Synthesis and Properties of a New Piperazine-Based Bicaudate Gemini Surfactant

Abstract

A novel bicaudate gemini surfactant was synthesized with anhydrous piperazine, chloride- bian, and 1-bromo dodecane as raw materials. Its structure was verified by infrared and ¹H NMR. The surface active properties of the bicaudate gemini surfactant in water were measured at 55°C. Its critical micelle concentration (cmc) and γ cmc was 0.50 mmol · L⁻¹ and 28.95 mN · m⁻¹, respectively. Results indicate that there was not a remarkable difference in γ_cmc values between the synthesized bicaudate surfactant and conventional gemini surfactant N,N′–bis (dodecyl dimethyl ammonium bromide)-3-oxa-1,5-pentadiammonium. The sterilizing antimicrobial performance of the bicaudate gemini surfactant was examined. The bicaudate gemini surfactant show excellent inhibition against 18 types of bacteria compared with conventional monomeric surfactant and gemini surfactant at concentrations of 50 mg/L.

Keywords:

• Bactericidal activities
• bicaudate
• gemini surfactant
• piperazine
• surface tension

Acknowledgments

This work was financially supported by the Key Laboratory Project from the Ministry of Education of LiaoNing Province in China (20095059).

Notes

^a The indicated inhibition zone diameters are average for three replicates.