https://orcid.org/0000-0003-2813-1494
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ABSTRACT
In this work, the fabrication of composite coatings based on block copolymers and silicates deposited on stainless-steel plates through electrophoretic deposition technique was studied. Linear poly(ɛ-caprolactone), and poly(dimethylsiloxane-block-ε-caprolactone) copolymers were obtained through ROP polymerization, whereas branched poly(hydroxyethyl methacrylate-co-(hydroxyethylmethacrylate-graft-ε-caprolactone)-block-ε-caprolactone) copolymers were synthesized by a one-pot technique by combining ROP and RAFT synthesis. SEM micrographs revealed homogenous and dense structures over the metallic substrate and the absence of micro-cracks. Thermal characterization revealed residual percentages of solids between 63% and 72% wt/wt. Finally, an in-vitro assessment confirmed the presence of a hydroxyapatite layer over coatings after immersion in a simulated body-fluid solution by XRD analyses.
Graphical abstract
Acknowledgments
Authors wish to thank the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, Argentina), the Universidad Nacional del Sur (UNS, Argentina), the Fondo para la Investigación Científica y Tecnológica (FONCyT, Argentina) under [Grant PICT-2016-0181] and the Universidad Nacional de Cuyo (UNCuyo, Argentina) under [Grant SECTYP/L018], for the financial support given to perform this research.
Conflicts of interest
No potential conflict of interest to declare.
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Notes on contributors
Franco Leonardo Redondo
Dr. Franco Leonardo Redondo is Chemical Engineer with Petrochemical and Environment orientations (2012) from Universidad Nacional de Cuyo (UNCuyo) and he got his PhD in Chemical Engineering (2018) from Universidad Nacional del Sur (UNS), Argentina. Nowadays, he is a posdoctoral student from the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). His research mainly focuses on the synthesis and chemical characterization of biocompatible copolymers, used for 3D printing. He is author of six international scientific papers and has around thirty presentations in national and international congress.
Gisela Alejandra Ramona Quiroga
Ing. Gisela Alejandra Ramona Quiroga is a Chemical Engineer with Petrochemical orientation (2012) from Facultad de Ciencias Aplicadas a la Industria (FCAI) of Universidad Nacional de Cuyo (UNCuyo), Argentina. Nowadays, she is auxiliary staff at the Universidad Tecnológica Nacional (UTN) and the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), and Teaching Assistant of the Universidad Nacional de Cuyo, cathedra: Physical-chemistry. Her research is mainly focuses on the development of bioactive coatings by electrophoretic deposition.
Augusto Gonzaga Oliveira de Freitas
Dr. Augusto Gonzaga Oliveira de Freitas is graduated in Chemistry - Degree from the Regional Integrated University of Alto Uruguai e das Missões (2009), Master in Chemistry from the Federal University of Santa Maria (2012), PhD in Chemistry from the Federal University of Santa Maria (2016). He has experiences on synthesis and structural characterization of coordination compounds; and polymeric materials, with emphasis on the synthesis and characterization of block copolymers by controlled polymerization techniques; preparation of self-assembled materials based on amphiphilic block copolymers; and the physicochemical analysis of polymeric materials in solid and in solution. He is currently an Adjunct Professor at Unipampa, campus Itaqui.
Marcelo Armando Villar
Dr. Marcelo Armando Villar got the degree of Chemical Engineer (1986) from Universidad Nacional de La Plata (UNLP) and the PhD in Chemical Engineering (1991) from Universidad Nacional del Sur (UNS), Argentina. He did a postdoctoral stay at the Department of Materials Science, Massachusetts Institute of Technology, USA, from 1992 to 1994. Nowadays, he is a Senior Researcher at the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Full Professor at the Chemical Engineering Department of UNS. His main research lines are related to polymer science and technology. He was advisor of eight doctoral theses, author of more than one hundred papers in international journals, one book and six book's chapters.
Mario Daniel Ninago
Dr. Mario Daniel Ninago got the degree of Chemical Engineer with Petrochemical orientation (2007) from Universidad Nacional de Cuyo (UNCuyo) and the PhD in Chemical Engineering (2012) from Universidad Nacional del Sur (UNS), Argentina. Nowadays, his research is being carried out in the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). His research mainly focuses on the synthesis and thermal characterization of linear and branched block copolymers, as well as polymer composites reinforced with mineral clays. He is author of twenty-nine international scientific papers, four book's chapters and he has around one hundred and thirty presentations in national and international congress.
Andrés Eduardo Ciolino
Dr. Andrés Eduardo Ciolino got the degrees of Bachellor in Chemistry (1998), Professor in Chemistry (2001), Master in Chemistry (2001) and the PhD in Chemistry (2006) from Universidad Nacional del Sur (UNS), Argentina. Nowadays, he is an Independent Researcher at the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Adjunct Professor in UNS. He has performed training studies in Greece (Prof. Nikos Hadjichristidis), France (Prof. Ives Gnanou), and Belgium (Prof. Filip Du Prez). His research mainly focuses on the synthesis and characterization of well-defined complex macromolecular structures. He is author of more than fifty international scientific papers, three book's chapters and he has around over two hundred presentations in national and international polymer congress and symposiums.