Handle URI:
http://hdl.handle.net/10754/600200
Title:
Wrinkling in the deflation of elastic bubbles
Authors:
Aumaitre, Elodie; Knoche, Sebastian; Cicuta, Pietro; Vella, Dominic
Abstract:
The protein hydrophobin HFBII self-assembles into very elastic films at the surface of water; these films wrinkle readily upon compression. We demonstrate and study this wrinkling instability in the context of non-planar interfaces by forming HFBII layers at the surface of bubbles whose interfaces are then compressed by deflation of the bubble. By varying the initial concentration of the hydrophobin solutions, we are able to show that buckling occurs at a critical packing fraction of protein molecules on the surface. Independent experiments show that at this packing fraction the interface has a finite positive surface tension, and not zero surface tension as is usually assumed at buckling. We attribute this non-zero wrinkling tension to the finite elasticity of these interfaces. We develop a simple geometrical model for the evolution of the wrinkle length with further deflation and show that wrinkles grow rapidly near the needle (used for deflation) towards the mid-plane of the bubble. This geometrical model yields predictions for the length of wrinkles in good agreement with experiments independently of the rheological properties of the adsorbed layer. © 2013 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.
Citation:
Aumaitre E, Knoche S, Cicuta P, Vella D (2013) Wrinkling in the deflation of elastic bubbles. Eur Phys J E 36. Available: http://dx.doi.org/10.1140/epje/i2013-13022-3.
Publisher:
Springer Nature
Journal:
The European Physical Journal E
KAUST Grant Number:
KUK-C1-013-04
Issue Date:
Mar-2013
DOI:
10.1140/epje/i2013-13022-3
PubMed ID:
23504485
Type:
Article
ISSN:
1292-8941; 1292-895X
Sponsors:
EPSRC and Unilever plc. have funded this project through a CASE award. This publication is based on work supported in part by Grant No. KUK-C1-013-04, made by King Abdullah University of Science and Technology (KAUST) and in part by an Oppenheimer Early Career Research Fellowship (D.V.).
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorAumaitre, Elodieen
dc.contributor.authorKnoche, Sebastianen
dc.contributor.authorCicuta, Pietroen
dc.contributor.authorVella, Dominicen
dc.date.accessioned2016-02-28T06:45:05Zen
dc.date.available2016-02-28T06:45:05Zen
dc.date.issued2013-03en
dc.identifier.citationAumaitre E, Knoche S, Cicuta P, Vella D (2013) Wrinkling in the deflation of elastic bubbles. Eur Phys J E 36. Available: http://dx.doi.org/10.1140/epje/i2013-13022-3.en
dc.identifier.issn1292-8941en
dc.identifier.issn1292-895Xen
dc.identifier.pmid23504485en
dc.identifier.doi10.1140/epje/i2013-13022-3en
dc.identifier.urihttp://hdl.handle.net/10754/600200en
dc.description.abstractThe protein hydrophobin HFBII self-assembles into very elastic films at the surface of water; these films wrinkle readily upon compression. We demonstrate and study this wrinkling instability in the context of non-planar interfaces by forming HFBII layers at the surface of bubbles whose interfaces are then compressed by deflation of the bubble. By varying the initial concentration of the hydrophobin solutions, we are able to show that buckling occurs at a critical packing fraction of protein molecules on the surface. Independent experiments show that at this packing fraction the interface has a finite positive surface tension, and not zero surface tension as is usually assumed at buckling. We attribute this non-zero wrinkling tension to the finite elasticity of these interfaces. We develop a simple geometrical model for the evolution of the wrinkle length with further deflation and show that wrinkles grow rapidly near the needle (used for deflation) towards the mid-plane of the bubble. This geometrical model yields predictions for the length of wrinkles in good agreement with experiments independently of the rheological properties of the adsorbed layer. © 2013 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.en
dc.description.sponsorshipEPSRC and Unilever plc. have funded this project through a CASE award. This publication is based on work supported in part by Grant No. KUK-C1-013-04, made by King Abdullah University of Science and Technology (KAUST) and in part by an Oppenheimer Early Career Research Fellowship (D.V.).en
dc.publisherSpringer Natureen
dc.titleWrinkling in the deflation of elastic bubblesen
dc.typeArticleen
dc.identifier.journalThe European Physical Journal Een
dc.contributor.institutionUniversity of Cambridge, Cambridge, United Kingdomen
dc.contributor.institutionUniversitat Dortmund, Dortmund, Germanyen
dc.contributor.institutionUniversity of Oxford, Oxford, United Kingdomen
kaust.grant.numberKUK-C1-013-04en

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