A drop impact study of worm-like viscoelastic surfactant solutions

Cooper-White, J. J., Crooks, R. C. and Boger, D. V. (2002) A drop impact study of worm-like viscoelastic surfactant solutions. Colloids And Surfaces A-physicochemical And Engineering Aspects, 210 1: 105-123.

Author Cooper-White, J. J.
Crooks, R. C.
Boger, D. V.
Title A drop impact study of worm-like viscoelastic surfactant solutions
Journal name Colloids And Surfaces A-physicochemical And Engineering Aspects   Check publisher's open access policy
Publication date 2002
Sub-type Article
Volume number 210
Issue number 1
ISSN 0927-7757
Start page 105
End page 123
Total pages 19
Place of publication Amsterdam
Publisher Elsevier Science Bv
Language eng
Abstract In this paper, we investigate the impact dynamics of drops of complexed surfactant solutions. Dilute to semi-dilute solutions of rod-like to worm-like micelles of equimolar cetyltrimethylammonium bromide (CTAB) and sodium salicylate (Nasal) in water (CTAB-NaSal (1:1)) have been dropped onto a smooth hydrophobic surface. The variations in impact behaviour of each solution are discussed in terms of the dynamic surface tension and viscoelastic properties. Increases in the concentration of CTAB-NaSal (1:1) in solution resulted in enhanced reduction in the maximum height achieved during recoil, even though the maximum diameter reached during spreading was equivalent for all solutions over the range of concentrations explored. The equivalence in the maximum diameter during spreading is due to the loss of fluid structure at high extension rates, whilst the resulting reduction in rebound tendency is due to a rapid restructuring of the fluid post impact. The drop impact of such complexed surfactant solutions provides significant insight into the contributions of a 'dynamic' fluid microstructure to the rebound behaviour of dilute 'living polymer' solutions. (C) 2002 Elsevier Science B.V. All rights reserved.
Keyword Chemistry, Physical
drop impact
rebound
surfactant
worm-like micelle
viscoelastic
Concentrated Aqueous-solutions
Elongational Flow
Solid-surface
Rheological Properties
Sodium-salicylate
Cetyltrimethylammonium Bromide
Micellar Solution
Dynamics
Behavior
Tension
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

 
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Created: Wed, 19 Sep 2007, 15:43:06 EST