The Effect of Ageing on the Structure and Properties of Model Liquid Infused Surfaces

Goodband, S.J.; Armstrong, S.; Kusumaatmaja, H.; Voïtchovsky, K.

doi:10.1021/acs.langmuir.0c00059

The Effect of Ageing on the Structure and Properties of Model Liquid Infused Surfaces

Goodband, S.J.; Armstrong, S.; Kusumaatmaja, H.; Voïtchovsky, K.

Authors

S.J. Goodband

S. Armstrong

Professor Halim Kusumaatmaja halim.kusumaatmaja@durham.ac.uk
Professor

Professor Kislon Voitchovsky kislon.voitchovsky@durham.ac.uk
Professor

Abstract

Liquid infused surfaces (LIS) exhibit unique properties that make them ideal candidates for a wide range of applications, from anti-fouling and anti-icing coatings to self-healing surfaces and controlled wetting. However, when exposed to realistic environmental conditions, LIS tend to age and progressively lose their desirable properties, potentially compromising their application. The associated ageing mechanisms are still poorly understood, and results reflecting real-life applications are scarce. Here we track the ageing of model LIS composed of glass surfaces functionalized with hydrophobic nanoparticles and infused with silicone oil. The LIS are fully submerged in aqueous solutions and exposed to acoustic pressure waves for set time intervals. The ageing is monitored by periodic measurements of the LIS’ wetting properties. We also track changes to the LIS’ nanoscale structure. We find that the LIS rapidly lose their slippery properties due to a combination of oil loss, smoothing of the nanoporous functional layer and substrate degradation when directly exposed to the solution. The oil loss is consistent with water microdroplets entering the oil layer and displacing oil away from the surface. These mechanisms are general and could play a role in the ageing of most LIS.

Citation

Goodband, S., Armstrong, S., Kusumaatmaja, H., & Voïtchovsky, K. (2020). The Effect of Ageing on the Structure and Properties of Model Liquid Infused Surfaces. Langmuir, 36(13), 3461-3470. https://doi.org/10.1021/acs.langmuir.0c00059

Journal Article Type	Article
Acceptance Date	Jan 8, 2020
Online Publication Date	Mar 13, 2020
Publication Date	Apr 7, 2020
Deposit Date	Mar 19, 2020
Publicly Available Date	Mar 25, 2020
Journal	Langmuir
Print ISSN	0743-7463
Electronic ISSN	1520-5827
Publisher	American Chemical Society
Peer Reviewed	Peer Reviewed
Volume	36
Issue	13
Pages	3461-3470
DOI	https://doi.org/10.1021/acs.langmuir.0c00059

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