Abidnejad Roozbeh, Robertson Daria, Khakalo Alexey, Gholami Haghighi Fard Morteza, Seppälä Ari, Pasquier Eva, Tardy Blaise L, Mattos Bruno D, Rojas Orlando J
Department of Bioproducts and Biosystems, Aalto University School of Chemical Engineering, Espoo, Finland.
VTT Technical Research Centre of Finland, Espoo, Finland.
Carbohydr Polym. 2024 Dec 15;346:122646. doi: 10.1016/j.carbpol.2024.122646. Epub 2024 Aug 22.
Lightweight, energy-efficient materials in building construction typically include polymeric and composite foams. However, these materials pose significant fire hazards due to their high combustibility and toxic gas emissions, including carbon monoxide and hydrogen cyanide. This study delves into the latter aspects by comparing hybrid systems based on nanofiber-reinforced silica-based Pickering foams with a synthetic reference (polyurethane foams). The extent and dynamics of fire retardancy and toxic gas evolution were assessed, and the results revealed the benefits of combining the thermal insulation of silica with the structural strength of biobased nanofibers, the latter of which included anionic and phosphorylated cellulose as well as chitin nanofibers. We demonstrate that the nanofiber-reinforced silica-based Pickering foams are thermal insulative and provide both fire safety and energy efficiency. The results set the basis for the practical design of hybrid foams to advance environmental sustainability goals by reducing energy consumption in built environments.
建筑施工中的轻质、节能材料通常包括聚合物泡沫和复合泡沫。然而，这些材料因其高可燃性和有毒气体排放（包括一氧化碳和氰化氢）而构成重大火灾隐患。本研究通过将基于纳米纤维增强二氧化硅基皮克林泡沫的混合系统与合成参考材料（聚氨酯泡沫）进行比较，深入探讨了后述方面。评估了阻燃性和有毒气体释放的程度及动态变化，结果揭示了将二氧化硅的隔热性能与生物基纳米纤维的结构强度相结合的益处，其中生物基纳米纤维包括阴离子和磷酸化纤维素以及几丁质纳米纤维。我们证明，纳米纤维增强二氧化硅基皮克林泡沫具有隔热性能，兼具消防安全和能源效率。这些结果为混合泡沫的实际设计奠定了基础，通过减少建筑环境中的能源消耗来推进环境可持续性目标。
