No abstract

A stretchable and elastic supramolecular hydrogel with water-responsive shape-memory behavior, which can be realized under mild and green conditions, was developed.

Electroactive supramolecular gels with multistimuli responsiveness were fabricated through host–guest interactions between a host polymer containing β-cyclodextrin (CD) and an ionic liquid (IL) type asymmetric gemini guest, which contains both ferrocene (Fc) and bis(trifluoromethyl-sulfonyl)imide (TFSI–) as the respective α- and ω-guest groups. Owing to the multiple stimuli-responsiveness of the host–guest interactions, reversible sol–gel phase transition could be triggered by various stimuli, including temperature, electrochemical/chemical redox and anion-exchange reactions. Due to the intrinsically conductive properties of the IL gemini guest, the sol–gel transition behavior could be electrochemically controlled by the applied voltage, without using additional supporting electrolyte.

No abstract

Polyurethane–urea supramolecular hydrogel with excellent mechanical and processible properties is developed. The mechanical properties including shear modulus, elongation at break, tensile strength and compression stress can be adjusted by altering the diisocyanate content.