1 research outputs found
Superior Strong and Tough Nacre-Inspired Materials by Interlayer Entanglement
Natural materials teach that mechanical dissipative interactions
relieve the conflict between strength and toughness and enable fabrication
of strong yet tough artificial materials. Replicating natural nacre
structure has yielded rich biomimetic materials; however, stronger
interlayer dissipation still waits to be exploited to extend the performance
limits of artificial nacre materials. Here, we introduce strong entanglement
as a new artificial interlayer dissipative mechanism and fabricate
entangled nacre materials with superior strength and toughness, across
molecular to nanoscale nacre structures. The entangled graphene nacre
fibers achieved high strength of 1.2 GPa and toughness of 47 MJ/m3, and films reached 1.5 GPa and 25 MJ/m3. Experiments
and simulations reveal that strong entanglement can effectively dissipate
interlayer energy to relieve the conflict between strength and toughness,
acting as natural folded proteins. The strong interlayer entanglement
opens up a new path for designing stronger and tougher artificial
materials to mimic but surpass natural materials