Preparation And Characterization Of Advanced Antibacterial Base On Zirconium Phosphate With High-content Sodium

At present, prevailing Ag-loaded antibacterial agents have shortcomings such as high price, the changeful color and low fungicidal activity. Therefore, developing non-silver antibacterial becomes hot. In this paper, high sodium content zirconium phosphates (ZrP) were intercalated by antibacterial ion (copper ion, cerium ion, quaternary ammonium salt) to get a series of advanced non-silver antibacterial through an ion-exchange method. The structure and characteristic of the resulting non-silver antibacterial were characterized by EDX,XRD,SEM and TEM. Specific surface, water resisting property, thermal stability and antibacterial activity were also studied.First, ZrP was prepared through hydrothermal method. Result shows that it was hexagonal lattice system and its particles were not evenly distributed, including lump bigger than 500 nm and granulum smaller than 200 nm.Secondly, copper-loaded zirconium phosphate antibacterials (Cu/ZrPs) were prepared by intercalating Cu2+ into ZrP through an ion-exchange method. Result shows that the copper contents of Cu/ZrPs can reach 10.0 mass%.. With the content of Cu2+ increasing, the crystalline structure of Cu/ZrPs remains the same, but the crystallinity of Cu/ZrPs reduces. The particle size distribution of Cu/ZrPs is uneven, with lump bigger than 500nm and baculiform granulum smaller than 100nm. Cu/ZrPs showed excellent water resisting property and outstanding antibacterial activity against E. coli and S. aureus.Thirdly, copper and cerium-loaded zirconium phosphate composite antibacterials (Cu-Ce/ZrPs) were prepared by intercalating Cu2+ and Ce3+ into ZrP through an ion-exchange method. Result shows, when the content of Ce3+ increased, its crystallinity reduced and specific surface enlargemented. Cu-Ce/ZrPs showed coordinate antibacterial activity and excellent antibacterial activity with 45 mg-L"1 and 60 mg-L"1 MIC against E. coli and S. aureus, respectively; 100 mg-L"1 and 125 mg-L-1 MBC against E. coli and S. aureus, respectively.Finally, quaternized zirconium phosphate antibacterials (QZrPs) were prepared by intercalating quaternary ammonium salt into ZrP through an ion-exchange method. Result shows that the content of quaternary ammonium salt in QZrPs increased with the increasing of quaternary ammonium salt concentration in reaction solution. QZrPs are amorphous. IR spectra of QZrPs showed characteristic absorption peak indicated that the quaternary ammonium salt was already intercalated into ZrP. The quaternary ammonium cations in QZrPs exhibited excellent thermal stability with the onset decomposition temperatures all higher than 345℃. The antibacterial activity of QZrPs was enforced with the increasing of quaternary ammonium salt content. QZrP-3 with 6.96 mass% of quaternary ammonium cations displayed excellent antibacterial activity with 800 mg-L"1 and 100 mg-L-1 MIC against E. coli and S. aureus, respectively; 1000 mg-L-1 and 150 mg·L-1 MBC against E. coli and S. aureus, respectively.