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Equilibrium and dynamic surface properties of trisiloxane aqueous solutions. Part 1. Experimental results

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journal contribution
posted on 07.09.2010, 11:41 by Hernan Ritacco, Francisco Ortega, Ramon Rubio, Natalia A. Ivanova, Victor Starov
Tensiometry, ellipsometry and Brewster angle microscopy were used to measure equilibrium and dynamic surface tension, as well as surface adsorption, of aqueous solutions of trisiloxane surfactants. Complex adsorption curves, including inflection points, have been found for the surfactants with long etoxylated chains. Surface aggregates at the liquid–air interfaces have been detected for the trisiloxanes that show superspreading behaviour onto moderately hydrophobic surfaces, while no aggregates were detected for the shorter trisiloxanes. The latter suggests that those surface aggregates may act as reservoirs of surfactant molecules to maintain the required surface tension in the course of spreading.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Citation

RITACCO, H.A. ... et al, 2010. Equilibrium and dynamic surface properties of trisiloxane aqueous solutions. Part 1. Experimental results. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 365 (1-3), 199-203.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publication date

2010

ISSN

0927-7757

Language

en

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