PREPARATION OF ENVIRONMENTAL FRIENDLY BENZENE-FREE METAL SULFONATE SURFACTANT FOR LUBRICANT ADDITIVE FORMULATION

Abstract

In this study, environmental friendly benzene-free metal sulfonate surfactants were synthesized for lubricant formulation and the structure of intermediates and final products were elucidated by H-1 NMR, C-13-NMR and FT-IR. Also, the interfacial properties including critical micelle concentration (CMC), surface tension, contact angle, interfacial tension, foam stability and emulsion stability were measured. The biodegradability and long-term stability of the resulting products were characterized and the performances of prepared lubricants were measured such as oil stain protection, rust inhibition and lubrication and compared with that of lubricant based on LAS (linear alkyl benzene sulfonate).