Abstract

Calcium hydroxyapatite (CaHAp) was prepared in the presence of two alkylphosphonates, the tert-butyl phosphonic acid TBPOH and the 2-carboxyletylphosphonic acid 2-CEPA, by hydrothermal method at 120 degrees C for 15 h. The modification of hydroxyapatite by grafting organic moieties is confirmed by IR and NMR MAS ((1)H and (31)P) spectroscopy and chemical analysis. X-ray powder diffraction patterns show that the incorporation of organic moieties induces a significant loss of the material crystallinity and a clear increase of the unit cell lattice parameter a as function of 2-CEPA grafting rate. The specific surface area (SSA) increases with increasing phosphonate amount especially for 2-CEPA. All techniques show the lower reactivity of TBPOH due to the steric effects of tert-butyl, whereas the 2-CEPA with a linear chain and double acidic functions is more reactive and can replace the OH(-) groups of the apatitic structure.

Autore Pugliese

• Maggi Sabino

Tutti gli autori

• H. Agougui ; A. Aissa ; S. Maggi ; M. Debbabi

Titolo volume/Rivista

Applied surface science

Anno di pubblicazione

2010

ISSN

0169-4332

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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