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Etude de procédés d'extraction de la matrice organique dans l'exosquelette du corail Porites Lutea : propriet́és physico-chimiques et biocompatibilité

Abstract : The use of coral as a bone substitute started more than 25 years ago. However, following the discovery of significant septic problems, the use of coral progressively declined while the use phosphocalcic substitutes climbed ever since. In this study we focused on the use of coral Porites Lutea and the various treatments used to remove proteins with their impacts on the coral crystal structure and mechanical properties. Local (micro waves) and global heat treatments, the use of hydrogen peroxide under various pressures, and the use of ethanol under both sub and supercritical conditions were evaluated. The global heat treatment and the supercritical use of ethanol appeared to result in adequate protein extraction. However, the heat treatment induced the transformation of the crystal phase from aragonite to calcite, resulting in a significant decrease of the coral mechanical resistance. Interestingly, the supercritical technology, using ethanol, resulted in the complete removal of the protein matrix without changing the coral crystal phase.
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https://tel.archives-ouvertes.fr/tel-01480551
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Submitted on : Wednesday, March 1, 2017 - 2:49:01 PM
Last modification on : Tuesday, December 7, 2021 - 1:16:05 PM
Long-term archiving on: : Tuesday, May 30, 2017 - 5:24:26 PM

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Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License

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  • HAL Id : tel-01480551, version 1

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Citation

Vincent Souillac. Etude de procédés d'extraction de la matrice organique dans l'exosquelette du corail Porites Lutea : propriet́és physico-chimiques et biocompatibilité. Matériaux. Université de Bordeaux 2, 2003. Français. ⟨NNT : 2003BOR21088⟩. ⟨tel-01480551⟩

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