Multiple free-radical-trapping and hydrogen-bonding-enhanced polyurethane foams with long-lasting flame retardancy, aging resistance, and toughness

Flexible polyurethane foam (FPUF) is a ubiquitous material utilized in furniture cushions, mattresses, and various technical applications. Despite the widespread use, FPUF faces challenges in maintaining long-lasting flame retardancy and aging resistance, particularly in harsh environments, while re...

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Published inMaterials horizons Vol. 11; no. 18; pp. 4462 - 4471
Main Authors He, Lei, Chen, Ming-Jun, Zeng, Fu-Rong, Wang, Ting, Wei-Luo, Fang, Dan-Xuan, Guo, Shuai-Qi, Deng, Cong, Zhao, Hai-Bo, Wang, Yu-Zhong
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 16.09.2024
Subjects
Aging
Aging (materials)
Bonding strength
Chemical bonds
Cushions
Elongated structure
Fire resistance
Free radicals
Hydrogen bonding
Hydrogen bonds
Mechanical properties
Phosphorus
Plastic foam
Polyurethane foam
Tear strength
Tensile strength
Toughness
Trapping
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Summary:Flexible polyurethane foam (FPUF) is a ubiquitous material utilized in furniture cushions, mattresses, and various technical applications. Despite the widespread use, FPUF faces challenges in maintaining long-lasting flame retardancy and aging resistance, particularly in harsh environments, while retaining mechanical robustness. Here, we present a novel approach to address these issues by enhancing FPUF through multiple free-radical-trapping and hydrogen-bonding mechanisms. A hindered amine phosphorus-containing polyol (DTAP) was designed and chemically introduced into FPUF. The distinctive synergy between hindered amine and phosphorus-containing structures enables the formation of multiple hydrogen bonds with urethane, while also effectively capturing free radicals across a broad temperature spectrum. As a result, incorporating only 5.1 wt% of DTAP led to the material successfully passing vertical burning tests and witnessing notable enhancements in tensile strength, elongation at break, and tear strength. Even after enduring accelerated thermal aging for 168 hours, the foam maintained exceptional flame retardancy and mechanical properties. This study offers novel insights into material enhancement, simultaneously achieving outstanding long-lasting flame retardancy, toughness, and anti-aging performance.
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ISSN:2051-6347
2051-6355
2051-6355
DOI:10.1039/d4mh00607k