A biomimetic structured bio-based flame retardant coating on flexible polyurethane foam with low smoke release and antibacterial ability
作者：具有低發煙性和抗菌能力的軟質聚氨酯泡沫塑料仿生結構生物基阻燃涂層---孟丹
關鍵字：Bio-based coating，Flexible polyurethane foam，Fire safety，Antibacterial property
論文來源：期刊
發表時間：2022年
Flexible polyurethane foam (FPUF) is widely used in our life, but it is inherent flammable. The demand for environmental-friendly multi-functional FPUF has been increasing rapidly in the last decade. In this work, a novel bio-based flame retardant coating was constructed by chemically reacting sodium alginate (OSA) and polydopamine (PDA) on the FPUF, followed by depositing nanorod-like β-FeOOH molecules through complexation reaction to form a biomimetic structure. The limiting oxygen index of the coated FPUF samples reached 25.5%. The peak heat release rate was reduced by 45.0%, and the smoke density of the coated sample was decreased by 69.1% compared to that of the control FPUF sample. It was proposed that the OSA-PDA-β-FeOOH decomposed during combustion to promote the formation of compact crosslinked char and released inert gases to dilute the combustible gases, and the β-FeOOH transferred to Fe2O3 to settled the smoke particles reducing the smoke release. Furthermore, the coating with shark skin like structure endowed FPUF antibacterial ability because of its good superoleophobicity underwater. This work provided a novel strategy to construct a biomimetic multifunctional coating on the FPUF.
軟質聚氨酯泡沫塑料（FPUF）在我們的生活中應用廣泛，但它本身就具有易燃性。在過去十年中，對環保型多功能 FPUF 的需求一直在快速增長。在這項工作中，通過在 FPUF 上使海藻酸鈉 (OSA) 和聚多巴胺 (PDA) 發生化學反應，然后通過絡合反應沉積納米棒狀 β-FeOOH 分子形成仿生結構，構建了一種新型生物基阻燃涂層。涂層FPUF樣品的極限氧指數達到25.5%。與對照FPUF樣品相比，涂層樣品的峰值放熱率降低了45.0%，煙氣密度降低了69.1%。2 O 3沉降煙霧顆粒，減少煙霧釋放。此外，具有鯊魚皮結構的涂層由于其良好的水下超疏油性而賦予了FPUF抗菌能力。這項工作提供了一種在 FPUF 上構建仿生多功能涂層的新策略。