Development and properties of organically-modified mesoporous hydroxyapatites using organophosphonate

and carboxylate moieties

 

K. Achelhi1, S. Saoiabi1, L. El Hammari1, A. Laghzizil1*, K. Lahlil2

1Laboratoire de Chimie Physique Générale, Université Mohamed V, Faculté des Sciences BP.1014 Rabat, Morocco

2Laboratoire de Physqiue  de la Matière Condensée, Ecole polytechnqiue, Palaiseau, France.

* Corresponding author. E-mail: laghzizi@fsr.ac.ma

Received: 03 July 2011; revised version accepted: 30 September 2011

 

Abstract

Elaboration of porous hydroxyapatite Ca10(PO4)6(OH)2 was highly desirable to design biomaterials, adsorbents or catalysts. Partial substitution of PO43- inorganic phosphates by organo-phosphonates led to nanostructured apatite materials with high specific surface area (> 260 m2g-1). Several chelating carboxylates were used to control the reactivity of the calcium ions.. These approaches not only allowed the homogeneous grafting of the organic function over the whole material volume, but they can also significantly modify the crystallinity, particle size and porous structure of the resulting hydroxyapatite. As a result, we have synthesized a large variety of modified apatite materials with different structures and chemical compositions that were evaluated in remediation processes.

 

Keywords: Organoapatite; Phosphonates; Carboxylates ; Surface modification.

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