Title of article :
Aggregation numbers and microstructure characterization of self-assembled aggregates of poly(ethylene oxide) surfactants and related block-copolymers, studied by spectroscopic methods
Author/Authors :
Vasilescu، نويسنده , , Marilena and Caragheorgheopol، نويسنده , , Agneta and Caldararu، نويسنده , , Horia، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2001
Pages :
26
From page :
169
To page :
194
Abstract :
This review presents typical examples of micellar size measurements and structural characterization of self-assembled systems as determined with spectroscopic methods, selected from our representative results accumulated in recent years of systematic studies. The choice of examples has aimed at emphasizing the potentiality of the methods used in the study of poly(ethylene oxide) (PEO) surfactants. By using the time-resolved fluorescence quenching method aggregation numbers have been determined for direct and reverse micelles as well as for micelle-like clusters formed in (bio)polymer-surfactant solutions. By using specific spectral parameters of a variety of properly chosen molecular probes [fluorescence, UV-VIS and electron spin resonance (ESR) spin probes], problems such as hydration degree and profile of the PEO chains, local viscosity, ordering and packing of surfactant chains have been addressed. The intention was to correlate results obtained from different spectroscopic methods and to refer all polarity data to a common scale, such as Kosowerʹs polarity factor.
Keywords :
micelles , Spectroscopic methods , Poly(ethylene oxide) surfactants
Journal title :
Advances in Colloid and Interface Science
Serial Year :
2001
Journal title :
Advances in Colloid and Interface Science
Record number :
1401855
Link To Document :
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