Bitte benutzen Sie diese Referenz, um auf diese Ressource zu verweisen: doi:10.22028/D291-39302
Volltext verfügbar? / Dokumentlieferung
Titel: Trioctylphosphonium room temperature ionic liquids with perfluorinated groups : Physical properties and surface behavior in comparison with the nonfluorinated analogues
VerfasserIn: Rauber, Daniel
Heib, Florian
Schmitt, Michael
Hempelmann, Rolf
Sprache: Englisch
Titel: Colloids and Surfaces A : Physicochemical and Engineering Aspects
Bandnummer: 537 (2018)
Seiten: 116-125
Verlag/Plattform: Elsevier
Erscheinungsjahr: 2017
Freie Schlagwörter: Ionic liquids
Phosphonium cation
High-precision drop shape analysis
Contact angle
Surface behavior
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: A series of novel ionic liquids (ILs) based on trioctylphosphonium-cations with attached perfluorinated chains and the anions bis(trifluoromethanesulfonyl)imide (NTf2−), dicyanamide (N(CN)2−) and tricyanomethanide (C(CN)3−) was synthesized. Their important physicochemical properties such as thermal behavior, solvatochromic polarities and viscosities were measured and compared to the alkyl analogues in order to investigate the influence of fluorination. The characteristic wetting behavior of these ILs on a hydrophobic modified surface was analyzed using the high-precision drop shape analysis (HPDSA) approach as this method is suitable to analyze highly non-symmetrical droplets. For the fluorinated ILs a more pronounced effect on the thermal transitions with increasing side chain length was found. The introduction of fluorinated alkyl groups leads to anion dependent decomposition temperatures, higher overall viscosities and a non-Newtonian flow shear thinning at higher shear rates. Furthermore, the fluorinated ILs showed a modified wetting behavior on the investigated surface, which was found to result in lower contact angle values and higher pinning compared to the non-fluorinated ILs.
DOI der Erstveröffentlichung: 10.1016/j.colsurfa.2017.10.013
URL der Erstveröffentlichung: https://doi.org/10.1016/j.colsurfa.2017.10.013
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-393022
hdl:20.500.11880/35434
http://dx.doi.org/10.22028/D291-39302
ISSN: 0927-7757
Datum des Eintrags: 15-Mär-2023
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Chemie
Professur: NT - Prof. Dr. Kaspar Hegetschweiler
NT - Prof. Dr. Christopher Kay
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

Dateien zu diesem Datensatz:
Es gibt keine Dateien zu dieser Ressource.


Alle Ressourcen in diesem Repository sind urheberrechtlich geschützt.