Can optical fiber compete with profile analysis tensiometry in critical micelle concentration measurement?

Farzaneh Hajirasouliha*, Hua Yang, Qiang Wu, Dominika Zabiegaj*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Critical micelle concentration (CMC) is one of the important nominal characteristics of the surfactants which can be measured using various methods. In this study, to detect the CMC of two ionic surfactants, cetyltrimethylammonium bromide (CTAB) and sodium dodecyl sulfate (SDS), two methods were utilized: (a) optical fiber and (b) drop profile analysis tensiometry (PAT) techniques. The spectrum width center and surface tension of the solutions at different concentrations of the surfactant were measured. The preliminary outcomes showed a compliance between optical fiber method and PAT technique. However, there were differences in the behavior of two surfactants in optical fiber measurement. In this method, when the solid surface of fiber is put in the system, the interactions between surfactant molecules and the fiber surface must be carefully considered.
Original languageEnglish
Number of pages9
JournalZeitschrift für Physikalische Chemie
Early online date22 Mar 2021
DOIs
Publication statusE-pub ahead of print - 22 Mar 2021

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