Enhancing flame retardancy of flexible polyurethane foams through one-step coassembled nanocoatings

IF 23.2 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Advanced Composites and Hybrid Materials Pub Date : 2024-11-07 DOI:10.1007/s42114-024-01024-z

Dongqiao Zhang, Jingjing Liu, Brandon L. Williams, Zaili Hou, Josh N. Bodin, Benjamin J. Lofink, Victor H. Santos, Elaina M. Becher, Saral B. Shrestha, Zain Nasir, Harsh Patel, Anthony Partyka, Xiaohong Peng, Luyi Sun

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Abstract

Scalable and durable flame retardant nanocoatings were prepared through a fast, one-step coassembly process and applied to flexible polyurethane (PU) foams. The coated PU foams exhibited excellent performance, remaining highly flame retardant even after 1000 compression test cycles. The effect of the ratio of montmorillonite (MMT) to polyacrylic acid (PAA) on flame retardancy and compressive characteristics was systematically explored. The samples coated with only MMT and ammonium dihydrogen phosphate (ADP) displayed the weakest resilience and the greatest weight loss in the cyclic compression test. However, a higher content of MMT in the coatings could enhance the flame retardancy and thermal stability of the coated PU foams. Although PAA might not directly contribute to the flame retardancy of PU foams, it plays a key role in maintaining the robustness and resilience of the coating layer during multiple cycles of compression. Our research offers an effective method for producing scalable, durable, and robust flame retardant nanocoatings through a one-step process, suitable for PU foams and potentially many other substrates.

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通过一步法共聚纳米涂层提高柔性聚氨酯泡沫的阻燃性能

通过快速、一步式共组装工艺制备了可扩展的耐用阻燃纳米涂层，并将其应用于柔性聚氨酯（PU）泡沫。涂层聚氨酯泡沫表现出卓越的性能，即使在经过 1000 次压缩测试循环后仍具有很高的阻燃性。研究人员系统地探讨了蒙脱石（MMT）与聚丙烯酸（PAA）的比例对阻燃性和压缩特性的影响。在循环压缩试验中，仅涂覆了 MMT 和磷酸二氢铵（ADP）的样品显示出最弱的回弹性和最大的重量损失。不过，涂料中 MMT 的含量越高，涂覆聚氨酯泡沫的阻燃性和热稳定性就越好。虽然 PAA 可能不会直接提高聚氨酯泡沫的阻燃性，但它在多次循环压缩过程中对保持涂层的坚固性和回弹性起着关键作用。我们的研究提供了一种有效的方法，可通过一步法工艺生产可扩展、耐用且坚固的阻燃纳米涂层，适用于聚氨酯泡沫，也可能适用于许多其他基材。

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.