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Challenge: Ceramic aerogels have great thermal insulation potential, but their mechanical stretchability and thermal stability are insufficient in extreme environments, limiting their application in thermal protection systems such as spacesuits and hypersonic vehicles.
Method: Professor Si Yang's team from Donghua University proposed a programmable shape deformation strategy to design binary network topology within ceramic aerogels to effectively dissipate stress and block heat transfer.
Innovation 1: The special topological design, including kirigami-layered aerogels for bearing load stress and randomly combined aerogels with pre-stored mechanical energy for transferring tensile stress, effectively achieves unexpected mechanical tensile properties and thermal stability.
Innovation 2: The resulting robust super-aerogel has excellent structural stability, topology-derived mechanical stretchability up to 85% strain, excellent resilience to 500 cycles of 50% tensile strain, 1000 cycles of 60% buckling strain, and 500 cycles of 50% compressive strain, and temperature-invariant tensile recovery performance.
Innovation 3: Meanwhile, the low thermal conductivity of 33.01 mW m−1 K−1 and non-stretched thermal insulation properties make the ceramic super-aerogel an ideal alternative material for various applications.
