Dynamic Supramolecular Polymer Networks Constructed by Synergistic Dual Host-Guest Interactions
摘要
The cross-linked structure plays a decisive role in determining the mechanical properties of polymer materials. Although various supramolecular polymer networks (SPNs) based on noncovalent bonds have been developed, few studies have focused on constructing SPNs through dual host-guest interactions between macro- and small-molecular building blocks. Herein, we utilized these building blocks to prepare SPNs aimed at addressing this gap. Specifically, the supramolecular polymer network SPN-EF was prepared through crown ether and pillararene-based dual host-guest interactions. Compared to the control systems SPN-AC and SPN-BD, which incorporate only single type of host-guest interaction (based on either crown ether or pillararene), the SPN-EF integrate the advantages of both systems, exhibiting balanced and enhanced mechanical properties. Moreover, the resulting SPN gels retain significant dynamic properties, including excellent self-healing capability and stimuli-responsiveness.