Electrochemically Assisted Co-Precipitation of Electrically Conducting Polymer with Calcium Phosphate Coatings on Ti Alloys
Electrically conducting polymer containing calcium phosphate coating (ppy/brushite) was made on the Ti-6Al-4V surface by means of electrochemically assisted co-precipitation. This study examined the effects of the electrically conducting polymer on electrochemically assisted co-precipitation of ppy/ brushite onto titanium alloys. Electrochemically assisted co-precipitation of ppy/ brushite coatings resulted in an increase in the thickness and adhesion of coatings compared to those of coatings of single calcium phosphate at the same deposition conditions. The surface morphology of coatings characterized by SEM showed that the morphology of ppy/ brushite was superior to that of brushite. XRD indicated that ppy did not change the phase of brushite. Thus, this electrochemically assisted co-precipitation technique provides an effective method of polypyrrole incorporation at physiological temperature, which can offer excellent thickness, adhesion and structure of coatings, with a potential for sustained release of therapeutic agents as required for metallic implant fixation.
Wei Pan and Jianghong Gong
C. Ma et al., "Electrochemically Assisted Co-Precipitation of Electrically Conducting Polymer with Calcium Phosphate Coatings on Ti Alloys", Key Engineering Materials, Vols. 336-338, pp. 1632-1634, 2007