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    Aggregation Behavior of Short-Chain PDMS-b-PEO Diblock Copolymers in Aqueous Solutions

    Year: 2003

    Journal: Langmuir 2003, 19, 10073-10076, 20111221

    Authors: Guido Kickelbick, Josef Bauer, Nicola Huesing, Martin Andersson, and Krister Holmberg

    Organizations: Institut für Materialchemie, Technische Universität Wien, Getreidemarkt 9, A-1060 Wien, Austria, and Department of Applied Surface Chemistry, Chalmers University of Technology, SE-412 96 Göteborg, Sweden

    Short-chain poly(dimethylsiloxane)-poly(ethylene oxide) (PDMS-b-PEO) diblock copolymers with different ratios of the hydrophilic to hydrophobic segments were synthesized via coupling of endfunctionalized PDMS and PEO homopolymers. Their aggregation behavior was investigated by tensiometry, fluorescence, and cryogenic transmission electron microscopy. Interestingly, the critical aggregation concentration of the surfactants increased with increasing length of the hydrophobic chain. The electron microscopy studies showed that the surfactants preferentially aggregate into vesicles and lamellar structures.