Synthesis, Surface and Interfacial Properties of Dodecyl Diphenyl Oxide Disulfonate with Different Counterions

Abstract

AbstractDodecyl diphenyl oxide disulfonate with different counterions (C12MADS‐M, M = Na, Mg, Ca) were synthesized using dodecyl alcohol, diphenyl oxide and SO3 as reagents through alkylation–sulfonation–neutralization. The structure of the product was characterized by infrared spectroscopy and electrospray ionization‐mass spectrometry. The surface and interfacial prosperities were investigated. The critical micelle concentration (CMC) of C12MADS‐Na, C12MADS‐Mg and C12MADS‐Ca was 1.23 × 10−3, 5.25 × 10−4 and 5.37 × 10−4 mol/L, respectively. The surface tension at CMC (γCMC) of C12MADS‐Na, C12MADS‐Mg and C12MADS‐Ca was 43.2, 37.1 and 36.6 mN/m, respectively. Interfacial tensions between crude oil and C12MADS‐M aqueous solution gave only a small change in the calcium chloride concentrations ranging from 50 to 10,000 mg/L.