Modulating Rheological Properties of Supramolecular Networks by pH-Responsive Double-Axle Intrusion into γ-Cyclodextrin


  • Dr. Sang Cheon Lee and Dr. Hak Soo Choi are acknowledged for their valuable comments. Supporting Information is available online from Wiley InterScience or from the author.


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A pH-responsive supramolecular network formed from γ-cyclodextrin and linear poly(ethylene glycol)-block-poly(ethyleneimine) (PEG-b-PEI) copolymers (see figure) by double-axle intrusion (DI) can modulate its rheological properties in response to pH changes. The formation of the DI system induces a drastic increase in the rheological properties even under very diluted conditions. The DI system shows significantly reduced viscoelastic properties at low pH.