A Stimulus-Response and Self-Healing Supramolecular Polymer Gel Based on Host-Guest Interactions

A supramolecular polymer gel is formed by host-guest interactions between a DB24C8-based bis(crown ether) and a copolymer containing the dibenzylammonium moiety. The formation of the gel and its cross-linked networks structure are evidenced by H-1 NMR spectroscopy, viscometry, and SEM. Interestingly, the gel shows both pH- and thermoesponsive behaviors, and excellent self-healing properties. The self-healing property of the gel is tested by rheological measurements, and it can also be seen visually and directly. The presented work provides a new strategy for the construction of the self-healing supramolecular polymer gels with potential applications in smart materials.