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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.116  No.1349 (January) (2008)  >  pp.100-104

Journal of the Ceramic Society of Japan
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TEM observation of hydroxyapatite nanocrystals ionically-bonded onto the graftpolymer-modified PET substrate

Atsutomo NAKAMURA1), Atsumasa SHISHIDO1), Ippei KISHIDA1), Masahiro OKADA2), Tsutomu FURUZONO2) and Yoshiyuki YOKOGAWA1)
1) Graduate School of Mechanical and Physical Engineering, Osaka City University
2) Department of Bioengineering, National Cardiovascular Center Research Institute

  The crystallographic orientation relationship between hydroxyapatite (HAp) nanocrystals and poly (acrylic acid) (PAA) graftpolymer-modified poly (ethylene terephthalate) (PET) substrate was studied using transmission electron microscopy (TEM). We observed the microstructure of fabricated rod-like HAp nanocrystals and the interface of HAp/PET composite where, the HAp nanocrystals are bonded onto PAA graftpolymer-modified PET substrate. The selected-area electron diffraction (SAED) pattern of interface of the HAp/PET composite indicated that some low index planes in HAp prism plane tended to be contact plane with the PET substrate surface. In particular, the {1120} plane was distinctly found as the contact plane with PET substrate. In this material, it has been reported that the carboxyl groups of PAA graft-polymer are ionically-bonded with Ca ions on surface of the HAp nanocrystal. It was suggested that the periodic ionic arrangements of the {1120} plane play an important role on the bonding between the HAp nanocrystals and the carboxyl groups of graft-polymer on the PET substrate.

Hydroxyapatite, Composite, Biomaterial, Interface, Transmission electron microscopy

Received: October 12, 2007
Accepted: December 11, 2007 , Published online: January 01, 2008
Copyright (c) 2008 The Ceramic Society of Japan



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