Journal of the Serbian Chemical Society 2016 Volume 81, Issue 5, Pages: 575-587
https://doi.org/10.2298/JSC151119024P
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An investigation of chitosan and sodium dodecyl sulfate interactions in acetic media
Petrović Lidija B. (Faculty of Technology, Novi Sad)
Milinković Jelena R. (Faculty of Technology, Novi Sad)
Fraj Jadranka L. (Faculty of Technology, Novi Sad)
Bučko Sandra Đ. (Faculty of Technology, Novi Sad)
Katona Jaroslav M. (Faculty of Technology, Novi Sad)
Polymer/surfactant association is a cooperative phenomenon where surfactant
binds to the polymer in the form of aggregates, usually through electrostatic
or hydrophobic forces. As already known, polyelectrolytes may interact with
oppositely charged surfactants through electrostatic attraction that results
in polymer/surfactant complex formation. This behavior could be desirable in
wide range of application of polymer/surfactant mixtures, such as improving
colloid stability, gelling, emulsification and microencapsulation. In the
present study surface tension, turbidity, viscosity and electrophoretic
mobility measurements were used to investigate interactions of cationic
polyelectrolyte chitosan (Ch) and oppositely charged anionic surfactant,
sodium dodecyl sulfate (SDS), in buffered water. Obtained results show the
presence of interactions that lead to Ch/SDS complexes formation at all
investigated pH and for all investigated polymer concentrations. Mechanisms
of interaction, as well as characteristics of formed Ch/SDS complexes, are
highly dependent on their mass ratio in the mixtures, while pH has no
significant influence.
Keywords: polymer/surfactant complexes, cationic polyelectrolyte, anionic surfactant, surface tension, viscosity, electrophoretic mobility
Projekat Ministarstva nauke Republike Srbije, br.
II46010