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J. Korean Ceram. Soc. > Volume 39(11); 2002 > Article
Journal of the Korean Ceramic Society 2002;39(11): 1097.
doi: https://doi.org/10.4191/kcers.2002.39.11.1097
합성 Hydroxyapatite/Polyacrylic Acid 균질복합체의 제조 및 특성
이석기, 이형동1, 신효순1, 이병교1
경일대학교 공업화학과
1경북대학교 무기재료공학과
Preparation and Characterization of Synthetic Hydroxyapatite/Polyacrylic Acid Homogeneous Composite
Suk-Kee Lee, Hyung-Dong Lee1, Hyo-Soon Shin1, Byung-Kyo Lee1
Department of Industrial Chemistry, Kyungil University
1Department of Inorganic Materials Engineering, Kyungpook National University
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.
Key words: Wet-precipitation process, Synthethic hydroxyapatite, Polyacrylic acid, Homogeneous composite, Ionic bond
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