Influence of sulfonic acid group on the performance of castor oil acid based methyl ester ethoxylate sulfonate

ABSTRACT

Castor oil acid methyl ester ethoxylate sulfonate (CAMEES) is a new multifunctional anionic-nonionic surfactant with three hydrophilic groups. In this work, CAMEES was synthesized through reaction of castor oil acid methyl ester ethoxylate (CAMEE) with sodium bisulfite in the presence of tert-butyl peroxybenzoate as catalyst and ferric chloride as co-catalyst in solution of water and isopropanol. The sulfonic acid group has an important effect on the physicochemical properties of the surfactant. Compared to CAMEE, CAMEES exhibits better soybean oil emulsification, detergency, foam ability and stability. However, owing to the sulfonic acid group, the wetting ability and paraffin emulsification are more limited.

GRAPHICAL ABSTRACT

KEYWORDS:

• Castor oil acid methyl ester ethoxylate
• castor oil acid methyl ester ethoxylate sulfonate
• sulfonic acid group
• surfactant properties

Additional information

Funding

This work was supported by the National Key R&D Program of China under grant (number 2017YFB0308800); and Key R & D Program in Shanxi Province under grant (number 201603D421036).

Notes on contributors

Jingjie Zhou

Jingjie Zhou is an engineer at the China Research Institute of Daily Chemical Industry and she got her Master’s degree in the Tianjin University.

Yongqiang Sun

Yongqiang Sun is a professor at the China Research Institute of Daily Chemical Industry whose research interests are focused on engineering developments related to the manufacturing of nonionic surfactants.

Kehua Zhu

Kehua Zhu is a postgraduate at the China Daily Chemical Industry Research Institute. His main research field is the synthesis and properties of castor oil acid methyl ester ethoxylate.

Martino Di Serio

Martino Di Serio is a professor of Industrial Chemistry at the Department of Chemical Sciences of the University of Naples FedericoⅡ. His research interests are focused on the ethoxylation of fatty acid esters.

Yong Zhang

Yong Zhang is an engineer at the China Research Institute of Daily Chemical Industry. His research interests are focused on the synthesis and investigation of nonionic surfactants.

Jinyuan Sun

Jinyuan Sun is an engineer at the China Research Institute of Daily Chemical Industry. His research interests are focused on the properties of series of surfactants.

Huaping Wu

Huaping Wu is an engineer at the China Research Institute of Daily Chemical Industry. Her main research field is the analysis and determinations of surfactants.

Lirong Ding

Lirong Ding is a postgraduate student at the China Research Institute of Daily Chemical Industry, Taiyuan, Shanxi Province, P.R. China. Her main research field is the structure – property relationship in molecules with two active groups.

Huibin Liang

Huibin Liang is an engineer at the China Research Institute of Daily Chemical Industry. His research interests are focused on the esterification of fatty acid.