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Elastic Aerogels of Cellulose Nanofibers@Metal–Organic Frameworks for Thermal Insulation and Fire Retardancy
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.ORCID iD: 0000-0003-1032-6314
Stockholm University.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.ORCID iD: 0000-0002-0491-1077
Stockholm University.
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2020 (English)In: Nano-Micro Letters, ISSN 2150-5551, Vol. 12, no 9, article id 9Article in journal (Refereed) Published
Abstract [en]

Metal–organic frameworks (MOFs) with high microporosity and relatively high thermal stability are potential thermal insulation and flame-retardant materials. However, the difficulties in processing and shaping MOFs have largely hampered their applications in these areas. This study outlines the fabrication of hybrid CNF@MOF aerogels by a stepwise assembly approach involving the coating and cross-linking of cellulose nanofibers (CNFs) with continuous nanolayers of MOFs. The cross-linking gives the aerogels high mechanical strength but superelasticity (80% maximum recoverable strain, high specific compression modulus of ~ 200 MPa cm3 g−1, and specific stress of ~ 100 MPa cm3 g−1).The resultant lightweight aerogels have a cellular network structure and hierarchical porosity, which render the aerogels with relatively low thermal conductivity of ~ 40 mW m−1 K−1. The hydrophobic, thermally stable MOF nanolayers wrapped around the CNFs result in good moisture resistance and fire retardancy. This study demonstrates that MOFs can be used as efficient thermal insulation and flame-retardant materials. It presents a pathway for the design of thermally insulating, superelastic fire-retardant nanocomposites based on MOFs and nanocellulose.

Place, publisher, year, edition, pages
2020. Vol. 12, no 9, article id 9
Keywords [en]
Metal-organic frameworks, Nanocellulose, Superelastic aerogel, Thermal insulation, Fire retardancy
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
URN: urn:nbn:se:uu:diva-400386DOI: 10.1007/s40820-019-0343-4ISI: 000510847500009OAI: oai:DiVA.org:uu-400386DiVA, id: diva2:1381119
Funder
ÅForsk (Ångpanneföreningen's Foundation for Research and Development), 19-493Available from: 2019-12-20 Created: 2019-12-20 Last updated: 2020-03-20Bibliographically approved

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Zhou, ShengyangTavares da Costa, Marcus ViniciusStrömme, MariaXu, Chao
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