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      Elastic Recovery Properties of Ultralight Carbon Nanotube/Carboxymethyl Cellulose Composites

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          Abstract

          Ultralight materials exhibit superelastic behavior depending on the selection, blending, and carbonization of the materials. Recently, ultimate low-density materials of 5 mg/cm 3 or less have attracted attention for applications such as sensors, electrodes, and absorbing materials. In this study, we fabricated an ultralight material composed of single-walled carbon nanotubes (CNT) and sodium carboxymethyl cellulose (CMC), and we investigated the effect of density, composition, and weight average molecular weight of CMC on elastic recovery properties of ultralight CNT/CMC composites. Our results showed that the elastic recovery properties can be improved by reducing the density of the composite, lowering the mass ratio of CNTs, and using CMC with small molecular weight.

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          Ultralight metallic microlattices.

          T. Schaedler, A. J. Jacobsen, A Torrents … (2011)
          Ultralight (<10 milligrams per cubic centimeter) cellular materials are desirable for thermal insulation; battery electrodes; catalyst supports; and acoustic, vibration, or shock energy damping. We present ultralight materials based on periodic hollow-tube microlattices. These materials are fabricated by starting with a template formed by self-propagating photopolymer waveguide prototyping, coating the template by electroless nickel plating, and subsequently etching away the template. The resulting metallic microlattices exhibit densities ρ ≥ 0.9 milligram per cubic centimeter, complete recovery after compression exceeding 50% strain, and energy absorption similar to elastomers. Young's modulus E scales with density as E ~ ρ(2), in contrast to the E ~ ρ(3) scaling observed for ultralight aerogels and carbon nanotube foams with stochastic architecture. We attribute these properties to structural hierarchy at the nanometer, micrometer, and millimeter scales.
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            Biomimetic superelastic graphene-based cellular monoliths.

            Ling Qiu, Jeffery Liu, Shery Chang … (2012)
            Many applications proposed for graphene require multiple sheets be assembled into a monolithic structure. The ability to maintain structural integrity upon large deformation is essential to ensure a macroscopic material which functions reliably. However, it has remained a great challenge to achieve high elasticity in three-dimensional graphene networks. Here we report that the marriage of graphene chemistry with ice physics can lead to the formation of ultralight and superelastic graphene-based cellular monoliths. Mimicking the hierarchical structure of natural cork, the resulting materials can sustain their structural integrity under a load of >50,000 times their own weight and can rapidly recover from >80% compression. The unique biomimetic hierarchical structure also provides this new class of elastomers with exceptionally high energy absorption capability and good electrical conductivity. The successful synthesis of such fascinating materials paves the way to explore the application of graphene in a self-supporting, structurally adaptive and 3D macroscopic form.
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              Multifunctional, ultra-flyweight, synergistically assembled carbon aerogels.

              Chao Gao, Haiyan Sun, Zhen Xu (2013)
              All carbon aerogels (up to 1000 cm(3)) with ultralow density (down to 0.16 mg cm(-3)) and temperature-invariant (-190-900 °C) super-elasticity are fabricated by facile assembling of commercial carbon nanotubes (CNTs) and chemically-converted giant graphene sheets, on the basis of the synergistic effect between elastic CNTs ribs and giant graphene cell walls. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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                Author and article information

                Contributors
                Michele Bacciocchi: Role: Academic Editor
                Journal
                Journal ID (nlm-ta): Materials (Basel)
                Journal ID (iso-abbrev): Materials (Basel)
                Journal ID (publisher-id): materials
                Title: Materials
                Publisher: MDPI
                ISSN (Electronic): 1996-1944
                Publication date (Electronic): 20 July 2021
                Publication date Collection: July 2021
                Volume: 14
                Issue: 14
                Electronic Location Identifier: 4059
                Affiliations
                Department of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan; matsushima.kazuki@ 123456e.mbox.nagoya-u.ac.jp (K.M.); ono.kenta@ 123456d.mbox.nagoya-u.ac.jp (K.O.); yanagi.reo@ 123456f.mbox.nagoya-u.ac.jp (R.Y.); shioura.naoto@ 123456j.mbox.nagoya-u.ac.jp (N.S.); segi.takahiro@ 123456h.mbox.nagoya-u.ac.jp (T.S.)
                Author notes
                Author information
                https://orcid.org/0000-0003-2811-335X
                https://orcid.org/0000-0002-5345-7958
                Article
                Publisher ID: materials-14-04059
                DOI: 10.3390/ma14144059
                PMC ID: 8306045
                PubMed ID: 34300978
                SO-VID: ff20e2aa-35cf-40e6-a354-47dccd47ffe1
                Copyright © © 2021 by the authors.
                License:

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( https://creativecommons.org/licenses/by/4.0/).

                History
                Date received : 22 June 2021
                Date accepted : 19 July 2021
                Categories
                Subject: Article

                Keywords: ultralight materials,carbon nanotubes,composites,elastic recovery properties
                Data availability:
                Keywords: ultralight materials, carbon nanotubes, composites, elastic recovery properties

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