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- W1999822975 abstract "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 °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." @default.
- W1999822975 created "2016-06-24" @default.
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- W1999822975 date "2014-11-02" @default.
- W1999822975 modified "2023-10-15" @default.
- W1999822975 title "Thermally insulating and fire-retardant lightweight anisotropic foams based on nanocellulose and graphene oxide" @default.
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- W1999822975 doi "https://doi.org/10.1038/nnano.2014.248" @default.
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