Adsorption of phytosterol ethoxylates on silica in an aprotic room-temperature ionic liquid

Sakai, Kenichi, Onuma, Yosuke, Torigoe, Kanjiro, Biggs, Simon, Sakai, Hideki and Abe, Masahiko (2011) Adsorption of phytosterol ethoxylates on silica in an aprotic room-temperature ionic liquid. Langmuir, 27 7: 3244-3248. doi:10.1021/la200046k


Author Sakai, Kenichi
Onuma, Yosuke
Torigoe, Kanjiro
Biggs, Simon
Sakai, Hideki
Abe, Masahiko
Title Adsorption of phytosterol ethoxylates on silica in an aprotic room-temperature ionic liquid
Journal name Langmuir   Check publisher's open access policy
ISSN 0743-7463
1520-5827
Publication date 2011-04-05
Sub-type Article (original research)
DOI 10.1021/la200046k
Volume 27
Issue 7
Start page 3244
End page 3248
Total pages 5
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract The adsorption of a nonionic surfactant at a silica/room-temperature ionic liquid interface has been characterized on the basis of analytical data obtained through a combination of surface force measurements, in situ soft-contact atomic force microscope (AFM) images, and quartz crystal microbalance with dissipation monitoring (QCM-D) data. The surfactant employed in this study is a kind of phytosterol ethoxylate (BPS-20), and the ionic liquid selected here is aprotic 1-ethyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide (EmimTFSI). This ionic liquid spontaneously forms solvation layers on silica, being composed of an Emim+ cation layer and EmimTFSI ion pair layers. The addition of BPS-20 disrupts these solvation layers and suggests a surfactant layer adsorbed at the interface. This is the first report demonstrating the adsorption of nonionic surfactants at the solid/aprotic ionic liquid interface.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Faculty of Engineering, Architecture and Information Technology Publications
 
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