Chemical Research in Chinese Universities ›› 2010, Vol. 26 ›› Issue (4): 509-513.

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Structure and Antibacterial Activity of Modified Montmorillonite

XIE Yu-shan, TAN Shao-zao*, LIAO Ma-hua and LIU Ren-fu   

  1. Department of Chemistry, Jinan University, Guangzhou 510632, P. R. China
  • Received:2009-07-15 Revised:2009-10-17 Online:2010-07-25 Published:2010-10-01
  • Contact: TAN Shao-zao
  • Supported by:

    Supported by the National Natural Science Fundation of China(Nos. 20676049, 20871058 and 20971028 ), the Foundation of Enterprise-University-Research Institute Cooperation from Guangdong Province and Ministry of Education of China(Nos.  2007B090400105 and 2008A010500005).

Abstract: Tetradecyldimethylbenzyl ammonium salt(TDMBA) cations were intercalated into sodium montmorillonite(Na-MMT) by an ion exchange reaction. The resulting TDMBA-MMT was characterized by Fourier-transform infrared spectroscopy(FTIR), thermogravimetric analysis(TGA), and X-ray diffraction(XRD). Moreover, the antibacterial activity and water-resistance of TDMBA-MMT were investigated. The results show that TDMBA cations are intercalated into the Na-MMT. The onset temperature of decomposition of TDMBA cations in TDMBA-MMT is raised about 60 °C higher than that of tetradecyldimethylbenzyl ammonium chloride(TDMBACl), and the d(001) spacing enlarged from 1.23 nm to 2.10 nm. 0.1 mg/mL TDMBA-MMT is fully enough to kill all the Staphylococci aureus(S. aureus) and more than 99.99% of the Escherichia coli(E. coli) in a sample solution within 6.0 h touch, and the TDMBA-MMT also shows long acting properties.

Key words: Na-MMT, TDMBA cation, Surface modification, Structure, Antibacterial activity