阻燃剂
材料科学
热稳定性
环氧树脂
咪唑酯
可可
层状双氢氧化物
复合材料
沸石咪唑盐骨架
化学工程
吸附
金属有机骨架
氢氧化物
化学
有机化学
工程类
人工智能
计算机科学
作者
Kunpeng Song,Xueli Li,Ye‐Tang Pan,Boyou Hou,Zeeshan Ur Rehman,Jiyu He,Rongjie Yang
标识
DOI:10.1016/j.polymdegradstab.2023.110318
摘要
The machining of metal-organic frameworks (MOFs) based templates into diverse layered double hydroxides (LDHs) is essential to maximize their advantages in flame retardant polymers. However, improving the thermal stability of LDHs has so far continued to be a great challenge. Herein, a MOFs sacrificial template has been developed to realize the controlled synthesis of two Co-based isomers, namely CoCo-LDH and cobalt basic carbonate (CBC), with the construction of three different nanostructures of carbonate intercalated CoCo-LDH nanocage (LDH), single yolk@shell CBC@CoCo-LDH (s-CBC@LDH), and multi-yolk@shell CBC@CoCo-LDH (m-CBC@LDH). The thermal stability of CoCo-LDH is enhanced by controlling the reaction time. Moreover, CoCo-LDH from m-CBC@LDH decomposes at the right temperature while CBC nanoparticles further enhanced the flame retardancy. To demonstrate the high performance conjecture on the structure-property relationship, the as-synthesized Co-based isomers were individually integrated into the epoxy matrix to evaluate its comprehensive properties. Compared to LDH and s-CBC@LDH, m-CBC@LDH imparts superior thermal stability, flame retardancy, and comparable mechanical properties onto the epoxy composites. With the incorporation of 2 wt.% m-CBC@LDH, the peak of heat release rate and total heat release are decreased by 38.5% and 19.6%, respectively. This work provides a design direction for improving the flame retardant of epoxy resin.
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