RHEOLOGICAL BEHAVIOR OF WORM-LIKE MICELLES - EFFECT OF ELECTROSTATIC INTERACTIONS

Citation
Sj. Candau et al., RHEOLOGICAL BEHAVIOR OF WORM-LIKE MICELLES - EFFECT OF ELECTROSTATIC INTERACTIONS, Nuovo cimento della Societa italiana di fisica. D, Condensed matter,atomic, molecular and chemical physics, biophysics, 16(9), 1994, pp. 1401-1410
Citations number
34
Categorie Soggetti
Physics
ISSN journal
03926737
Volume
16
Issue
9
Year of publication
1994
Pages
1401 - 1410
Database
ISI
SICI code
0392-6737(1994)16:9<1401:RBOWM->2.0.ZU;2-H
Abstract
Both linear and non-linear viscoelasticity experiments have been perfo rmed in semi-dilute micellar aqueous solutions of ethanediyl-alpha,ome ga-bis (dodecylmethylammonium bromide) as a function of solution chlor ide (NaCl) concentration. The results suggest that both linear and non -linear properties are affected by the electrostatic interactions. In particular, the plateau modulus GI and the ratio sigma(m)/G(infinity)( '), where sigma(m) represents the plateau value in a stress-shear rate experiment, are enhanced as the electrostatic interactions are screen ed by addition of salt. The zero-shear viscosity is lowered upon addit ion of NaCl, due Likely to an exchange of the Cl- ions with the Br- co unterions.