ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this work, we studied the surface/water interaction properties of a pure calciumhydroxyapatite (HA) and their modifications as a consequence of the partial Ca2+/Mg2+ (MHA)substitution by means of IR spectroscopy and microcalorimetry of adsorbed water. IR dataindicated that water molecules in direct contact with the surface of HA are coordinated to surfacecations and experience H-bond significantly stronger than in liquid water. The heats of adsorptionassociated to such interactions are very high, being twice-triple the heat of liquefaction of water.Interestingly, water experiences H-bond higher than in its bulk liquid state also in the second layer.Finally the entering in the material of Mg2+ ions was shown to significantly affect the affinity of thematerial toward water and the properties of its hydration layers
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.361-363.87.pdf
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