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Mechanical compression to characterize the robustness of liquid marbles

Liu, Zhou; Fu, Xiangyu; Binks, Bernard P.; Shum, Ho Cheung

Authors

Zhou Liu

Xiangyu Fu

Ho Cheung Shum

Abstract

In this work, we have devised a new approach to measure the critical pressure that a liquid marble can withstand. A liquid marble is gradually squeezed under a mechanical compression applied by two parallel plates. It ruptures at a sufficiently large applied pressure. Combining the force measurement and the high-speed imaging, we can determine the critical pressure that ruptures the liquid marble. This critical pressure, which reflects the mechanical robustness of liquid marbles, depends on the type and size of the stabilizing particles as well as the chemical nature of the liquid droplet. By investigating the surface of the liquid marble, we attribute its rupture under the critical pressure to the low surface coverage of particles when highly stretched. Moreover, the applied pressure can be reflected by the inner Laplace pressure of the liquid marble considering the squeezing test is a quasi-static process. By analyzing the Laplace pressure upon rupture of the liquid marble, we predict the dependence of the critical pressure on the size of the liquid marble, which agrees well with experimental results.

Journal Article Type Article
Publication Date Oct 20, 2015
Journal Langmuir
Print ISSN 0743-7463
Electronic ISSN 1520-5827
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 31
Issue 41
Pages 11236-11242
Institution Citation Liu, Z., Fu, X., Binks, B. P., & Shum, H. C. (2015). Mechanical compression to characterize the robustness of liquid marbles. Langmuir : the ACS journal of surfaces and colloids, 31(41), 11236-11242. doi:10.1021/acs.langmuir.5b02792
DOI https://doi.org/10.1021/acs.langmuir.5b02792
Keywords Liquid marble; Mechanical robustness; Liquid interface; Particles
Publisher URL http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.5b02792
Copyright Statement ©2016 University of Hull
Additional Information This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.langmuir.5b02792 .

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Copyright Statement
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