Electrochemical redox responsive supramolecular self-healing hydrogels based on host-guest interaction

摘要

A supramolecular hydrogel was prepared through the host-guest interaction between beta-cyclodextrin (beta-CD) and ferrocene (Fc) with two polymers as pendant groups. Reversible gel-sol transition was observed with the alternative stimuli of a positive potential (or an oxidant) and a negative potential (or a reductant). The hydrogel not only had good self-healing ability due to the dynamic host-guest interaction, but also was prepared under mild conditions and could respond to moderate electrochemical stimuli. Good biocompatibility endowed the hydrogel with potential practical and real-life applications, especially in tissue engineering and drug release field.