title: Effect of concentration and temperature on surface tension of sodium hyaluronate saline solutions.
abstract: The effect of concentration and temperature on the surface tension of sodium hyaluronate (NaHA) saline solutions was investigated using the technique of the shape of pendant drops. The decay rate of the surface tension with the increase of NaHA concentration was well-described by the empirical Hua-Rosen equation. Adsorption at the air-liquid interface was estimated using the Gibbs equation. The temperature dependence of a dilute solution and a semidilute entangled solution was numerically fitted with a second-order polynomial equation. The surface behavior of the NaHA saline solutions was interpreted in terms of their known viscoelastic properties.
authors.affiliation: Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, T U Lisbon, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal.
authors.forename: Walkiria
authors.initials: W
authors.lastname: Ribeiro
authors.forename: José Luis
authors.initials: JL
authors.lastname: Mata
authors.forename: Benilde
authors.initials: B
authors.lastname: Saramago
mesh_terms: D006358:Hot Temperature; D006820:Hyaluronic Acid / Q000737:chemistry*; D008956:Models, Chemical; D044367:Phase Transition; D013500:Surface Tension
chemical_list: D006820:Hyaluronic Acid