Fire‐Retardant and Thermally Insulating Phenolic‐Silica Aerogels,Angewandte Chemie International Edition

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Fire‐Retardant and Thermally Insulating Phenolic‐Silica Aerogels
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-03-12 , DOI: 10.1002/anie.201711717
Zhi-Long Yu ₁ , Ning Yang ₁ , Varvara Apostolopoulou-Kalkavoura ₂ , Bing Qin ₁ , Zhi-Yuan Ma ₁ , Wei-Yi Xing ₃ , Chan Qiao ₁ , Lennart Bergström ₂ , Markus Antonietti ₄ , Shu-Hong Yu ₁

Affiliation

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.

中文翻译：

阻燃和隔热酚醛二氧化硅气凝胶

节能建筑需要导热系数低和耐火性高的材料。传统的有机绝缘材料由于其耐火性差而受到限制，而无机绝缘材料要么易碎，要么显示出高导热性。本文中，我们报告了一种机械弹性的有机/无机复合气凝胶，其热导率显着低于发泡聚苯乙烯，并具有出色的耐火性。酚醛树脂（PFR）和二氧化硅的共聚和纳米级相分离产生了域尺寸小于20 nm的二元网络。PFR / SiO ₂ 气凝胶可以抵抗高温火焰而不会崩解，并且可以防止未暴露侧的温度升高到高于钢筋混凝土结构坍塌的临界温度。

更新日期：2018-03-12

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