Dynamic surface activity of polyaldehyde dextran nanoparticles and their effect on a model surfactant adsorption at the air–water interface
Katarzyna Jabłczyńska , Tomasz Robert Sosnowski
AbstractIn the framework of this study, measurements of dynamic surface tension have been carried out in systems comprising nanoparticles formed from chemically modified polyaldehyde dextran (PAD). The nanostructures were obtained from biocompatible polysaccharides by successive oxidation and reactive coiling in aqueous solution. The dynamic surface tension of the samples was determined by the maximum bubble pressure (MBP) method and by the axisymmetric drop shape analysis (ADSA). Experiments with harmonic area perturbations were also carried out in order to determine surface dilational visco-elasticity. The experimental data were interpreted using the Ward and Tordai’s equation. The system equilibrium surface tension and the nanoparticles diffusion coefficient was determined. The conducted experiments show a significant surface activity of the studied PAD nanoparticles and their impact on the surface dilational elasticity. Furthermore, the presence of the PAD nanoparticles causes changes in the adsorption process on air-water interface in the systems comprising a model nonionic surfactant.
The 22nd Polish Conference of Chemical and Process Engineering: Proceedings, 2016, Faculty of Process and Environmental Engineering, ISBN 978-83-61997-75-7, 1584 p.
Proceedings OKIChiP 2016.pdf / No licence information (file archived - login or check accessibility on faculty)
|Keywords in English||polysaccharide nanoparticles, lung surfactant, dynamic surface tension|
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