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3D Shapeable, Superior Electrically Conductive Cellulose Nanofibers/Ti(3)C(2)T(x) MXene Aerogels/Epoxy Nanocomposites for Promising EMI Shielding

In this work, 3D highly electrically conductive cellulose nanofibers (CNF)/Ti(3)C(2)T(x) MXene aerogels (CTA) with aligned porous structures are fabricated by directional freezing followed by freeze-drying technique, and the thermally annealed CTA (TCTA)/epoxy nanocomposites are then fabricated by t...

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Detalles Bibliográficos
Autores principales: Wang, Lei, Song, Ping, Lin, Cheng-Te, Kong, Jie, Gu, Junwei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: AAAS 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7317662/
https://www.ncbi.nlm.nih.gov/pubmed/32613198
http://dx.doi.org/10.34133/2020/4093732
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author Wang, Lei
Song, Ping
Lin, Cheng-Te
Kong, Jie
Gu, Junwei
author_facet Wang, Lei
Song, Ping
Lin, Cheng-Te
Kong, Jie
Gu, Junwei
author_sort Wang, Lei
collection PubMed
description In this work, 3D highly electrically conductive cellulose nanofibers (CNF)/Ti(3)C(2)T(x) MXene aerogels (CTA) with aligned porous structures are fabricated by directional freezing followed by freeze-drying technique, and the thermally annealed CTA (TCTA)/epoxy nanocomposites are then fabricated by thermal annealing of CTA, subsequent vacuum-assisted impregnation and curing method. Results show that TCTA/epoxy nanocomposites possess 3D highly conductive networks with ultralow percolation threshold of 0.20 vol% Ti(3)C(2)T(x). When the volume fraction of Ti(3)C(2)T(x) is 1.38 vol%, the electrical conductivity (σ), electromagnetic interference shielding effectiveness (EMI SE), and SE divided by thickness (SE/d) values of the TCTA/epoxy nanocomposites reach 1672 S m(−1), 74 dB, and 37 dB mm(−1), respectively, which are almost the highest values compared to those of polymer nanocomposites reported previously at the same filler content. In addition, compared to those of the samples without Ti(3)C(2)T(x), the storage modulus and heat-resistance index of TCTA/epoxy nanocomposites are enhanced to 9792.5 MPa and 310.7°C, increased by 62% and 6.9°C, respectively, presenting outstanding mechanical properties and thermal stabilities. The fabricated lightweight, easy-to-process, and shapeable TCTA/epoxy nanocomposites with superior EMI SE values, excellent mechanical properties, and thermal stabilities greatly broaden the applications of MXene-based polymer composites in the field of EMI shielding.
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spelling pubmed-73176622020-06-30 3D Shapeable, Superior Electrically Conductive Cellulose Nanofibers/Ti(3)C(2)T(x) MXene Aerogels/Epoxy Nanocomposites for Promising EMI Shielding Wang, Lei Song, Ping Lin, Cheng-Te Kong, Jie Gu, Junwei Research (Wash D C) Research Article In this work, 3D highly electrically conductive cellulose nanofibers (CNF)/Ti(3)C(2)T(x) MXene aerogels (CTA) with aligned porous structures are fabricated by directional freezing followed by freeze-drying technique, and the thermally annealed CTA (TCTA)/epoxy nanocomposites are then fabricated by thermal annealing of CTA, subsequent vacuum-assisted impregnation and curing method. Results show that TCTA/epoxy nanocomposites possess 3D highly conductive networks with ultralow percolation threshold of 0.20 vol% Ti(3)C(2)T(x). When the volume fraction of Ti(3)C(2)T(x) is 1.38 vol%, the electrical conductivity (σ), electromagnetic interference shielding effectiveness (EMI SE), and SE divided by thickness (SE/d) values of the TCTA/epoxy nanocomposites reach 1672 S m(−1), 74 dB, and 37 dB mm(−1), respectively, which are almost the highest values compared to those of polymer nanocomposites reported previously at the same filler content. In addition, compared to those of the samples without Ti(3)C(2)T(x), the storage modulus and heat-resistance index of TCTA/epoxy nanocomposites are enhanced to 9792.5 MPa and 310.7°C, increased by 62% and 6.9°C, respectively, presenting outstanding mechanical properties and thermal stabilities. The fabricated lightweight, easy-to-process, and shapeable TCTA/epoxy nanocomposites with superior EMI SE values, excellent mechanical properties, and thermal stabilities greatly broaden the applications of MXene-based polymer composites in the field of EMI shielding. AAAS 2020-06-17 /pmc/articles/PMC7317662/ /pubmed/32613198 http://dx.doi.org/10.34133/2020/4093732 Text en Copyright © 2020 Lei Wang et al. http://creativecommons.org/licenses/by/4.0/ Exclusive Licensee Science and Technology Review Publishing House. Distributed under a Creative Commons Attribution License (CC BY 4.0).
spellingShingle Research Article
Wang, Lei
Song, Ping
Lin, Cheng-Te
Kong, Jie
Gu, Junwei
3D Shapeable, Superior Electrically Conductive Cellulose Nanofibers/Ti(3)C(2)T(x) MXene Aerogels/Epoxy Nanocomposites for Promising EMI Shielding
title 3D Shapeable, Superior Electrically Conductive Cellulose Nanofibers/Ti(3)C(2)T(x) MXene Aerogels/Epoxy Nanocomposites for Promising EMI Shielding
title_full 3D Shapeable, Superior Electrically Conductive Cellulose Nanofibers/Ti(3)C(2)T(x) MXene Aerogels/Epoxy Nanocomposites for Promising EMI Shielding
title_fullStr 3D Shapeable, Superior Electrically Conductive Cellulose Nanofibers/Ti(3)C(2)T(x) MXene Aerogels/Epoxy Nanocomposites for Promising EMI Shielding
title_full_unstemmed 3D Shapeable, Superior Electrically Conductive Cellulose Nanofibers/Ti(3)C(2)T(x) MXene Aerogels/Epoxy Nanocomposites for Promising EMI Shielding
title_short 3D Shapeable, Superior Electrically Conductive Cellulose Nanofibers/Ti(3)C(2)T(x) MXene Aerogels/Epoxy Nanocomposites for Promising EMI Shielding
title_sort 3d shapeable, superior electrically conductive cellulose nanofibers/ti(3)c(2)t(x) mxene aerogels/epoxy nanocomposites for promising emi shielding
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7317662/
https://www.ncbi.nlm.nih.gov/pubmed/32613198
http://dx.doi.org/10.34133/2020/4093732
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