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Synthesis and coating of apatite by sol gel method in Ti c.p surfaces

Grant number: 12/05564-7
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): June 01, 2012
Effective date (End): May 31, 2013
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal researcher:Antonio Carlos Guastaldi
Grantee:Anderson de Rienzo Noronha
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil


ABSTRACTIn this research project proposes to study the physicochemical interactions involving chemical modification of surfaces of commercially pure titanium (Ti c.p.) and subsequent coating with calcium phosphate bioceramics in order to improve the adhesion between the surface modifier coating and the metal, promoting osseointegration. The surface modification consists in the formation of titanium oxide from the chemical treatment of the surface with NaOH, and subsequent coating with biological interest apatites prepared by sol-gel process and deposited by immersion procedure(dip-coating). The characterization of the metal platform before and after chemical modification with apatite coatings and his interfaces will be performed by the techniques of thermal analysis (TG), scanning electron microscopy (SEM) coupled to high-resolution semi-quantitative elemental analysis by energy dispersive spectroscopy, X-ray diffraction (DRX) and spectroscopy in the mid-infrared (FTIR). Therefore, intended to optimize the parameters of the calcium phosphate powders and coatings in order to modify the bioinert surface of titanium to a bioactive constituted by biological interest calcium phosphate bioceramics to be used in orthopedic and dental implants and systems controlled release drugs.