On the Synergistic Effect of Multi-Walled Carbon Nanotubes and Graphene Nanoplatelets to Enhance the Functional Properties of SLS 3D-Printed Elastomeric Structures
| Autor: | Polina Kuzhir, Hesheng Xia, Luigi Ambrosio, Dzmitry Bychanok, Pierfrancesco Cerruti, Alfredo Ronca, Gleb Gorokhov, Marino Lavorgna, Xin Peng Gan, Gennaro Rollo, Guoxia Fei |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics Nanoparticle thermoplastic polyurethane (TPU) 02 engineering and technology Carbon nanotube 010402 general chemistry Elastomer 01 natural sciences Article law.invention lcsh:QD241-441 Thermoplastic polyurethane lcsh:Organic chemistry law selective laser sintering Composite material piezoresistivity carbonaceous filler EMI shielding Porosity Graphene General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Selective laser sintering Gauge factor 0210 nano-technology |
| Zdroj: | Polymers, Basel : MDPI, 2020, vol. 12, iss. 8, art. no. 1841, p. [1-18] Polymers (Basel) 12 (2020). doi:10.3390/POLYM12081841 info:cnr-pdr/source/autori:Rollo, Gennaro; Ronca, Alfredo; Cerruti, Pierfrancesco; Gan, Xin Peng; Fei, Guoxia; Xia, Hesheng; Gorokhov, Gleb; Bychanok, Dzmitry; Kuzhir, Polina; Lavorgna, Marino; Ambrosio, Luigi/titolo:On the synergistic effect of multi-walled carbon nanotubes and graphene nanoplatelets to enhance the functional properties of SLS 3D-printed elastomeric structures/doi:10.3390%2FPOLYM12081841/rivista:Polymers (Basel)/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume:12 Polymers Volume 12 Issue 8 Polymers, Vol 12, Iss 1841, p 1841 (2020) |
| ISSN: | 2073-4360 |
| DOI: | 10.3390/polym12081841 |
| Popis: | Elastomer-based porous structures realized by selective laser sintering (SLS) are emerging as a new class of attractive multifunctional materials. Herein, a thermoplastic polyurethane (TPU) powder for SLS was modified by 1 wt.% multi-walled carbon nanotube (MWCNTs) or a mixture of MWCNTs and graphene (GE) nanoparticles (70/30 wt/wt) in order to investigate on both the synergistic effect provided by the two conductive nanostructured carbonaceous fillers and the correlation between formulation, morphology, and final properties of SLS printed porous structures. In detail, porous structures with a porosity ranging from 20% to 60% were designed using Diamond (D) and Gyroid (G) unit cells. Results showed that the carbonaceous fillers improve the thermal stability of the elastomeric matrix. Furthermore, the TPU/1 wt.% MWCNTs-GE-based porous structures exhibit excellent electrical conductivity and mechanical strength. In particular, all porous structures exhibit a robust negative piezoresistive behavior, as demonstrated from the gauge factor (GF) values that reach values of about &minus 13 at 8% strain. Furthermore, the G20 porous structures (20% of porosity) exhibit microwave absorption coefficients ranging from 0.70 to 0.91 in the 12&ndash 18 GHz region and close to 1 at THz frequencies (300 GHz&ndash 1 THz). Results show that the simultaneous presence of MWCNTs and GE brings a significant enhancement of specific functional properties of the porous structures, which are proposed as potential actuators with relevant electro-magnetic interference (EMI) shielding properties. |
| Databáze: | OpenAIRE |
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