Heterogeneous Nucleation of Hydroxyapatite-collagen Nanocomposite

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J. Korean Ceram. Soc. > Volume 38(11); 2001 > Article

Journal of the Korean Ceramic Society 2001;38(11): 1030.

Hydroxyapatite-collagen 나노복합재료에서의 불균질 핵생성

장명철

군산대학교 재료·화학공학부

Heterogeneous Nucleation of Hydroxyapatite-collagen Nanocomposite

ABSTRACT

Hydroxyapatite[COL] nanocomposite was prepared through coprecipitation process. The chemical bond formation between HAP and COL was confirmed by diffusive reflectance FT-IR and TEM observation. Higher concentration of COL in the preparation induced tiny nanocrystalline composite particles, but lower concentration of COL contributed to form the well developed HAP particles. From TEM observation and ED(Electron Diffraction) pattern the embedded HAP nanoparticles were oriented along the c-axis of COL fiber. In an aqueous system of constant [Ca$^$2+/] and [PO$_4$$^$3-/], quantity of soluble COL matrix was doing an important role of controlling the heterogeneous nucleation site for the formation of HAP nanocrystals. Higher concentration of COL will provide more nucleation sites for Ca$^$2+/ and so the concentration of calcium ions for the total number of active nucleation sites will be getting relatively dilute.

Key words: Hydroxyapatite, Collagen, Nanocomposite, Heterogeneous nucleation