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Effects of Gas Layer Thickness on Capillary Interactions at Superhydrophobic Surfaces

Eriksson, Mimmi (författare)
KTH,Yt- och korrosionsvetenskap,RISE Res Inst Sweden, Mat & Surface Design, SE-11486 Stockholm, Sweden; CR Colloidal Resource AB, SE-22362 Lund, Sweden.,RISE Research Institutes of Sweden, Sweden; KTH Royal Institute of Technology, Sweden; CR Colloidal Resource AB, Lund, Sweden
Claesson, Per M. (författare)
KTH,Yt- och korrosionsvetenskap,CR Colloidal Resource AB, SE-22362 Lund, Sweden.,KTH Royal Institute of Technology, Sweden; CR Colloidal Resource AB, Lund, Sweden
Järn, Mikael (författare)
ISE Research Institutes of Sweden, Stockholm, Sweden,RISE Res Inst Sweden, Mat & Surface Design, SE-11486 Stockholm, Sweden.
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Wallqvist, Viveca (författare)
ISE Research Institutes of Sweden, Stockholm, Sweden,RISE Res Inst Sweden, Mat & Surface Design, SE-11486 Stockholm, Sweden.
Tuominen, Mikko (författare)
ISE Research Institutes of Sweden, Stockholm, Sweden; Nordtreat Oy, Vantaa, Finland,RISE Res Inst Sweden, Mat & Surface Design, SE-11486 Stockholm, Sweden.;Nordtreat Oy, FI-01730 Vantaa, Finland.
Kappl, Michael (författare)
Max Planck Institute for Polymer Research, Germany,Max Planck Inst Polymer Res, Dept Phys Interfaces, D-55128 Mainz, Germany.
Teisala, Hannu (författare)
Max Planck Institute for Polymer Research, Germany; Amcor Flexibles Valkeakoski, Finland,Max Planck Inst Polymer Res, Dept Phys Interfaces, D-55128 Mainz, Germany.;Amcor Flexibles Valkeakoski Oy, POB 70,Niementie 161, Valkeakoski 37601, Finland.
Vollmer, Doris (författare)
Max Planck Institute for Polymer Research, Germany,Max Planck Inst Polymer Res, Dept Phys Interfaces, D-55128 Mainz, Germany.
Schoelkopf, Joachim (författare)
Omya International AG, Switzerland,Omya Int AG, CH-4665 Oftringen, Switzerland.
Gane, Patrick A. C. (författare)
Aalto University, , Finland; University of Belgrade, Serbia,Aalto Univ, Sch Chem Engn, Dept Bioprod & Biosyst, FI-00076 Aalto, Finland.;Univ Belgrade, Fac Technol & Met, Karnegijeva 4, Belgrade 11000, Serbia.
Makela, Jyrki M. (författare)
Tampere University, Finland,Tampere Univ, Phys Unit, Aerosol Phys Lab, FI-33014 Tampere, Finland.
Swerin, Agne (författare)
KTH,Karlstads universitet,Institutionen för ingenjörs- och kemivetenskaper (from 2013),KTH Royal Institute of Technology, Sweden,Yt- och korrosionsvetenskap,Karlstad Univ, Dept Engn & Chem Sci, SE-65188 Karlstad, Sweden.
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 (creator_code:org_t)
American Chemical Society (ACS), 2024
2024
Engelska.
Ingår i: Langmuir. - : American Chemical Society (ACS). - 0743-7463 .- 1520-5827. ; 40:9, s. 4801-4810
Relaterad länk:
https://doi.org/10.1...
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https://kau.diva-por... (primary) (Raw object)
https://urn.kb.se/re...
https://doi.org/10.1...
https://urn.kb.se/re...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Strongly attractive forces act between superhydrophobic surfaces across water due to the formation of a bridging gas capillary. Upon separation, the attraction can range up to tens of micrometers as the gas capillary grows, while gas molecules accumulate in the capillary. We argue that most of these molecules come from the pre-existing gaseous layer found at and within the superhydrophobic coating. In this study, we investigate how the capillary size and the resulting capillary forces are affected by the thickness of the gaseous layer. To this end, we prepared superhydrophobic coatings with different thicknesses by utilizing different numbers of coating cycles of a liquid flame spraying technique. Laser scanning confocal microscopy confirmed an increase in gas layer thickness with an increasing number of coating cycles. Force measurements between such coatings and a hydrophobic colloidal probe revealed attractive forces caused by bridging gas capillaries, and both the capillary size and the range of attraction increased with increasing thickness of the pre-existing gas layer. Hence, our data suggest that the amount of available gas at and in the superhydrophobic coating determines the force range and capillary growth.

Ämnesord

NATURVETENSKAP  -- Kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)
NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

Chemical Engineering
Kemiteknik

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