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J. Korean Ceram. Soc. > Volume 33(2); 1996 > Article
Journal of the Korean Ceramic Society 1996;33(2): 242.
$Na^+$$longleftrightarrow$$Ag^+$ 이온교환에 따른 Na_2O-Al_2O_3-SiO_2$ 계 유리의 특성 및 살균효과
이광희, 최세영
연세대학교 세라믹공학과
Characterization and Bacteicidal Effect of Na_2O-Al_2O_3-SiO_2$ Glass System by $Na^+$$longleftrightarrow$$Ag^+$ Ion Exchange
ABSTRACT
Glasses of Na2O-Al2O3-SiO2 system were prepared and ion-exchange characteristics change of properties and bactericidal effects by Na+↔Ag+ ion exchange were studied. Parent glasses with three compositions of varying Na2O in the 20~30 wt% were ion-exchanged in the molten salt of 2 mol% AgNO3+98 mol% NaNO3 at 320~36$0^{circ}C$ for 15~16min. Amount of ion exchange and penetration depth of Ag+ ion increased with Na2O content in the parent glass ion exchange temperature and time. After ion exchange densities and Vickers hardness of the glasses increased and the glasses showed yellow-brown color and as amount of ion exchange increased the color turned deep because partial reduction and agglomeration of Ag+ into Ag0 results in absorption of visible light. After ion exchange chemical durability of the glass to wter was enhanced compara-bly that weight loss and change of surface of the glass were not found for the leaching test in 5$0^{circ}C$ K.I water for 240hrs. Bactericidal effect of ion exchanged glass on Staphylococcus aureus and E. coli was determined by microorganism test and bactericidal effect increased with amount of ion exchange and incubation time.
Key words: $Na^+$$\longleftrightarrow$$Ag^+$ ion-exchange, $Ag^+$ ion, Chemical durability, Bactericidal effect
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