Home-structure fires account for 77% of fire deaths and result in more than US$7·7 billion in property damage every year. Wood is a major component in home construction and decoration due to its mechanical properties, aesthetic appeal and renewability, but its inherent flammability poses an ongoing risk. Layer-by-layer-assembled nanocoatings are effective for improving the fire safety of a variety of substrates, but the heterogeneous nature of wood’s surface complicates this aqueous multilayer process. Two different surface treatments, carboxylation and an alkaline wash, are studied here to increase the surface charge of wood and improve the deposition of nanobrick walls composed of renewable chitosan (CH) and vermiculite (VMT) clay. These treatments improve the penetration and performance of these nanocoatings on wood. Wood pretreated with an alkaline wash and coated with just two CH/VMT bilayers exhibits a time to ignition double that of the uncoated wood. This aqueous surface treatment provides a unique opportunity to improve the safety of wood construction.

中文翻译：

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用于木材防火的可再生纳米砖墙壁涂料

房屋火灾占死亡人数的77％，每年造成的财产损失超过7·70亿美元。木材由于其机械性能，美观性和可再生性而成为家庭建筑和装饰中的主要成分，但其​​固有的易燃性带来了持续的风险。逐层组装的纳米涂料可有效提高各种基材的防火安全性，但是木材表面的异质性使这种水性多层工艺变得复杂。本文研究了两种不同的表面处理，即羧化和碱洗，以增加木材的表面电荷并改善由可再生壳聚糖（CH）和ver石（VMT）粘土组成的纳米砖壁的沉积。这些处理提高了这些纳米涂层在木材上的渗透性和性能。经过碱洗和仅涂有两个CH / VMT双层涂层的木材，其点燃时间是未涂层木材的两倍。这种水性表面处理为提高木结构安全性提供了独特的机会。