Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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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 (Department of Industrial Chemistry, Kyungil University) ;
  • Lee, Hyung-Dong (Department of Inorganic Materials Engineering, Kyungpook National University) ;
  • Shin, Hyo-Soon (Department of Inorganic Materials Engineering, Kyungpook National University) ;
  • Lee, Byung-Kyo (Department of Inorganic Materials Engineering, Kyungpook National University)
  • 이석기 (경일대학교 공업화학과) ;
  • 이형동 (경북대학교 무기재료공학과) ;
  • 신효순 (경북대학교 무기재료공학과) ;
  • 이병교 (경북대학교 무기재료공학과)
  • Published : 2002.01.01
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Abstract

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.

$Ca(NO_3)_2{\cdot}4H_2O$와 $(NH_4)_2HPO_4$를 사용하여 습식침전법으로 수산화아파타이트(HAp) 분말을 합성하고, 합성된 HAp와 폴리아크릴산(PAA)을 혼합하여 균질의 복합체 4종을 제조하였다. 합성 HAp는 ICP 분석으로 Ca/P비를 정량하였고, HAp/PAA 복합체는 TGA로 열적 성질을 조사하였다. pH 11 및 $60{\circ}C$에서 합성된 HAp의 결정성이 가장 우수하였고, Ca/P비는 1.35~1.49의 범위로 정량되어 Ca 결손의 HAp를 얻었다. HAp/PAA 복합체에서 PAA의 양이 증가함에 따라 비표면적이 증가하였다. 또한 HA/PAa 균질복합체의 $800{\circ}C$에서 무게감량은 3.5~9.6%의 범위로 감소하여 바인더인 PAA가 분해되는 것을 알 수 있었다. HAp/PAA 복합체의 FT-IR 분석결과, HAp의 $Ca^{2+}$ 이온과 PAA의 카르복실기 사이에서 이온결합이 형성되는 사실을 확인할 수 있었다.

Keywords

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