Strong, Ultralight Nanofoams with Extreme Recovery and Dissipation by Manipulation of Internal Adhesive Contacts
- 29 April 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 14 (7), 8383-8391
- https://doi.org/10.1021/acsnano.0c02422
Abstract
Advances in three-dimensional nanofabrication techniques have enabled the development of lightweight solids, such as hollow nanolattices, having record values of specific stiffness and strength, albeit at low production throughput. At the length scales of the structural elements of these solids—which are often tens of nanometers or smaller—forces required for elastic deformation can be comparable to adhesive forces, rendering the possibility to tailor bulk mechanical properties based on the relative balance of these forces. Herein, we study this interplay via the mechanics of ultralight ceramic-coated carbon nanotube (CNT) structures. We show that ceramic-CNT foams surpass other architected nanomaterials in density-normalized strength, and that when the structures are designed to minimize internal adhesive interactions between CNTs, >97% strain after compression beyond densification is recovered. Via experiments and modeling, we study the dependence of the recovery and dissipation on the coating thickness, demonstrate that internal adhesive contacts impede recovery, and identify design guidelines for ultralight materials to have maximum recovery. The combination of high recovery and dissipation in ceramic-CNT foams may be useful in structural damping and shock absorption, and the general principles could be broadly applied to both architected and stochastic nanofoams.Funding Information
- Agence Nationale de la Recherche (ANR-11-IDEX-0001-02)
- Lawrence Livermore National Laboratory (DE-AC52-07NA27344)
- Air Force Office of Scientific Research (FA9550-11-1-0089, FA9550-16-1-0011)
- National Science Foundation (CMMI-1463344, CMMI-1662101, CMMI-1724519, DMR-1120901)
- MIT-Skoltech Next Generation Program
- Toyota Research Institute
- NSERC Postdoctoral Fellowship Program
This publication has 41 references indexed in Scilit:
- Laser Printing of Nanoparticle Toner Enables Digital Control of Micropatterned Carbon Nanotube GrowthACS Applied Materials & Interfaces, 2013
- A Versatile, Ultralight, Nitrogen‐Doped Graphene FrameworkAngewandte Chemie, 2012
- Graphene coating makes carbon nanotube aerogels superelastic and resistant to fatigueNature Nanotechnology, 2012
- Covalently bonded three-dimensional carbon nanotube solids via boron induced nanojunctionsScientific Reports, 2012
- Super‐Compressibility of Ultralow‐Density Nanoporous SilicaAdvanced Materials, 2012
- Ultralow density carbon aerogels with low thermal conductivity up to 2000°CMaterials Letters, 2011
- Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapour depositionNature Materials, 2011
- Collective Mechanism for the Evolution and Self-Termination of Vertically Aligned Carbon Nanotube GrowthThe Journal of Physical Chemistry C, 2009
- Self-Oriented Regular Arrays of Carbon Nanotubes and Their Field Emission PropertiesScience, 1999
- Nanomechanics of Carbon Tubes: Instabilities beyond Linear ResponsePhysical Review Letters, 1996