Navegando por Autor "Ramos, Sérgio Luís Lima de Moraes"

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    Soapstone reinforced hydroxyapatite coatings for biomedical applications.
    (2020) Mota, Laureana Moreira; Nicomedes, Daniel Nilson; Barboza, Ana Paula Moreira; Ramos, Sérgio Luís Lima de Moraes; Vasconcelos, Rebecca Schirmer de Souza; Medrado, Nathanael Vieira; Alvarenga, Érika Lorena Fonseca Costa de; Machado, Giovanna; Juste, Karyne Ramos de Campos; Vasconcelos, Cláudia Karina Barbosa de; Righi, Ariete; Manhabosco, Sara Matte; Resende, Rodrigo Ribeiro; Batista, Ronaldo Junio Campos; Soares, Jaqueline dos Santos; Manhabosco, Taíse Matte
    Mechanical resistant bioactive materials are of high interest for biomedical applications. In this work, we address the improvement in mechanical properties of HA coatings by the addition of a cheap and widely available secondary phase material, the talc from soapstone. The composites hydroxyapatite/talc (HA/talc) were successfully obtained by pulsed electrodeposition and characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, Raman spectroscopy, corrosion and wear resistance and biocompatibility tests. We found that the addition of talc greatly improves the mechanical properties of coatings (i. e., wear track and friction coefficient in wear tests were significantly diminished) without diminishing corrosion resistance and biocompatibility. Alamar Blue® tests, alkaline phosphatase activity, and collagen production indicate that the biocomposites are biocompatible and talc itself induce bone maturation.