Fire-Retardant and Thermally Insulating Phenolic-Silica Aerogels

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.

Yang, Ning (author)
Apostolopoulou-Kalkavoura, VarvaraStockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)vapos (author)
Qin, Bing (author)
Ma, Zhi-Yuan (author)
Xing, Wei-Yi (author)
Qiao, Chan (author)
Bergström, LennartStockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)lenbe (author)
Antonietti, Markus (author)
Yu, Shu-Hong (author)
Stockholms universitetInstitutionen för material- och miljökemi (MMK) (creator_code:org_t)

In:Angewandte Chemie International Edition: Wiley57:17, s. 4538-45421433-78511521-3773

By the author/editor: Yu, Zhi-Long; Yang, Ning; Apostolopoulou-K ...; Qin, Bing; Ma, Zhi-Yuan; Xing, Wei-Yi; show more...; Qiao, Chan; Bergström, Lenna ...; Antonietti, Mark ...; Yu, Shu-Hong; show less...

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