Self-healing magnetorheological elastomers based on thermoreversible Diels–Alder networks

Abstract Magnetorheological (MR) elastomers are a class of stimuli-responsive materials which the damping and stiffness can be reversibly tailored by applying magnetic fields. However, concerns such as fatigue damage, insufficient MR efficiencies with low loadings particles or highly crosslinked elastomers, lack reprocessability remain unaddressed for conventional elastomers. To this end, series self-healing (SHMRE) were prepared based on thermoreversible Diels–Alder covalent crosslinks. The application pulses yielded pre-aligned chains within curing matrix strongly influenced SHMRE rheological properties. resulting composites do not only exhibit large effect but also efficient properties at room temperature. We found that particle loading field-induced orientation aggregates affect magnitude response, mechanical strength healing efficiency. In addition, response is With temperature increase from to 70 °C, change in 90% 462% observed while retain solid viscoelastic state 50 wt% loading. Interestingly, features synthesized networks allow potential when heating these systems above gel transition (89 °C–90 °C). final viscous makes it possible potentially restructured field, retained upon cooling network recovered. proposed shown reprocessable solution substitute classical wider context generalized materials.