institution: | 1. Graduate School of Engineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan;2. Material Science Laboratory, Mitsui Chemicals, Inc., Chiba, Japan |
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| Abstract: | Summary: Hydroxyapatite (HAp)-polyvinyl alcohol (PVA) nanocomposite film containing Li+ was designed as a solid polymer electrolyte. A composite was prepared by reacting Ca(OH)2 with H3PO4 in the presence of PVA which is denatured in order to have the carboxyl group, and a LiN(CF3SO2)2 was added. HAp particles were commonly formed in the shape of spindles (long axis ca. 80 nm and short axis ca. 25 nm). The obtained nanocomposite film, in which HAp particles were dispersed uniformly, is transparent, flexible and drawable. Its ionic conductivity is about 10−3 S/m at room temperature. This value is very large. This high ionic conductivity is considerable on the basis of the dynamic percolation theory. |
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| Keywords: | films hydroxyapatite Ionic conductivity nanocomposite |
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