MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Preparation of Antibacterial ZnO-CaO-P2O5-Nb2O5 Invert Glasses
Sungho LeeHirotaka UeharaAnthony L. B. MaçonHirotaka MaedaAkiko ObataKyosuke UedaTakayuki NarushimaToshihiro Kasuga
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2016 Volume 57 Issue 12 Pages 2072-2076

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Abstract

ZnO-CaO-P2O5-Nb2O5 invert glasses, with ZnO substituted for CaO, were successfully prepared using a melt-quenching method. Their structures, dissolution behaviors, and antibacterial abilities were evaluated. Niobate switched its role of network former to modifier with increasing ZnO content, as Zn2+ ions preferentially coordinated with phosphate groups. In parallel, with increasing content of ZnO in the glasses, P-O-Zn bonds were formed, which crosslinked phosphate groups with ZnO acting as a network former. As a result, the glass-forming ability and chemical durability of the glasses were improved. The glasses showed antibacterial ability to gram-positive and -negative bacteria.

Fig. 5 Number of E. coli (left) and S. aureus (right) after cultivation with the glass powders for 24 h. “0 h control” means the seeded number of E. coli and S. aureus, and the error bar means standard deviation. Fullsize Image
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© 2016 The Japan Institute of Metals and Materials
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