Sol‐gel preparation and properties of Ag‐containing bioactive glass films on titanium. Issue 6 (22nd May 2017)

• Record Type: Journal Article
• Authors: Fu, Tao; Alajmi, Zafer; Shen, Yaogen; Wang, Lijun; Yang, Shuiyun; Zhang, Man
• Is Part Of: International journal of applied ceramic technology. Volume 14:Issue 6(2017)
• Page Start: 1117
• Page End: 1124
• Publication Date: 2017-05-22
• Subjects: Ag -- antibacterial -- bioactive glass -- corrosion -- film -- sol‐gel; Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.12713
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract: Ag‐containing bioactive glass films (Ag/Ca atomic ratios of 0, 5% and 10%) were sol‐gel prepared for bioactive and antibacterial modification of titanium. The gel powders calcined at 610°C are mainly amorphous confirmed by x‐ray diffraction, but small diffraction peaks of Ca3 SiO5 and silver are detected. The film surface is porous with the pore size of ~200 nm. Silver‐rich sub‐micro particles with sizes of 100‐480 nm are present at the surface of Ag‐glass films. CaP phase, metallic silver and silica are detected by x‐ray photoelectron spectroscopy. The mean apparent bonding strength of the films is as high as 21±1 MPa measured by the pull‐off test. The potentiodynamic polarization test shows that the coated samples have better corrosion resistance than the polished sample. The Ag‐glass coatings and their wafer samples exhibit antibacterial activity against S. aureus . The coated samples are covered by apatite layer after soaked in the simulated body fluid for 2 weeks, demonstrating their bioactivity.