Effects of GumArabic on Properties of Collagen-hydroxyapatite Composite

doi:10.3724/SP.J.1077.2011.00038

Abstract

Abstract: In order to improve the interfacialbonding properties of collagen-hydroxyapatite (Col-HA) composite, gum Arabicwas introduced in the system. Ca(NO₃)₂?4H₂O, (NH₄)₂HPO₄, aciddissolved collagen, and gum Arabic were used as the raw materials to in situ preparecollagen-hydroxyapatite/gum Arabic (Col-HA/Gum A) composite. Crystallite phase,chemical composition, and micro-morphology of the composite were characterizedby XRD, FT-IR, and SEM. The effects of gum Arabic on the structure andproperties of the collagen-hydroxyapatite composite were analyzed. The resultsindicate that both the interface structure and the surface morphology of thecollagen-hydroxyapatite composite are changed by the introduction of gumArabic. With increasing the amount of gum Arabic in the system, the sizes ofthe crystal grain and the crystallinity of the Col-HA composite are decreased.Both the hydrophilic properties and the enzymatic degradation capacity <>invitro of the composite are decreased significantly (P<0.01), whilst the mechanical properties of the composite areimproved in a certain range. Complexes of protein-polysaccharide can be formedbetween the gum Arabic and the collagen or collagen-hydroxyapatite, and the gumArabic can act as a cross-linking agent in the new composite.

Key words: comoposite, collagen-hydroxyapatite composite, gum Arabic, effects

CLC Number:

TB303
TB332

FENG Wen-Po,QI Yuan-Ming, TANG Ke-Yong. Effects of GumArabic on Properties of Collagen-hydroxyapatite Composite[J]. Journal of Inorganic Materials, 2011, 26(1): 38-42.

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