Effect of pH Value on Morphology of HAPw-nmZnO-nmCaO Composite Materials.

doi:10.13701/j.cnki.kqyxyj.2017.06.002

Abstract

Abstract: Objective: To investigate the effects of pH on the morphology of hydroxyapatite whisker (HAPw) modified by nano zinc oxide (nmCaO) and nano calcium oxide (nmZnO). Methods: Under the condition of 70℃, different pH=6.0, 6.2, 6.4, 6.6, 6.8, 7.0, using the zinc nitrate and calcium nitrate as the source of zinc and calcium, the hydroxyapatite whisker was modified by sol-gel method. The phase composition and surface morphology of the materials were analyzed by X ray diffraction (XRD), transmission electron microscope (TEM), and X ray energy dispersive spectroscopy (EDX). Results: Under different pH conditions, the distribution of the zinc oxide and calcium oxide nanoparticles on the HAPw surface was different. The shape of nano-ZnO and nano-CaO were six crystal particle and round granular, respectively. The particles and the whiskers were bonded by chemical bonds. Conclusion: With calcium nitrate and zinc nitrate as raw materials, the hydroxyapatite whisker was modified by sol-gel method, and the optimal pH was 6.2 and 6.4.

Key words: Zinc oxide , Calcium oxide , Hydroxyapatite whisker, Sol-gel method , pH

CLC Number:

R783.1

SUN Shi-jia, ZHAO-Qiang, YUAN Yan-bo, HE Wu-shu, ZHANG Wen-yun, CHEN Qing-hua, SU Jun.. Effect of pH Value on Morphology of HAPw-nmZnO-nmCaO Composite Materials.[J]. Journal of Oral Science Research, 2017, 33(6): 585-588.

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