Zhen-long Zhao, Xiangfeng Guo, Lihua Jia
Oct 31, 2014
Citations
0
Influential Citations
17
Citations
Journal
RSC Advances
Abstract
A series of novel methoxybenzyl-containing quaternary ammonium surfactants, namely N,N-dimethyl-N-alkyl-N-(m-methoxybenzyl) ammonium chloride (m-MDRA-n), were synthesized from m-methoxybenzyl chloride and N,N-dimethyl-N-alkyl tertiary amine. The structure of those products was characterized by FT IR, 1H NMR, 13C NMR and MS. Their surface activity, absorption and aggregation behavior in aqueous solution at different temperature were studied by surface tension and conductivity method. The results showed that the critical micelle concentration (CMC) of m-MDRA-n was much lower than traditional surfactants of N,N-dimethyl-N-alky-N-benzyl ammonium chloride (BAC), which indicated that m-MDRA-n containing methoxybenzyl exhibited a higher surface activity and was easier to aggregate in aqueous solution. The standard free energy (ΔGmic) and standard enthalpy (ΔHmic) and standard entropy (ΔSmic) were studied by isothermal titration calorimetry (ITC). In addition, m-MDRA-n exhibited a high bactericidal activity.