1. Synthesis and properties of sodium isotridecyl polyoxyethylene ether sulfate with different ethylene oxide addition numbers.
- Author
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Li, Penghui, Cao, Shengti, Huo, Yueqing, and Liu, Xiaochen
- Subjects
POLYETHYLENE glycol ,SURFACE tension ,CONTACT angle ,INTERFACIAL tension ,SODIUM ,ETHYLENE oxide - Abstract
Sodium isotridecyl polyoxyethylene ether sulfate (iC
13 EOn S, n = 5, 7, and 9) with different ethylene oxide (EO) numbers were synthesized by SO>3 membrane sulfation process for the first time. The effects of EO number on the equilibrium surface tension, dynamic surface tension, contact angle, and alkali/salt resistance of iC 13 EOn S were investigated. With the increase of EO consumption, γcmc increased, but the adsorption efficiency (pC20 ) of surfactant increased. The increase of EO number significantly improved the alkali resistance and salt resistance of iC13 EOn S. Additionally, the influence of different electrolytes and their concentrations on the IFT between iCl3 EOn S solution and n-decane was also studied. At the same salt concentration, iC13 EOn S with shorter EO chains exhibited lower interfacial tension. These results show that the performance of the product can be adjusted by changing the number of EO groups. The study on the relationship between EO number and the performance of iC13 EOn S in this article will help to improve the application efficiency of this surfactant. [ABSTRACT FROM AUTHOR] more...- Published
- 2024
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