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Bio-inspired adenosine triphosphate-modified h-BN-based coral-like CuAl-LDH nanosheets as a functional green flame retardant to improve the fire safety of epoxy resins via catalyzing intumescent char formation
Progress in Organic Coatings ( IF 6.5 ) Pub Date : 2023-05-05 , DOI: 10.1016/j.porgcoat.2023.107648
Zhengwei Yang , Guoqing Xiao , Chunlin Chen , Chunyan Chen , Fei Zhong , Min Cao , Mingtan Wang , Rui Zou , Ruili Li , Yuanyuan Li

High flammability and fire toxicity are the biggest hindrances to further applications of epoxy resins (EP). In this work, we designed a novel “integrated” green intumescent flame retardant via bio-inspired adenosine triphosphate modification of h-BN-anchored coral-like CuAl-LDH nanosheets (mBN@LDH@PATP). Then, the mBN@LDH@PATP was used as a filler to improve the fire safety of EP. Specifically, the anisotropic heat transfer mode of h-BN can effectively promote the longitudinal barrier and lateral diffusion of heat. The coral-like CuAl-LDH can successfully promote the catalytic carbonization of pyrolytic volatiles and their adsorption. Furthermore, adenosine triphosphate (ATP) synergistically interacts with h-BN and CuAl-LDH to impart a high heat-stable intumescent char network to EP. As expected, mBN@LDH@PATP significantly improved the flame retardancy and smoke suppression of the EP nanocomposites. Compared with the control EP, the prepared mBN@LDH@PATP/EP showed a 43.3 %, 40.8 %, 36.5 % and 39.1 % decrease in PHRR, THR, PSPR and TSP, respectively. In addition, CO and CO2 yield were significantly reduced by 53.5 % and 57.5 %, while LOI (32.9 %) and UL-94 (V-0) were significantly improved. The enhanced fire safety of EP nanocomposites was confirmed by adequate characterization. This research offers a workable way to achieve efficient and environmentally friendly flame retardant polymers.



中文翻译:

仿生三磷酸腺苷修饰的 h-BN 基珊瑚状 CuAl-LDH 纳米片作为功能性绿色阻燃剂,通过催化膨胀炭形成提高环氧树脂的防火安全性

高可燃性和火灾毒性是环氧树脂(EP)进一步应用的最大障碍。在这项工作中,我们设计了一种新型“集成”绿色膨胀型阻燃剂,通过对 h-BN 锚定珊瑚状 CuAl-LDH 纳米片 (mBN@LDH@PATP) 的仿生三磷酸腺苷改性。然后,将 mBN@LDH@PATP 用作填料以提高 EP 的防火安全性。具体来说,h-BN的各向异性传热方式可以有效促进热的纵向势垒和横向扩散。珊瑚状 CuAl-LDH 可以成功促进催化热解挥发物的碳化及其吸附。此外,三磷酸腺苷 (ATP) 与 h-BN 和 CuAl-LDH 协同相互作用,为 EP 赋予高热稳定性膨胀型炭网络。正如预期的那样,mBN@LDH@PATP 显着提高了 EP 纳米复合材料的阻燃性和抑烟性。与对照 EP 相比,制备的 mBN@LDH@PATP/EP 的 PHRR、THR、PSPR 和 TSP 分别降低了 43.3%、40.8%、36.5% 和 39.1%。此外,CO 和 CO2收率显着降低 53.5% 和 57.5%,而 LOI (32.9%) 和 UL-94 (V-0) 显着提高。EP 纳米复合材料增强的防火安全性已通过充分的表征得到证实。该研究为获得高效环保的阻燃聚合物提供了一种可行的方法。

更新日期:2023-05-05
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