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Thermally insulatin...
Thermally insulating and fire-retardant lightweight anisotropic foams based on nanocellulose and graphene oxide
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- Wicklein, Bernd (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Kocjan, Andraz (author)
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- Salazar-Alvarez, German (author)
- KTH,Stockholms universitet,Institutionen för material- och miljökemi (MMK),Royal Institute of Technology, Sweden,Wallenberg Wood Science Center,Stockholm University, Sweden
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Carosio, Federico (author)
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Camino, Giovanni (author)
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Antonietti, Markus (author)
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- Bergström, Lennart (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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(creator_code:org_t)
- 2015
- 2015
- English.
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In: Nature Nanotechnology. - 1748-3387 .- 1748-3395. ; 10:3, s. 277-283
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- High-performance thermally insulating materials from renewable resources are needed to improve the energy efficiency of buildings. Traditional fossil-fuel-derived insulation materials such as expanded polystyrene and polyurethane have thermal conductivities that are too high for retrofitting or for building new, surface-efficient passive houses. Tailored materials such as aerogels and vacuum insulating panels are fragile and susceptible to perforation. Here, we show that freeze-casting suspensions of cellulose nanofibres, graphene oxide and sepiolite nanorods produces super-insulating, fire-retardant and strong anisotropic foams that perform better than traditional polymer-based insulating materials. The foams are ultralight, show excellent combustion resistance and exhibit a thermal conductivity of 15 mW m(-1) K-1, which is about half that of expanded polystyrene. At 30 degrees C and 85% relative humidity, the foams retained more than half of their initial strength. Our results show that nanoscale engineering is a promising strategy for producing foams with excellent properties using cellulose and other renewable nanosized fibrous materials.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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