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Article

Multifunctional Carbon-Based Hybrid Foams for Shape-Stabilization of Phase Change Materials, Thermal Energy Storage, and Electromagnetic Interference Shielding Functions

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Department of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece
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Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100, Vasilika, Vouton, GR-70013 Heraklion, Greece
*
Authors to whom correspondence should be addressed.
Academic Editor: Hiroshi Furuta
Micro 2022, 2(3), 390-409; https://doi.org/10.3390/micro2030026
Received: 13 May 2022 / Revised: 24 June 2022 / Accepted: 28 June 2022 / Published: 5 July 2022
Carbon-red mud foam/paraffin hybrid materials were prepared and studied for their thermal energy storage and electromagnetic interference (EMI) shielding properties. The host matrices were prepared utilizing the polymeric foam replication method, with a polyurethane sponge as a template, resin as a carbon source, and red mud as a filler. The paraffins, n-octadecane (OD) and the commercial RT18HC, were used as organic encapsulant phase change materials (PCMs) into the open pore structure of the foams. The foams’ morphological and structural study revealed a highly porous structure (bulk density, apparent porosity P > 65%), which exhibits elliptical and spherical pores, sized from 50 up to 500 μm, and cell walls composed of partially graphitized carbon and various oxide phases. The hybrid foams showed a remarkable encapsulation efficiency as shape stabilizers for paraffins: 48.8% (OD), 37.8% (RT18HC), while their melting enthalpies (ΔHm) were found to be 126.9 J/g and 115.5 J/g, respectively. The investigated hybrids showed efficient electromagnetic shielding performance in frequency range of 3.5–9.0 GHz reaching the entry-level value of ~20 dB required for commercial applications, when filled with PCMs. Their excellent thermal and EMI shielding performance places the as-prepared samples as promising candidates for use in thermal management and EMI shielding of electronic devices as well. View Full-Text
Keywords: carbon foams; thermal energy storage; red mud; porosity; EMI shielding; organic PCMs carbon foams; thermal energy storage; red mud; porosity; EMI shielding; organic PCMs
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MDPI and ACS Style

Gioti, C.; Karakassides, A.; Asimakopoulos, G.; Baikousi, M.; Salmas, C.E.; Viskadourakis, Z.; Kenanakis, G.; Karakassides, M.A. Multifunctional Carbon-Based Hybrid Foams for Shape-Stabilization of Phase Change Materials, Thermal Energy Storage, and Electromagnetic Interference Shielding Functions. Micro 2022, 2, 390-409. https://doi.org/10.3390/micro2030026

AMA Style

Gioti C, Karakassides A, Asimakopoulos G, Baikousi M, Salmas CE, Viskadourakis Z, Kenanakis G, Karakassides MA. Multifunctional Carbon-Based Hybrid Foams for Shape-Stabilization of Phase Change Materials, Thermal Energy Storage, and Electromagnetic Interference Shielding Functions. Micro. 2022; 2(3):390-409. https://doi.org/10.3390/micro2030026

Chicago/Turabian Style

Gioti, Christina, Anastasios Karakassides, Georgios Asimakopoulos, Maria Baikousi, Constantinos E. Salmas, Zacharias Viskadourakis, George Kenanakis, and Michael A. Karakassides. 2022. "Multifunctional Carbon-Based Hybrid Foams for Shape-Stabilization of Phase Change Materials, Thermal Energy Storage, and Electromagnetic Interference Shielding Functions" Micro 2, no. 3: 390-409. https://doi.org/10.3390/micro2030026

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