Asymmetric sodium benzenesulfonate Gemini surfactant: Synthesis, properties and application

Article abstract of DOI:10.1016/j.molliq.2019.04.109

An asymmetric sodium benzenesulfonate Gemini surfactant (ASBGS) designed and prepared by esterification and sulfonation reaction using 4- (dodecyl amide) phenol (4-DAP), dodecanol maleic acid monoester (DMM) and NaHSO₃. The structure of the ASBGS characterized by FT-IR and ¹H NMR. The surface tension, emulsifying force and aggregation property of the ASBGS tested. The results showed that the critical micelle concentration and γ_CMC of ASBGS were 0.8 × 10^?4 mol/L and 25.1 mN/m, respectively. Thermodynamic parameters results showed that the micellization of this surfactant was a spontaneous process. DLS and TEM results showed that the concentration of 10 CMC surfactant solution aggregated into vesicles, and the average particle size was 85 nm. Then ASBGS was used to emulsify rapeseed oil for lubricating collagen fiber. The emulsification time for rapeseed oil was 283 s, showing that ASBGS has an excellent emulsifying ability. In addition, we prepared collagen fiber lubricating materials (CFLMs) by blending different dosages of the ASBGS with rapeseed oil collagen fiber lubricating material (ROCLM), its emulsifying ability increased from 47.37% to 87.37% in cold water.