1 Metal Mimics: Lightweight, Strong, and Tough (Nano)Composites and 1 Nanomaterial Assemblies 2 3 Adam J. Clancy, a * David B. Anthony, b Francois De Luca c 4 5 a) Department of Chemistry, University College London, London, WC1E 7JE, U.K. 6 b) Department of Chemistry, Imperial College London, SW7 2AZ, U.K. 7 c) National Physical Laboratory, Teddington, TW11 0LW, U.K. 8 9 *Corresponding author, email: [email protected] 10 11 Keywords: Composite, nanomaterials, toughness, carbon nanotube, graphene, nanotechnology, nacre, nano- 12 tube yarn, supracrystal, carbon fibre 13 14 Abstract 15 The ideal structural material would be high strength and stiffness, with a tough ductile failure, all with a low 16 density. Historically, no such material exists, and materials engineers have had to sacrifice a desired property 17 during materials selection, with metals (high density), fibre composites (brittle failure), and polymers (low 18 stiffness) having fundamental limitations on at least one front. The ongoing revolution of nanomaterials 19 provides a potential route to build on the potential of fibre-reinforced composites, matching their strength 20 while integrating toughening behaviours akin to metal deformations all while using low weight constituents. 21 Here, the challenges, approaches, and recent developments of nanomaterials for structural applications are 22 discussed, with an emphasis on improving toughening mechanisms – often the neglected factor in a field 23 which chases strength and stiffness. 24 25
Metal Mimics: Lightweight, Strong, and Tough (Nano)Composites and Nanomaterial Assemblies
May 17, 2023
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