Viscometric Study of the Effects of Added Electrolytes on the Critical Micelle Concentration of Triton X-100 in Aqueous Medium

Authors

  • G.O. Ogunlusi
  • T. O. Bakare
  • A. J. Akodu
  • I. A. Busari

Abstract

Viscometric study of the effect of five electrolyte additives (HCl, HClO4, HNO3, Na2SO4 and NaCl) on the critical micelle concentration of a nonionic surfactant, Triton X-100, was investigated at 30 0C using U-type Ostwald viscometer. Density measurements of Triton X-100 solutions in the presence of varying electrolyte concentrations were carried out using pycnometer. The electrolytes were studied in the concentration range 0 – 0.1 mol dm-3. All the electrolytes were observed to lower the critical micelle concentration (CMC) of TritonX-100 significantly in the concentration range studied with HCl having the highest CMC decreasing effect up to a factor of over 400. The results have been explained based on salting-out effect. The observed trend of the CMC lowering effect of the acids: HClO4 < HNO3 < HCl followed the Hofmeister series while greater CMC reducing effect of Na2SO4 than that of NaCl can be attributed to ionic strength effect. Key words: additives, critical micelle concentration, electrolyte, salting-out, viscosity

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Published

2019-06-11

How to Cite

Ogunlusi, G., Bakare, T. O., Akodu, A. J., & Busari, I. A. (2019). Viscometric Study of the Effects of Added Electrolytes on the Critical Micelle Concentration of Triton X-100 in Aqueous Medium. Journal of Chemical Society of Nigeria, 44(3). Retrieved from https://journals.chemsociety.org.ng/index.php/jcsn/article/view/301

Issue

Vol. 44 No. 3 (2019)

Section

Articles

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Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution (CC-BY) 4.0 License that allows others to share the work with an acknowledgment of the work’s authorship and initial publication in this journal.