In: Polyelectrolytes ISBN: 978 - 1 - 63485 - 836 - 6
Editor: Philip Guerrero © 2016 Nova Science Publishers, Inc.
Chapter 3
COMPLEXES OF POLY[SODIUM(SULFAMATE/
CARBOXYLATE)ISOPRENE] WITH
DODECYLTRIMETHYLAMMONIUM
BROMIDE: NANOPARTICLES
WITH TUNABLE AGGREGATION
Aristeidis Papagiannopoulos and Stergios Pispas
Theoretical and Physical Chemistry Institute,
National Hellenic Research Foundation, Athens, GreeceABSTRACT
We present the complexation of the linear, inherently hydrophobic,
anionic polyelectrolyte poly[sodium(sulfamate/carboxylate)isoprene]
(SCPI) with the cationic surfactant dodecyltrimethylammonium bromide
(DTMAB), studied mainly by light scattering methods. At low
surfactant concentrations the polyelectrolyte aggregates (already formed
in surfactant-free solutions) shrink, whereas at higher surfactant
concentrations secondary aggregation takes place leading to a strong
increase in scattered intensity and a twofold increase in size. The
charge of the aggregates decreases abruptly in the first complexation
regime while more mildly in the second one as observed by ζ-
potential measurements in electrophoretic light scattering. The resulting E-mail: [email protected].