Hydroxyapatite with permanent electrical polarization: preparation, characterization, and response against inorganic adsorbates

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Document typeArticle
Defense date2018-04-16
Rights accessOpen Access
Abstract
Permanently polarized hydroxyapatite (HAp) particles have been prepared by applying a constant DC of 500 V at 1000¿°C for 1 h to the sintered mineral. This process causes important chemical changes, as the formation of OH- defects (vacancies), the disappearance of hydrogenophosphate ions at the mineral surface layer, and structural variations reflected by the increment of the crystallinity. As a consequence, the electrochemical properties and electrical conductivity of the polarized mineral increase noticeably compared with as-prepared and sintered samples. Moreover, these increments remain practically unaltered after several months. In addition, permanent polarization favours significantly the ability of HAp to adsorb inorganic bioadsorbates in comparison with as-prepared and sintered samples. The adsorbates cause a significant increment of the electrochemical stability and electrical conductivity with respect to bare polarized HAp, which may have many implications for biomedical applications of permanently polarized HAp.
CitationRivas, M., del Valle, LJ., Armelin, E., Bertran, O., Turon, P., Puiggali, J., Aleman, C. Hydroxyapatite with permanent electrical polarization: preparation, characterization, and response against inorganic adsorbates. "Chemphyschem", 16 Abril 2018, vol. 19, núm. 14, p. 1746-1755.
ISSN1439-4235
Collections
- Departament de Física - Articles de revista [1.258]
- IMEM-BRT- Innovation in Materials and Molecular Engineering - Biomaterials for Regenerative Therapies - Articles de revista [262]
- PSEP - Polimers Sintètics: Estructura i Propietats. Polimers Biodegradables. - Articles de revista [174]
- Departament d'Enginyeria Química - Articles de revista [1.595]
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