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High Ionic Conductivity of Transparent Film of Hydroxyapatite and Poly(vinyl alcohol) Nanocomposite
Author(s) -
Tajitsu Yoshiro,
Fukuda Kazuyuki,
Takaki Tosiyuku
Publication year - 2008
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200850803
Subject(s) - nanocomposite , vinyl alcohol , polyvinyl alcohol , materials science , ionic conductivity , ionic bonding , conductivity , composite number , electrolyte , chemical engineering , percolation (cognitive psychology) , polymer chemistry , polymer , composite material , chemistry , ion , organic chemistry , electrode , neuroscience , engineering , biology
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 H 3 PO 4 in the presence of PVA which is denatured in order to have the carboxyl group, and a LiN(CF 3 SO 2 ) 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.