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 spec...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 ℃ 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.展开更多
基金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)
文摘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 ℃ 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.
