• Title/Summary/Keyword: Synthethic hydroxyapatite

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Preparation and Characterization of Synthetic Hydroxyapatite/Polyacrylic Acid Homogeneous Composite (합성 Hydroxyapatite/Polyacrylic Acid 균질복합체의 제조 및 특성)

  • Lee, Suk-Kee;Lee, Hyung-Dong;Shin, Hyo-Soon;Lee, Byung-Kyo
    • Journal of the Korean Ceramic Society
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    • v.39 no.11
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    • pp.1097-1102
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    • 2002
  • Hydroxyapatite(HAp) powders were synthesized by wet-precipitation precess using $Ca(NO_3)_2{\cdot}4H_2O$ and $(NH_4)_2HPO_4$ and homogeneous composites of four type were prepared by mixing of synthetic HAp and Polyacrylic Acid(PAA). Ca/P ratio of synthetic HAps was determined using ICP analysis and the thermal property of HAp/PAA composites were investigated by TGA. Good crystalline HAp was obtained at pH 11 and $60{\circ}C$. The ratio of Ca/P in synthetic HAps was quantified in a range of 1.35~1.49, from which Ca-deficient HAp was obtained. The specific surface area of HAp/PAA composite increased with increasing the content of PAA and the weight loss of HAp/PAA composite at $800{\circ}C$ decreased in a range of 3.5~9.6% due to the degradation of PAA binder. From FT-IR analysis of HAp/PAA composite, it was confirmed that the ionic bond between ion of HAp and carboxyl group of PAA was formed.