The influence of methylcellulose (MC) on solubility of calcium hydroxyapatite (HA) crystals in HA/MC nanocomposites


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Abstract

The influence of methylcellulose ([C6H7O2(OH)3–x(OCH3)x]n, MC) on the morphology and solubility of calcium hydroxyapatite (Ca10(PO4)6(OH)2, GA) nanocrystals (NCs) in GA/MC organomineral nanocomposites (OMCs) is studied. GA/MC OMCs with the MC content of 0.5, 1, 2, 5, 10 and 20 wt % are synthesized in the Ca(OH)2–H3PO4–[C6H7O2(OH)3–x(OCH3)x]n–H2O system under biomimetic conditions (37°C). The composition and structural features of OMCs, as well as crystallographic characteristics, size, and morphology of GA NC in OMCs, are determined via chemical analysis, X-ray diffraction (XRD), infrared spectroscopy (IRS), thermal analysis (DTA and DTG), scanning (SEM) and transmission (TEM) electron microscopy, and electron diffraction (ED). It is shown that the growth in the MC concentration in OMCs leads to the change in the GA NC morphology and the increase in their solubility (for Ca2+ and PO43- ions).

About the authors

N. A. Zakharov

Kurnakov Institute of General and Inorganic Chemistry

Author for correspondence.
Email: zakharov@igic.ras.ru
Russian Federation, Moscow

M. Yu. Sentsov

Kurnakov Institute of General and Inorganic Chemistry

Email: zakharov@igic.ras.ru
Russian Federation, Moscow

M. R. Kiselev

Frumkin Institute of Physical Chemistry and Electrochemistry

Email: zakharov@igic.ras.ru
Russian Federation, Moscow

V. A. Klyuev

Frumkin Institute of Physical Chemistry and Electrochemistry

Email: zakharov@igic.ras.ru
Russian Federation, Moscow

V. T. Kalinnikov

Kurnakov Institute of General and Inorganic Chemistry

Email: zakharov@igic.ras.ru
Russian Federation, Moscow

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