Characterization, Tuning and Application of Fluorinated Mixed CationicAnionic Surfactant Vesicles - PowerPoint PPT Presentation

Title: Characterization, Tuning and Application of Fluorinated Mixed CationicAnionic Surfactant Vesicles


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Characterization, Tuning and Application of
Fluorinated Mixed Cationic/Anionic Surfactant
Vesicles Barbara Knutson, University of Kentucky,
Dept. of Chemical and Materials Engineering
Fluorinated surfactants are more hydrophobic,
rigid, and self assemble more readily than than
their hydrocarbon counterparts. This research
investigates the formation of spontaneous
vesicles of cationic/anionic surfactants
comprising fluorinated and mixed
fluorinated/hydrocarbon surfactants and explores
the potential to tailor the properties of the
fluorinated vesicle bilayers. Regions of
spontaneous vesicle formation have been
established for the fluorinated/fluorinated
cationic-anionic surfactants HFDPC()/SPFO(-)
and the hydrocarbon-fluorocarbon surfactant pair,
CPB()/SPFO(-), where CPB represents the
hydrocarbon analogue of HFDPC. Successful
transcriptive templating was demonstrated in the
fluorinated vesicle systems. Stable sols of
CPB/SPFO templated particles were produced.
The robustness of fluorinated/fluorinated
bilayers is suggested by the ability to template
at higher precursor to surfactant ratios than in
catanionic fluorinated/hydrocarbon vesicles while
maintaining the original aggregate shape.
Synthesis of hollow silica particles through
transcriptive templating of catanionic vesicles
SPFO CPB HFDPC
Charged silica precursors interacting with
vesicles
Catanionic Vesicles