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

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

Abstract

In 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 of 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 its interfaces will be performed by the techniques of thermal analysis (TG), scanning electron microscopy (SEM) coupled to a 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 in calcium phosphate bioceramics to be used in orthopedic and dental implants and systems controlled-release drugs.(AU)