Li Xiutao, Zhang Feng, Zhang Mengjie, Zhou Xiaomeng, Zhang Haijun
Key Laboratory of Civil Aviation Thermal Hazards Prevention and Emergency Response, Civil Aviation University of China, Tianjin 300300, China.
ACS Omega. 2021 Dec 16;6(51):35548-35558. doi: 10.1021/acsomega.1c05088. eCollection 2021 Dec 28.
In this work, a series of rare earth-based metal-organic frameworks (RE-MOFs) with the same organic ligand were synthesized and studied as flame retardants on epoxy. Through thermogravimetric analysis, limiting oxide index, UL-94, and cone calorimeter tests, a Y-based MOF (Y-MOF) showed the best flame retardancy compared with a La-based MOF (La-MOF) and Ce-based MOF (Ce-MOF). Further research with Raman, X-ray photoelectron spectroscopy, and theoretical calculation revealed that the reasons for the different flame retardance performances of RE-MOFs resulted from the catalytic carbonizing abilities and the radical-trapping abilities of La, Ce, and Y.
在本研究中，合成了一系列具有相同有机配体的稀土基金属有机框架材料（RE-MOFs），并将其作为环氧树脂的阻燃剂进行研究。通过热重分析、极限氧指数、UL-94和锥形量热仪测试，与镧基金属有机框架材料（La-MOF）和铈基金属有机框架材料（Ce-MOF）相比，钇基金属有机框架材料（Y-MOF）表现出最佳的阻燃性能。通过拉曼光谱、X射线光电子能谱和理论计算的进一步研究表明，RE-MOFs阻燃性能不同的原因在于镧、铈和钇的催化碳化能力和自由基捕获能力。
