ISSN:
1662-8985
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
In this work, triethyl phosphate (TEP) was used to bioactivating titanium. Titanium platesgrafted with TEP were immersed in a two times concentrated simulated body fluid (2SBF) toinvestigate deposition of hydoxyapatite (HA) on the surface. A phosphate buffer solution (PBS) withbovine serum albumin (BSA) was used to evaluate adsorption of protein on the grafted titaniumsurface. The morphology, component and structure of samples were examined by scanning electronicmicroscopy, attenuated total reflection Fourier transform infrared spectroscopy and X-ray diffractionrespectively. The concentration change of BSA in adsorption test was examined with theultraviolet-visible absorption spectra (UV). The analyses showed that TEP grafted onto the titaniumsurface. In 2SBF, calcium and phosphate ions deposited spontaneously onto the grafted titaniumsurface and formed a HA coating with a network-like microporous structure after being immersed for3 days. The coating consisted of HA particles with 180-265nm in thickness and 72-85nm in width.The diameter of the micropores was about 200nm. The HA coating appeared better uniformity thanthat on the modified titanium using phosphoric acid. BSA rapidly adsorbed onto the grafted titaniumsurface at first half an hour and then the adsorption quantity almost kept constant. These resultsindicate that TEP grafting is an effective approach to modify bioactivity of titanium
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.797.pdf
