Study on the stability of antibacterial silver-carried zirconiumphosphate

Author(s): Yu-shan Xie, Shao-Zao Tan, Ze-peng Jiao, Qiu-hui Yang, Ren-fu Liu

The stability of antibacterial silver-carried zirconium phosphate (AgZrP) was investigated using thermoanalysis (TG/DSC), X-ray diffraction (XRD), UV light irradiation and water soaking methods. The weight loss ofAgZrP was nomore than 5.0mass%at the heat treating temperature of 1100oC, and the onset temperature of decomposition for the crystal structure of AgZrP appeared 1096.9oC. Thewhiteness of the sample treated at 900oC(4# sample) was 86.4%after exposed to UV light for 24h, and itsMIC against E.coli and S.aureus was 100 mg.l-1 and 150 mg.l-1 respectively.Moreover, the percentage of release Ag+ in 4# sample was only 6.1 mass% and the MIC against E.coli and S.aureus still remained 220mg.l-1 and 280mg.l-1 respectively after soaking in water for 10 days. Therefore,AgZrP possessed excellent thermal stability, light permanency and water resistance.

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