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Dynamic matrix and interfacial Diels-Alder bonding endows graphene oxide/polyurethane nanocomposites with self-healing, mechanical robustness, and enhanced hydrogen barrier performance
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DOI：10.1016/j.compositesb.2026.114072.png)
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Abstract
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• Dynamic Diels-Alder bonds were introduced in both matrix and interface. • Interfacial DA bonds improved stress transfer and healing efficiency. • The 5 wt% fGO/PU-DA nanocomposite showed a 75% increase in tensile strength. • Tensile strength was restored, while toughness exceeded 100% healing efficiency. • The 5 wt% fGO/PU-DA nanocomposite reduced H2 permeability coefficient by 64%.
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