Contact
    Start Publications Equilibrium and dynamic aspects of dodecyltrimethylammonium ...
    ←  Publication Finder
    Attension

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

    Year: 2007

    Journal: Journal of Colloid and Interface Science, Volume 305, Issue 1, 1 January 2007, Pages 142-149, 20111221

    Authors: Thatyane Morimoto Nobrea, Kenneth Wongb, 1 and Maria Elisabete Darbello Zaniquelli

    Organizations: Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil 14040-901, Laboratório de Físico-Química, Centro de Pesquisas de Paulínia, Rhodia Brasil, Paulínia, SP, Brazil

    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.