ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
In the last years, the porosity in ceramic materials for implants production hasmotivated the development of various technologies. Calcium phosphate ceramics, in specialthe tricalcium phosphate - TCP, are very promising as bone substitutes and scaffolds fortissue engineering. The macroporosity incorporation in TCP ceramics by porogenic, foamingand consolidator agent, as globular protein (ovalbumin) was the focus of this work.Preliminary studies of zeta potential were made to have a suitable suspension. Ovalbuminamounts (5-7 wt%) were added to the ceramic slurries and suspensions with a solidpercentage higher than 60 wt% were obtained. The interaction albumin/surfactant withdetergency properties was evaluated by pH and viscosity measurements. The foam wasproduced by mechanical stirring. The results suggested that the presence of the surfactantincrease the volume and stability of foam. After drying, burnout and sintering (1200oC/30min.) the phase composition of the foams was determined by X-ray diffraction. Themicrostructure and porosity were evaluated by scanning electron microscopy. SEMmicrographs of the foam show that the structure consists of a permeable porous network,being observed spherical and interconnected pores
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.530-531.587.pdf
