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Fire-Retardant and Thermally Insulating Phenolic-Silica Aerogels
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 102018 (English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 57, no 17, p. 4538-4542Article in journal (Refereed) Published
Abstract [en]

Energy efficient buildings require materials with a low thermal conductivity and a high fire resistance. Traditional organic insulation materials are limited by their poor fire resistance and inorganic insulation materials are either brittle or display a high thermal conductivity. Herein we report a mechanically resilient organic/inorganic composite aerogel with a thermal conductivity significantly lower than expanded polystyrene and excellent fire resistance. Co-polymerization and nanoscale phase separation of the phenol-formaldehyde-resin (PFR) and silica generate a binary network with domain sizes below 20 nm. The PFR/SiO2 aerogel can resist a high-temperature flame without disintegration and prevents the temperature on the non-exposed side from increasing above the temperature critical for the collapse of reinforced concrete structures.

Place, publisher, year, edition, pages
2018. Vol. 57, no 17, p. 4538-4542
Keywords [en]
aerogels, binary networks, fire-retardants, phenol-formaldehyde resin, thermal insulation
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-155893DOI: 10.1002/anie.201711717ISI: 000430165700013PubMedID: 29469238OAI: oai:DiVA.org:su-155893DiVA, id: diva2:1202936
Available from: 2018-05-02 Created: 2018-05-02 Last updated: 2018-05-02Bibliographically approved

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Apostolopoulou-Kalkavoura, VarvaraBergström, Lennart
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