Highly stretchable and self-foaming polyurethane composite skeleton with thermally tunable microwave absorption properties.

Ye, F; He, X; Zheng, J; Li, Y; Li, M; Hu, Z; Wang, S; Tong, G; Li, X

Highly stretchable and self-foaming polyurethane composite skeleton with thermally tunable microwave absorption properties.

Ye, F He, X Zheng, J Li, Y

Li, M Hu, Z Wang, S Tong, G Li, X

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Publisher:: IOP PUBLISHING LTD
Publication Type:: Journal Article
Citation:: Nanotechnology, 2021, 32, (22)
Issue Date:: 2021-03-12

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Field	Value	Language
dc.contributor.author	Ye, F
dc.contributor.author	He, X
dc.contributor.author	Zheng, J
dc.contributor.author	Li, Y https://orcid.org/0000-0002-6720-8493
dc.contributor.author	Li, M
dc.contributor.author	Hu, Z
dc.contributor.author	Wang, S
dc.contributor.author	Tong, G
dc.contributor.author	Li, X
dc.date.accessioned	2022-06-10T02:59:14Z
dc.date.available	2021-02-25
dc.date.available	2022-06-10T02:59:14Z
dc.date.issued	2021-03-12
dc.identifier.citation	Nanotechnology, 2021, 32, (22)
dc.identifier.issn	0957-4484
dc.identifier.issn	1361-6528
dc.identifier.uri	http://hdl.handle.net/10453/158050
dc.description.abstract	Stretchable and lightweight polymer composite material possessing tunable microwave absorption (MA) properties under thermal radiations remain a significant challenge. Here, we proposed a facile strategy to fabricate stretchable, magnetic composite skeletons by incorporating the tadpole-like CNTs@Fe3O4nanoparticles into self-foaming polyurethane (PU) matrix and the electromagnetic responsive of CNTs@Fe3O4/PU composite foams with different CNTs contents under heating-cooling cycle in a temperature range of 253 -333 K were carefully investigated. Enhanced complex permittivity and shifting peak frequency were observed at elevated temperatures. For instance, the 70-CNTs@Fe3O4/PU sample with 15 wt% loading content at 333 K exhibits excellent MA properties including a minimum reflection loss (RLm) of -66.9 dB and ultrabroad effective frequency bandwidth (RL ≤ -20 dB) of 9.98 GHz at the thickness of 1.58-3.37 mm. Meanwhile, great recoverability in terms of RL-fprofile was achieved in the process of thermal cooling back to 253 K. Such adjustable MA property was attributed to the well-matched impedance and dramatic attenuation ability, benefiting from the temperature-dependant electrical conductivity, abundant interfacial polarization and interior microcellular structures. Besides, the rising temperature increased the sample elongation and electrical conductivity with a slight sacrifice of maximum tensile strength. This stretchable PU skeleton with a unique assembly of CNTs and Fe3O4nanoparticles are expected to be promising candidates as smart absorbers for application in the harsh environments.
dc.format	Electronic
dc.language	eng
dc.publisher	IOP PUBLISHING LTD
dc.relation.ispartof	Nanotechnology
dc.relation.isbasedon	10.1088/1361-6528/abe9e7
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Highly stretchable and self-foaming polyurethane composite skeleton with thermally tunable microwave absorption properties.
dc.type	Journal Article
utslib.citation.volume	32
utslib.location.activity	England
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2022-06-10T02:58:34Z
pubs.issue	22
pubs.publication-status	Published online
pubs.volume	32
utslib.citation.issue	22

Abstract:

Stretchable and lightweight polymer composite material possessing tunable microwave absorption (MA) properties under thermal radiations remain a significant challenge. Here, we proposed a facile strategy to fabricate stretchable, magnetic composite skeletons by incorporating the tadpole-like CNTs@Fe3O4nanoparticles into self-foaming polyurethane (PU) matrix and the electromagnetic responsive of CNTs@Fe3O4/PU composite foams with different CNTs contents under heating-cooling cycle in a temperature range of 253 -333 K were carefully investigated. Enhanced complex permittivity and shifting peak frequency were observed at elevated temperatures. For instance, the 70-CNTs@Fe3O4/PU sample with 15 wt% loading content at 333 K exhibits excellent MA properties including a minimum reflection loss (RLm) of -66.9 dB and ultrabroad effective frequency bandwidth (RL ≤ -20 dB) of 9.98 GHz at the thickness of 1.58-3.37 mm. Meanwhile, great recoverability in terms of RL-fprofile was achieved in the process of thermal cooling back to 253 K. Such adjustable MA property was attributed to the well-matched impedance and dramatic attenuation ability, benefiting from the temperature-dependant electrical conductivity, abundant interfacial polarization and interior microcellular structures. Besides, the rising temperature increased the sample elongation and electrical conductivity with a slight sacrifice of maximum tensile strength. This stretchable PU skeleton with a unique assembly of CNTs and Fe3O4nanoparticles are expected to be promising candidates as smart absorbers for application in the harsh environments.

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http://hdl.handle.net/10453/158050