Novel Composite of Nano-Sized SiO₂/Chitosan Induce the Growth of HAp Crystal

Abstract:

A novel hybrid material of chitosan/nano-sized SiO2/hydroxyapatite (HAp) composite was prepared through a biomimetic approach. HAp deposited in situ on the surface of chitosan/ nano-sized SiO2 composite film in simulate body fluid (SBF) solution at 36.5°C. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) were performed to study composition and morphological characteristics of the HAp crystal. The results indicated that nano-sized SiO2 dispersed in the chitosan film provided initial nucleation sites for the growth of the HAp in SBF solution by adsorbing further PO4 3−, Ca2+ due to the induction of HAp formed. The strength of the composite was largely improved because of the addition of nano-sized SiO2.

• Periodical: Key Engineering Materials (Volumes 361-363)
• Pages: 483-486
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.361-363.483
• Online since: November 2007
• Authors: Shao Wei Huang, Xu Dong Wang, Weng Juan Zhang, Chang Lu, Zhi Hong Zhu, Xin Tang Huang, Yan Zeng
• Keywords: Chitosan (CS), Crystal Growth, HAp, Nano Sized SiO₂

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