Characterisation of acid–base surface free energy components of urea–water solutions

Characterisation of acid–base surface free energy components of urea–water solutions Colloids and Surfaces A 538 (2018) 774–780 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Research Paper Characterisation of acid–base surface free energy components of urea–water solutions a, b a,c b a Alexandros Terzis , Elmar Sauer , Guang Yang , Joachim Groß , Bernhard Weigand Institute of Aerospace Thermodynamics (ITLR), Pfaffenwaldring 31, University of Stuttgart, 70569 Stuttgart, Germany Institute of Thermodynamics and Thermal Process Engineering (ITT), Pfaffenwaldring 9, University of Stuttgart, 70569 Stuttgart, Germany Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, 200240 Shanghai, China GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: The objective of this study is to determine the Lifshitz–van der Waals/Acid–Base (LW/AB) surface energy Urea–water-solutions components of urea–water-solutions (UWS) for different urea mass fractions. The surface energy parameters are Contact angle measurements evaluated by ring tensiometry and contact angle measurements of sessile drops placed onto pre-determined solid Acid–base interfacial interactions substrates. Therefore, the energetic characteristics of UWS are evaluated in relation to probe liquids. The results Wetting indicate that aqueous solutions of urea become less polar with increasing urea mass fraction while their overall surface tension is also increased. This is attributed to a significant grow of the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Colloids and Surfaces A: Physicochemical and Engineering Aspects Elsevier

Characterisation of acid–base surface free energy components of urea–water solutions

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier B.V.
ISSN
0927-7757
eISSN
1873-4359
D.O.I.
10.1016/j.colsurfa.2017.11.068
Publisher site
See Article on Publisher Site

Abstract

Colloids and Surfaces A 538 (2018) 774–780 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Research Paper Characterisation of acid–base surface free energy components of urea–water solutions a, b a,c b a Alexandros Terzis , Elmar Sauer , Guang Yang , Joachim Groß , Bernhard Weigand Institute of Aerospace Thermodynamics (ITLR), Pfaffenwaldring 31, University of Stuttgart, 70569 Stuttgart, Germany Institute of Thermodynamics and Thermal Process Engineering (ITT), Pfaffenwaldring 9, University of Stuttgart, 70569 Stuttgart, Germany Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, 200240 Shanghai, China GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: The objective of this study is to determine the Lifshitz–van der Waals/Acid–Base (LW/AB) surface energy Urea–water-solutions components of urea–water-solutions (UWS) for different urea mass fractions. The surface energy parameters are Contact angle measurements evaluated by ring tensiometry and contact angle measurements of sessile drops placed onto pre-determined solid Acid–base interfacial interactions substrates. Therefore, the energetic characteristics of UWS are evaluated in relation to probe liquids. The results Wetting indicate that aqueous solutions of urea become less polar with increasing urea mass fraction while their overall surface tension is also increased. This is attributed to a significant grow of the

Journal

Colloids and Surfaces A: Physicochemical and Engineering AspectsElsevier

Published: Feb 5, 2018

References

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