Equilibrium and dynamic aspects of dodecyltrimethylammonium bromide adsorption at the air/water interface in the presence of λ-carrageenan

• Published in: Journal of colloid and interface science Vol. 305; no. 1; pp. 142 - 149
• Main Authors: Nobre, Thatyane Morimoto, Wong, Kenneth, Zaniquelli, Maria Elisabete Darbello
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 2007; Elsevier
• Subjects: Adsorption; Carrageenan; Chemistry; Dilational elasticity; Dodecyltrimethylammonium bromide; Exact sciences and technology; General and physical chemistry; Polyelectrolyte; Surface physical chemistry; Surface tension; Polyelectrolyte; Dodecyltrimethylammonium bromide; Surface tension; Dilational elasticity; Carrageenan; Adsorption; Gas liquid interface; Elasticity; Air water interface; Physicochemical properties; Dynamic equilibrium
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2006.09.044

In this work we present equilibrium and dynamic surface tension together with dilational elasticity data for dodecyltrimethylammonium bromide in the presence of
λ-carrageenan, a sulfated polysaccharide extracted from algae. The critical aggregation concentration and (CAC) and critical micellar concentration CMC of the mixed system were determined and shown to have a direct influence on the elasticity modulus. The behavior of the adsorption kinetics was shown to be dependent on the surfactant to polyelectrolyte charge ratio or excess species in the bulk solution.
In this work we present equilibrium and dynamic surface tension together with dilational elasticity data for DTAB/
λ-carrageenan, a sulfated polysaccharide extracted from algae.