Preparation and Properties of High Strength Ag-carrying Antibacterial Glass by Ion Exchange Method
WANG Haifeng1,2, XU Guixiang1, DONG Yungu1, XIONG Neng1, WANG Ruoxuan1
1 School of Material Science and Engineering, Donghua University, Shanghai 201620, China 2 Advanced Glass Manufacturing Technology Engineering Research Center, Ministry of Education, Shanghai 201620, China
Abstract: The Na2O-Al2O3-SiO2 system glass was ion exchange strengthened by KNO3/NaNO3 mixed molten salts, and then the tempered glasses were put into AgNO3/KNO3 mixed molten salt with different proportions to prepare high-strength Ag-carrying antibacterial glass. The bending strength of glass samples were measured by universal testing machine, the element distribution on the glass surface was measured by EDS and the antimicrobial activity of glass was determined by viable counting method. The results show that the glass with high strength, high transmittance and good antibacterial ability can be produced by two-step ion exchange process. Moreover, ion exchanging for 2 h with mass ratio of mixed salt m(KNO3)∶m(NaNO3)=9∶1 in the first step and 10 minutes with mass ratio of mixed salt m(AgNO3)∶m(KNO3)=1∶9 in the second step making the antibacterial glass obtain optimized comprehensive properties.
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