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Ecoefficiency of Thermal Insulation Sandwich Panels Based On Fly Ash Modified with Colloidal Mesoporous Silica
Umeå University, Faculty of Science and Technology, Department of Chemistry.
Umeå University, Faculty of Science and Technology, Department of Chemistry.
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2019 (English)In: ACS Sustainable Chemistry & Engineering, ISSN 2168-0485, Vol. 7, no 24, p. 20000-20012Article in journal (Refereed) Published
Abstract [en]

The current practice of landfilling fly ash generated by waste incineration is nonsustainable, so alternative ways of using this material are needed. Silanization effectively immobilizes the heavy metal contaminants in the incineration fly ash and enables its circular utilization because silanized fly ash (SFA) has market value as a low-cost filler for polymer composites. This study examines the ecoefficiency of a thermal insulation panel that consists of a polyurethane (PU) foam core sandwiched between two epoxy composite skins prepared by reinforcing glass fibers (GF) and SFA in epoxy resin. The ecoefficiency of such panels was evaluated by comparing their life cycle environmental externality costs (LCEE) to their life cycle costs (LCC). The LCEE was calculated by monetizing the panels' environmental impacts, which were quantified by performing a life cycle assessment (LCA). The results revealed that the ecoefficiency of the composite panels is positive (47%) and superior to that of market incumbent alternatives with PU foam or rockwool cores and steel skins. The two market incumbents have negative ecoefficiencies, primarily due to their high LCEE. The environmental performance of the panel with SFA GF epoxy composite skins can be further improved by using lignin-based epoxy resin or thermoplastic polypropylene as the polymer matrix of composite skins. Overall, application as a filler in fabricating polymer composite skins of sandwich panels is an upcycling pathway of SFA that combines circular economy prospects with sustainability benefits.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019. Vol. 7, no 24, p. 20000-20012
Keywords [en]
Ecoefficiency, Thermal insulation sandwich panels, Colloidal mesoporous silica, Municipal solid waste incineration fly ash, Life cycle assessment, Life cycle costing, Lignin-epoxy resin
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:umu:diva-167053DOI: 10.1021/acssuschemeng.9b05726ISI: 000503330400072OAI: oai:DiVA.org:umu-167053DiVA, id: diva2:1384094
Funder
Swedish Research Council Formas, 2016-20022Available from: 2020-01-09 Created: 2020-01-09 Last updated: 2020-01-09Bibliographically approved

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Shanmugam, KavithaJansson, StinaTysklind, MatsUpadhyayula, Venkata K.K.

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Shanmugam, KavithaJansson, StinaTysklind, MatsUpadhyayula, Venkata K.K.
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