Polymer tubes with longitudinal composition gradient by face-to-face wetting

Titelangaben

Kriha, Olaf ; Göring, Petra ; Milbradt, Marc ; Agarwal, Seema ; Steinhart, Martin ; Wehrspohn, Ralf B. ; Wendorff, Joachim H. ; Greiner, Andreas:
Polymer tubes with longitudinal composition gradient by face-to-face wetting.
In: Chemistry of Materials. Bd. 20 (2008) Heft 3 . - S. 1076-1081.
ISSN 1520-5002
DOI: https://doi.org/10.1021/cm702088v

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Abstract

Nanoporous and macroporous templates were simultaneously infiltrated from both of their opposite surfaces using model polymers labeled with fluorescent probes or bearing probe molecules detectable by energy-dispersive X-ray spectroscopy by precursor wetting. Face-to-face wetting with polymeric solutions resulted in partial mixing of both components, leading to tubular nanostructures characterized by a longitudinal composition gradient. Mixing of the components infiltrated from the opposite surfaces could be prevented by face-to-face wetting with polymeric melts, leading to the formation of tubular components predominantly consisting of the pure components that were separated by sharp interfaces.