Worm-like micelles of CTAB and sodium salicylate under turbulent flow

Roberta K. Rodrigues, Marcelo A. Da Silva, Edvaldo Sabadini

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Polymers with high molecular weight and worm-like micelles are drag-reducing agents under turbulent flow. However, in contrast to the polymeric systems, the worm-like micelles do not undergo mechanical degradation due to the turbulence, because their macromolecular structure can be spontaneously restored. This very favorable property, together with their drag-reduction capability, offer the possibility to use such worm-like micelles in heating and cooling systems to recirculate water while expending less energy. The formation, growth, and stability of worm-like micelles formed by cetyltrimethylammonium bromide (CTAB) and sodium salicylate(NaSal) were investigated using the self-fluorescence of salicylate ions and the ability of the giant micelles to promote hydrodynamic drag reduction under turbulent flow. The turbulence in solutions of CTAB-Sal was produced within the double-gap cell of a rotational rheometer. Detailed diagrams were obtained for different ratios of Sal and CTAB, which revealed transitions associated with the thermal stability of giant micelles under turbulent flow.

Original languageEnglish
Pages (from-to)13875-13879
Number of pages5
JournalLangmuir
Volume24
Issue number24
Early online date18 Nov 2008
DOIs
Publication statusPublished - 16 Dec 2008

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Rodrigues, R. K., Da Silva, M. A., & Sabadini, E. (2008). Worm-like micelles of CTAB and sodium salicylate under turbulent flow. Langmuir, 24(24), 13875-13879. https://doi.org/10.1021/la802890x