Search: onr:"swepub:oai:DiVA.org:kth-266194" >
Electro-Responsive ...
Electro-Responsive Surface Composition and Kinetics of an Ionic Liquid in a Polar Oil
-
- Hjalmarsson, Nicklas (author)
- KTH,Yt- och korrosionsvetenskap,Attana AB, Stockholm, SE-11419, Sweden,KTH Royal Institute of Technology, Sweden
-
- Bergendal, Erik (author)
- KTH,Yt- och korrosionsvetenskap,Attana AB, Stockholm, SE-11419, Sweden,KTH Royal Institute of Technology, Sweden
-
- Wang, Yong-Lei (author)
- KTH,Kemi,Maskinkonstruktion (Inst.),System and Component Design,KTH Royal Institute of Technology, Sweden
-
show more...
-
- Munavirov, Bulat (author)
- KTH,Kemi,Maskinkonstruktion (Inst.),System and Component Design,KTH Royal Institute of Technology, Sweden
-
- Wallinder, Daniel (author)
- Attana AB, SE-11419 Stockholm, Sweden.
-
- Glavatskih, Sergei (author)
- KTH,Maskinkonstruktion (Inst.),Department of Electrical Energy, Metals, Mechanical Constructions and Systems, Ghent University, Ghent, B-9000, Belgium,System and Component Design,Ghent University, Belgium; KTH Royal Institute of Technology, Sweden
-
- Aastrup, Teodor (author)
- Attana AB, SE-11419 Stockholm, Sweden.
-
- Atkin, Rob (author)
- Univ Western Australia, Sch Mol Sci, Perth, WA 6009, Australia.,University of Western Australia, Australia
-
- Furo, Istvan (author)
- KTH,Tillämpad fysikalisk kemi,KTH Royal Institute of Technology, Sweden
-
- Rutland, Mark W. (author)
- RISE,KTH,Yt- och korrosionsvetenskap,Surfaces, Processes and Formulation, RISE Research Institutes of Sweden, Stockholm, SE-50115, Sweden,Yta, process och formulering,KTH Royal Institute of Technology, Sweden
-
show less...
-
(creator_code:org_t)
- 2019-10-03
- 2019
- English.
-
In: Langmuir. - : American Chemical Society (ACS). - 0743-7463 .- 1520-5827. ; 35:48, s. 15692-15700
- Related links:
-
https://urn.kb.se/re...
-
show more...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
show less...
Abstract
Subject headings
Close
- The quartz crystal microbalance (QCM) has been used to study how the interfacial layer of an ionic liquid dissolved in a polar oil at low weight percentages responds to changes in applied potential. The changes in surface composition at the QCM gold surface depend on both the magnitude and sign of the applied potential. The time-resolved response indicates that the relaxation kinetics are limited by the diffusion of ions in the interfacial region and not in the bulk, since there is no concentration dependence. The measured mass changes cannot be explained only in terms of simple ion exchange; the relative molecular volumes of the ions and the density changes in response to ion exclusion must be considered. The relaxation behavior of the potential between the electrodes upon disconnecting the applied potential is more complex than that observed for pure ionic liquids, but a measure of the surface charge can be extracted from the exponential decay when the rapid initial potential drop is accounted for. The adsorbed film at the gold surface consists predominantly of ionic liquid despite the low concentration, which is unsurprising given the surtactant-like structures of (some of) the ionic liquid ions. Changes in response to potential correspond to changes in the relative numbers of cations and anions, rather than a change in the oil composition. No evidence for an electric field induced change in viscosity is observed. This work shows conclusively that electric potentials can be used to control the surface composition, even in an oil-based system, and paves the way for other ion solvent studies.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Keyword
- Double-Layer
- Antiwear Performance
- Friction
- Nanotribology
- Interface
- Additives
- Solvents
- Nanostructure
- Capacitance
- Lubricants
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
-
Langmuir
(Search for host publication in LIBRIS)
To the university's database
- By the author/editor
-
Hjalmarsson, Nic ...
-
Bergendal, Erik
-
Wang, Yong-Lei
-
Munavirov, Bulat
-
Wallinder, Danie ...
-
Glavatskih, Serg ...
-
show more...
-
Aastrup, Teodor
-
Atkin, Rob
-
Furo, Istvan
-
Rutland, Mark W.
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Chemical Science ...
- Articles in the publication
-
Langmuir
- By the university
-
Royal Institute of Technology
-
RISE