Recyclable nacre-inspired elastomer via dynamic supramolecular nanosheets

Polysulfide polyurethane–urea-based dielectric composites with CeO2-loaded MXene exhibiting high self-healing efficiency

“…3 Although Des enjoy the title of artificial muscle, one of the most lacking features of Des that distinguish them from human muscles is their inability to heal themselves, as human muscles can heal rapidly after injury, which in the case of Des is mainly a consequence of dielectric breakdown from large actuation voltages. Many Des with self-healing effects have been investigated through the introduction of reversible covalent or non-covalent bonds in the chain segments, for example using metal–ligand coordination, 4 ionic bonding, 5 hydrogen bonding, 6 and Diels–Alder bonding, 7 but there are still few Des that guarantee high self-healing capacity and sound dielectric properties at the same time.…”

Bioinspired Integrated Auxetic Elastomers Constructed by a Dual Dynamic Interfacial Healing Strategy

“…[36,37] At the same time, disulfide bonds make the dynamic bond exchange possible, [38,39] endowing them with autonomous healing capacities. [40,41] After cutting PTHF-4AD-DAHP into a corrugated re-entrant structure as a hard skeleton followed by the complementary shape-filling of PTHF-4AD as a soft matrix, an integrated auxetic elastomer (IAE) has been successfully obtained where the dual dynamic interfacial healing is achieved by hydrogen bonds and disulfide bonds (Scheme 1b). The resulting IAE was a flat, void-free, and continuous solid at the macroscopic level, and exhibited a tensile force of 92 N and the Poisson's ratio ranging from −0.13 to 0 in the process of stretching to 104%, which was further confirmed by finite element analysis (FEA).…”