This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1021/ma102624b in citations.
Full Characterization of PB-PEO Wormlike Micelles at Varying Solvent Selectivity
Full Characterization of PB-PEO Wormlike Micelles at Varying Solvent Selectivity
Poly(butadiene-ethylene oxide) (PB-PEO) block copolymers form wormlike micelles in water. These structures can be characterized over a very broad range of length. scales, ranging from the contour and persistence length to the core/corona diameter and the total aggregation number. Here we use fluores...
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Personal Name(s): | Lonetti, B. |
---|---|
Tsigkri, A. / Lang, P.R. / Stellbrink, J. / Willner, L. / Kohlbrecher, J. / Lettinga, M.P. | |
Contributing Institute: |
Neutronenstreuung; ICS-1 Weiche Materie; ICS-3 Neutronenstreuung; JCNS-1 |
Published in: | Macromolecules, 44 (2011) S. 3583 - 3593 |
Imprint: |
Washington, DC
Soc.
2011
|
Physical Description: |
3583 - 3593 |
DOI: |
10.1021/ma102624b |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung |
Series Title: |
Macromolecules
44 |
Subject (ZB): | |
Publikationsportal JuSER |
Poly(butadiene-ethylene oxide) (PB-PEO) block copolymers form wormlike micelles in water. These structures can be characterized over a very broad range of length. scales, ranging from the contour and persistence length to the core/corona diameter and the total aggregation number. Here we use fluorescence microscopy, dynamic and static light scattering and small angle neutron scattering to obtain information on the full range of length scales, while changing the solvent selectivity of the block copolymer by varying the molar ratio of mixtures of N,N-dimethylformamide (DMF) and water. We show that the wormlike micelles become very small and flexible before a transition to spherical micelles sets in decreasing the interfacial tension. We calculated the free energy contributions for the different species using the experimental input and confirmed that the transition to spherical micelles is energetically favored. |