Core-shell engineered boehmite-derived organic-inorganic hybrid flame retardant for epoxy resins: synergistically enhanced fire safety and mechanical integrity

IF 6.3 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-04-04 DOI:10.1016/j.polymdegradstab.2025.111367

Shu-Gen Wu, Chuan Liu, Zhen Qin, Dong-Yi He, Ze-Kun Wang, Wen-long Xie, Yu-Zhong Wang, Li Chen

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引用次数: 0

Abstract

Conventional phosphorus-containing flame retardants often compromise the mechanical integrity of epoxy resins (EP), presenting a critical challenge for high-performance applications. This study addresses this dilemma through an innovative interfacial engineering approach, developing a core-shell structured organic-inorganic hybrid aluminum phenylphosphinate (PADP@BM) via chemical modification of boehmite nanoparticles with phenylphosphinic acid. Structural characterization validated the successful anchoring of BM nanoparticles onto PADP microrods, forming a unique organic-inorganic heterostructure. With only 10 wt% loading, the EP composite achieved a UL-94 V-0 rating and a remarkably high LOI value up to 37.0 %, while exhibiting 39.9 % and 31.5 % reductions in the peak heat release rate (PHRR) and total heat release (THR), respectively. Remarkably, the impact strength of EP/5PADP@BM increased by 43.4 % to 17.5 kJ/m², and the composites retained comparable strength and toughness to pure EP even in the face of a high loading of 10 wt% PADP@BM. This work provides a paradigm-shifting strategy to reconcile the long-standing conflict between flame retardancy and mechanical robustness in polymer composites.

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核壳工程薄铝石衍生的环氧树脂有机无机杂化阻燃剂：协同增强防火安全性和机械完整性

传统的含磷阻燃剂通常会损害环氧树脂（EP）的机械完整性，这对高性能应用提出了严峻的挑战。本研究通过创新的界面工程方法解决了这一难题，通过用苯基膦酸对薄水铝石纳米颗粒进行化学改性，开发了一种核壳结构的有机-无机杂化苯膦酸铝（PADP@BM）。结构表征验证了BM纳米颗粒成功锚定在PADP微棒上，形成了独特的有机-无机异质结构。在负荷仅为10 wt%的情况下，EP复合材料达到了UL-94 V-0额定值，LOI值高达37.0%，同时峰值放热率（PHRR）和总放热率（THR）分别降低了39.9%和31.5%。值得注意的是，EP/5PADP@BM的冲击强度提高了43.4%，达到17.5 kJ/m2，即使面对10 wt% PADP@BM的高载荷，复合材料也保持了与纯EP相当的强度和韧性。这项工作提供了一种范式转换策略，以调和聚合物复合材料中阻燃性和机械稳健性之间长期存在的冲突。

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.