Capillary Filling in Polymer-Brush-Coated Nanotubes - Molecular Dynamics Results
A. Milchev, D. Dimitrov, and K. Binder. Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)
Abstract
The capillary filling dynamics in cylindrical nanotubes, coated inside by a polymer brush, is investigated by Molecular Dynamics simulation. By varying the degree of brush-fluid interaction in a broad range in between the lyophilic/lyophobic limits, and the molecular weight of the polymer brush, coating the capillary wall, a number of new findings which characterize the imbibition process in coated microchannels are derived. Thus, in case of a lyophilic brush, the meniscus motion in the tube is anticipated by a faster spreading precursor liquid monofilm whose speed depends of the polymer brush properties. The filling dynamics is found to follow the Lucas-Washburn $time$-law. Lyophobic brush coatings, in contrast, reorganize upon meniscus rising and form self-assembled valves in the tube which regulate the flow.
%0 Book Section
%1 statphys23_0220
%A Milchev, A.
%A Dimitrov, D.
%A Binder, K.
%B Abstract Book of the XXIII IUPAP International Conference on Statistical Physics
%C Genova, Italy
%D 2007
%E Pietronero, Luciano
%E Loreto, Vittorio
%E Zapperi, Stefano
%K brush capillary dynamics filling fluid interface nanotube polymer statphys23 topic-6
%T Capillary Filling in Polymer-Brush-Coated Nanotubes - Molecular Dynamics Results
%U http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=220
%X The capillary filling dynamics in cylindrical nanotubes, coated inside by a polymer brush, is investigated by Molecular Dynamics simulation. By varying the degree of brush-fluid interaction in a broad range in between the lyophilic/lyophobic limits, and the molecular weight of the polymer brush, coating the capillary wall, a number of new findings which characterize the imbibition process in coated microchannels are derived. Thus, in case of a lyophilic brush, the meniscus motion in the tube is anticipated by a faster spreading precursor liquid monofilm whose speed depends of the polymer brush properties. The filling dynamics is found to follow the Lucas-Washburn $time$-law. Lyophobic brush coatings, in contrast, reorganize upon meniscus rising and form self-assembled valves in the tube which regulate the flow.
@incollection{statphys23_0220,
abstract = {The capillary filling dynamics in cylindrical nanotubes, coated inside by a polymer brush, is investigated by Molecular Dynamics simulation. By varying the degree of brush-fluid interaction in a broad range in between the lyophilic/lyophobic limits, and the molecular weight of the polymer brush, coating the capillary wall, a number of new findings which characterize the imbibition process in coated microchannels are derived. Thus, in case of a lyophilic brush, the meniscus motion in the tube is anticipated by a faster spreading precursor liquid monofilm whose speed depends of the polymer brush properties. The filling dynamics is found to follow the Lucas-Washburn $\sqrt{time}$-law. Lyophobic brush coatings, in contrast, reorganize upon meniscus rising and form self-assembled valves in the tube which regulate the flow.},
added-at = {2007-06-20T10:16:09.000+0200},
address = {Genova, Italy},
author = {Milchev, A. and Dimitrov, D. and Binder, K.},
biburl = {https://www.bibsonomy.org/bibtex/2d5407a0dfe6b89a0d89c8e34c93668f1/statphys23},
booktitle = {Abstract Book of the XXIII IUPAP International Conference on Statistical Physics},
editor = {Pietronero, Luciano and Loreto, Vittorio and Zapperi, Stefano},
interhash = {0b94d3269906be447db93af0a8c805fd},
intrahash = {d5407a0dfe6b89a0d89c8e34c93668f1},
keywords = {brush capillary dynamics filling fluid interface nanotube polymer statphys23 topic-6},
month = {9-13 July},
timestamp = {2007-06-20T10:16:14.000+0200},
title = {Capillary Filling in Polymer-Brush-Coated Nanotubes - Molecular Dynamics Results},
url = {http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=220},
year = 2007
}