Soapstone reinforced hydroxyapatite coatings for biomedical applications


Laureana Moreira Mota, Daniel Nilson Nunes Nicomedes, Ana Paula Moreira Barboza, Sérgio Luís Lima [de Moraes Ramos], Rebecca Vasconcellos, Nathanael Vieira Medrado, Érika Costa [de Alvarenga], Giovanna Machado, Karyne R.C. Juste, Cláudia Karina [de Vasconcelos], Ariete Righi, Sara Matte Manhabosco, Rodrigo Ribeiro Resende, Ronaldo Junio Campos Batista, Jaqueline [dos Santos Soares], and Taíse Matte Manhabosco. 2020. “Soapstone reinforced hydroxyapatite coatings for biomedical applications.” Surface and Coatings Technology, Pp. 126005.


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.