Pyrolysed cork-geopolymer composites: A novel and sustainable EMI shielding building material
authors Novais, RM; Saeli, M; Caetano, APF; Seabra, MP; Labrincha, JA; Surendran, KP; Pullar, RC
nationality International
journal CONSTRUCTION AND BUILDING MATERIALS
author keywords Inorganic polymer; Construction; Microwave absorption; Cork; Composite
keywords BIOMASS FLY-ASH; CARBON FIBER/CEMENT COMPOSITES; WAVE ABSORPTION PROPERTIES; ABSORBING PROPERTIES; MORTARS; WASTE; DESIGN; PAPER; ECOCERAMICS; PERFORMANCE
abstract In this investigation, and for the first time, pyrolysed sustainable cork was used to produce waste-based geopolymer-cork composites with enhanced electromagnetic interference (EMI) shielding properties. The influence of the pyrolysed cork amount and the geopolymer porosity on the EMI shielding ability of the composites was studied. The maximum total shielding effectiveness (SET) values achieved by these novel building materials (-13.8 to -15.9 dB) are equal to any other reported geopolymer microwave (MW) absorbers over the X-band, despite containing much lower carbon content. In addition, our composites were produced using an industrial waste (biomass fly ash) as raw material and recycled wine stoppers as a carbon source (2.5-3.75 wt%). This strategy is different from those implemented in the only other reported MW absorbing geopolymers, which used standard commercial chemical precursors, and the added carbon component is also a non-renewable commercial product, added in much greater quantities (10x more). Therefore, our approach not only decreases the consumption of virgin raw materials (e.g. kaolin), but also enhances the global sustainability of the construction sector. (C) 2019 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0950-0618
year published 2019
volume 229
digital object identifier (doi) 10.1016/j.conbuildmat.2019.116930
web of science category Construction & Building Technology; Engineering, Civil; Materials Science, Multidisciplinary
subject category Construction & Building Technology; Engineering; Materials Science
unique article identifier WOS:000498306100080
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journal analysis (jcr 2017):
journal impact factor 3.485
5 year journal impact factor 4.039
category normalized journal impact factor percentile 83.796
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