A soft-chemistry approach to the synthesis of amorphous calcium ortho/pyrophosphate biomaterials of tunable composition

Mayen, L. and Jensen, N.D. and Laurencin, D. and Marsan, O. and Bonhomme, C. and Gervais, C. and Smith, M.E. and Coelho, C. and Laurent, G. and Trebosc, J. and Gan, Z. and Chen, K. and Rey, C. and Combes, C. and Soulié, J. (2020) A soft-chemistry approach to the synthesis of amorphous calcium ortho/pyrophosphate biomaterials of tunable composition. Acta Biomaterialia, 103. pp. 333-345. ISSN 1742-7061

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Abstract

The development of amorphous phosphate-based materials is of major interest in the field of biomaterials science, and especially for bone substitution applications. In this context, we herein report the synthesis of gel-derived hydrated amorphous calcium/sodium ortho/pyrophosphate materials at ambient temperature and in water. For the first time, such materials have been obtained in a large range of tunable orthophosphate/pyrophosphate molar ratios. Multi-scale characterization was carried out thanks to various techniques, including advanced multinuclear solid state NMR. It allowed the quantification of each ionic/molecular species leading to a general formula for these materials: [(Ca2+y Na+z H+3+x-2y-z)(PO43−)1-x(P2O74−)x](H2O)u. Beyond this formula, the analyses suggest that these amorphous solids are formed by the aggregation of colloids and that surface water and sodium could play a role in the cohesion of the whole material. Although the full comprehension of mechanisms of formation and structure is still to be investigated in detail, the straightforward synthesis of these new amorphous materials opens up many perspectives in the field of materials for bone substitution and regeneration.

Item Type:
Journal Article
Journal or Publication Title:
Acta Biomaterialia
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1300/1305
Subjects:
ID Code:
140684
Deposited By:
Deposited On:
23 Jan 2020 14:20
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Sep 2020 06:07