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Influence of the contact angle of silica nanoparticles at the air–water interface on the mechanical properties of the layers composed of these particles

Zang, D.Y.; Rio, E.; Delon, G.; Langevin, D.; Wei, B.; Binks, B.P.

Authors

D.Y. Zang

E. Rio

G. Delon

D. Langevin

B. Wei



Abstract

We have studied the properties (surface pressure, compression and shear moduli, texture) of silica nanoparticle layers at the air-water interface. Particle hydrophobicity or, equivalently, the contact angle between particles, air and water, is the main factor that influences surface organization and surface elastic moduli. The surface layers are denser for particles of higher hydrophobicity. The compression and shear moduli, as well as the yield and melt strains, present a maximum for contact angles around 90 degrees. The dependence of the mechanical properties on particle hydrophobicity is closely related to the foamability and stability of the foams made from dispersions.

Citation

Zang, D., Rio, E., Delon, G., Langevin, D., Wei, B., & Binks, B. (2011). Influence of the contact angle of silica nanoparticles at the air–water interface on the mechanical properties of the layers composed of these particles. Molecular Physics, 109(7-10), (1057-1066). doi:10.1080/00268976.2010.542778. ISSN 0026-8976

Journal Article Type Article
Acceptance Date Dec 31, 2011
Online Publication Date Apr 8, 2011
Publication Date Mar 30, 2011
Publicly Available Date
Journal MOLECULAR PHYSICS
Print ISSN 0026-8976
Electronic ISSN 1362-3028
Publisher Taylor & Francis
Peer Reviewed Peer Reviewed
Volume 109
Issue 7-10
Article Number PII 936128807
Pages 1057-1066
DOI https://doi.org/10.1080/00268976.2010.542778
Keywords nanoparticle monolayers contact angle surface rheology foams stabilized foams monolayers emulsions viscoelasticity liquid/liquid shear hydrophobicity gas/liquid rheology bubbles
Public URL https://hull-repository.worktribe.com/output/396325