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Chelate Bonding Mechanism in a Novel Magnesium Phosphate Bone Cement
Author(s) -
Christel Theresa,
Christ Susanne,
Barralet Jake E.,
Groll Jürgen,
Gbureck Uwe
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13491
Subject(s) - chelation , cement , magnesium phosphate , dissolution , precipitation , magnesium , cementitious , phosphate , compressive strength , phytic acid , chemistry , nuclear chemistry , raw material , materials science , chemical engineering , inorganic chemistry , metallurgy , composite material , organic chemistry , biochemistry , physics , meteorology , engineering
A novel approach to harden magnesium phosphate cements was tested using phytic acid (C 6 H 18 O 24 P 6 ) solutions as chelation agent. In addition to complex formation, a cementitious dissolution and precipitation reaction led to the formation of newberyite (Mg HPO 4 ·3H 2 O) as the hydrated form of the farringtonite [Mg 3 ( PO 4 ) 2 ] raw powder. The set cements showed good mechanical properties (up to 65 MPa in compression) displaying a doubling of the compressive strength of conventional newberyite forming cements despite of a significantly lower degree of cement conversion. An increasing phytic acid concentration from 10% to 30% had a retarding effect on the setting time (11–16 min), decreased the pH close to acidic conditions ( pH = 5–4) and increased the maximum setting temperature (26°C–31°C), but none of these factors reached critical values. The presented strategy was successful in fabricating a good workable, novel mineral biocement with promising characteristics for biomedical applications.