Surface Activities, Antibacterial Activity and Corrosion Inhibition Properties of Gemini Quaternary Ammonium Surfactants with Amido Group and Carboxylic Counterions.

A series of gemini quaternary ammonium surfactants containing carboxylate counterion with the formula CHCONH(CH)N(CH)(CH)N(CH)(CH) NHCO CH·2Y (Y=HCOO, CHCOO, CHCHOHCOO) have been synthesized by a counterion conversion process and characterized by Fourier transform infrared spectroscopy and mass spectroscopy. It is found that these surfactants reduce the surface tension of water to a minimum value of 26.78 mN·m at a concentration of 1.21 ×10 mol·L. TEM images reveal that aggregates with vesicles or tubular structure are spontaneously formed in these surfactants aqueous solution with the concentration of 1×10 mol·L. It is also found that they are effective corrosion inhibitors for A3 steel in acid solution and have superior antibacterial activity at a concentration of 0.1g·L.