The spreading of Newtonian fluids onto smooth solid substrates is well known; the speed of the contact line is given by a competition between capillary driving forces and viscous dissipation, yielding Tanner's law Ris proportional tot1/10. Here, we study the spreading of droplets of complex fluids having either surfactants or polymers dissolved in the fluid. It turns out that both surfactants and polymers slow down the spreading. A special type of surfactants (trisiloxanes), however, leads to a "superspreading", in which the droplet spreads out orders of magnitude quicker than with usual surfactants. The slowing down of the spreading can be explained quantitatively; however, the mechanism of the speeding up remains a puzzle.
Condensed Matter and Statistical Physics - Proceedings of the 8th International Conference on Condensed Matter and Statistical Physics, 8th International Conference on Condensed Matter and Statistical Physics
Jahr
2005
Monat
dec
Tag
1
Zeitschrift
Physica A: Statistical Mechanics and its Applications
%0 Journal Article
%1 citeulike:2459399
%A Rafaı¨,
%A Bonn, Daniel
%B Condensed Matter and Statistical Physics - Proceedings of the 8th International Conference on Condensed Matter and Statistical Physics, 8th International Conference on Condensed Matter and Statistical Physics
%D 2005
%J Physica A: Statistical Mechanics and its Applications
%K wetting surfactant superspreading
%N 1
%P 58--67
%R 10.1016/j.physa.2005.06.017
%T Spreading of non-Newtonian fluids and surfactant solutions on solid surfaces
%U http://dx.doi.org/10.1016/j.physa.2005.06.017
%V 358
%X The spreading of Newtonian fluids onto smooth solid substrates is well known; the speed of the contact line is given by a competition between capillary driving forces and viscous dissipation, yielding Tanner's law Ris proportional tot1/10. Here, we study the spreading of droplets of complex fluids having either surfactants or polymers dissolved in the fluid. It turns out that both surfactants and polymers slow down the spreading. A special type of surfactants (trisiloxanes), however, leads to a "superspreading", in which the droplet spreads out orders of magnitude quicker than with usual surfactants. The slowing down of the spreading can be explained quantitatively; however, the mechanism of the speeding up remains a puzzle.
@article{citeulike:2459399,
abstract = {{The spreading of Newtonian fluids onto smooth solid substrates is well known; the speed of the contact line is given by a competition between capillary driving forces and viscous dissipation, yielding Tanner's law R[is proportional to]t1/10. Here, we study the spreading of droplets of complex fluids having either surfactants or polymers dissolved in the fluid. It turns out that both surfactants and polymers slow down the spreading. A special type of surfactants (trisiloxanes), however, leads to a "superspreading", in which the droplet spreads out orders of magnitude quicker than with usual surfactants. The slowing down of the spreading can be explained quantitatively; however, the mechanism of the speeding up remains a puzzle.}},
added-at = {2017-06-29T07:13:07.000+0200},
author = {Rafa{\i}¨ and Bonn, Daniel},
biburl = {https://www.bibsonomy.org/bibtex/2b015c008ca0849e1129fd7ad090ac5c6/gdmcbain},
booktitle = {Condensed Matter and Statistical Physics - Proceedings of the 8th International Conference on Condensed Matter and Statistical Physics, 8th International Conference on Condensed Matter and Statistical Physics},
citeulike-article-id = {2459399},
citeulike-attachment-1 = {rafai_05_spreading_33650.pdf; /pdf/user/gdmcbain/article/2459399/33650/rafai_05_spreading_33650.pdf; 4a16133cfc4d51db90e9bcfcb02fada99e971acc},
citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.physa.2005.06.017},
citeulike-linkout-1 = {http://www.sciencedirect.com/science/article/B6TVG-4GHSDVB-2/2/f529044f304f7e2b68700edbe63fdb0f},
day = 1,
doi = {10.1016/j.physa.2005.06.017},
file = {rafai_05_spreading_33650.pdf},
interhash = {bea1ac6f1e9cc6f5c16a5cf4ab34cc34},
intrahash = {b015c008ca0849e1129fd7ad090ac5c6},
journal = {Physica A: Statistical Mechanics and its Applications},
keywords = {wetting surfactant superspreading},
month = dec,
number = 1,
pages = {58--67},
posted-at = {2008-03-03 04:39:42},
priority = {2},
timestamp = {2023-02-16T02:38:00.000+0100},
title = {{Spreading of non-Newtonian fluids and surfactant solutions on solid surfaces}},
url = {http://dx.doi.org/10.1016/j.physa.2005.06.017},
volume = 358,
year = 2005
}