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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 6
BKCSDE 32(6)
June 20, 2011 

Microstructure and Antibacterial Activity of Phosphonium Montmorillonites
Agui Xie, Wenyan Yan, Xianshen Zeng, Guangjian Dai, Shaozao Tan, * Xiang Cai, Ting Wu
Composite materials, Phosphonium montmorillonite, Dodecyl tributyl phosphonium ion, Microstructure, Antibacterial activity
Phosphonium montmorillonites (P-MMTs) were prepared by intercalating dodecyl tributyl phosphonium salt into sodium montmorillonite (Na-MMT) through an ion-exchange method. Microstructure and antibacterial activity of phosphonium montmorillonites were studied by FT-IR, TGA, XRD and Minimum Inhibitory Concentration (MIC), respectively. The results show that phosphonium montmorillonites exhibit higher thermal stability than conventional ammonium montmorillonites, the onset temperature of decomposition is higher than 300 oC, and the basal spacing of phosphonium montmorillonites is enlarged compared to that of sodium montmorillonite. Phosphonium montmorillonites also show good antibacterial activity with the MIC against E. coli and S. aureus of 150 and 50 mg·L−1, respectively.
1936 - 1938
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