Itaconic Acid Based Surfactants: I. Synthesis and Characterization of Sodium n-Octyl Sulfoitaconate Diester Anionic Surfactant

Jun Xu; Fengzhi Cao; Tong Li; Shuai Zhang; Chuanhui Gao; Yumin Wu

doi:10.1007/s11743-015-1769-4

Itaconic Acid Based Surfactants: I. Synthesis and Characterization of Sodium n-Octyl Sulfoitaconate Diester Anionic Surfactant

J Surfactants Deterg. 2016:19:373-379. doi: 10.1007/s11743-015-1769-4. Epub 2016 Feb 1.

Authors

Jun Xu¹, Fengzhi Cao¹, Tong Li¹, Shuai Zhang¹, Chuanhui Gao¹, Yumin Wu¹

Affiliation

¹ Chemical Engineering College, Qingdao University of Science and Technology, Qingdao, 266042 People's Republic of China.

Abstract

A novel itaconate-based surfactant, namely sodium n-octyl sulfoitaconate diester (SOSID), has been synthesized from itaconic acid (IA) and n-octanol by sulfonation and esterification reaction processes. The effects of reaction temperature, reaction time, molar ratios of n-octanol to IA and the catalyst dosage on the esterification were investigated. The chemical structure of the surfactants SOSID was characterized by means of LC-MS and confirmed by FT-IR and ¹H NMR spectroscopy. The surface tension γ and the critical micelle concentration (CMC) were determined as 25.02 mN/m and 4.0 × 10^-4 mol/L by using surface tensiometer at 20 °C. Further investigations showed that SOSID possess excellent wetting, emulsifying and lime soap dispersing properties.

Keywords: Anionic surfactant; Esterification; Sodium n-octyl sulfoitaconate diester; Sulfonation.