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Ionic liquid-based monolithic porous polymers as efficient flame retardant and thermal insulation materials
Polymer ( IF 4.1 ) Pub Date : 2019-10-29 , DOI: 10.1016/j.polymer.2019.121947
Zhaoqi Zhu , Huijuan Wei , Fei Wang , Hanxue Sun , Weidong Liang , An Li

It remains very challenging to create porous materials with both good thermal insulation and flame retardancy for construction of energy-saving buildings. Herein, we report the first example of ionic liquid (IL)-based monolithic porous polymers as efficient flame retardant with good thermal insulation, which was synthesized by polymerization of vinyl tetrafluoroborate ionic liquid monomers with polydivinylbenzene (PDVB) as a crosslinker through a facile solvothermal synthesis followed by freeze drying (named as PDVB-BF4ILs). The PDVB-BF4ILs is mainly composed of mesopores with a pore sizes ranging from 8.8 to 20.3 nm. The PDVB-BF4ILs has a decomposition temperature of higher than 320 °C. The PDVB-BF4ILs show high thermal insulation with a low thermal conductivity (0.019W m−1 k−1) in air. Also, the PDVB-BF4ILs possesses excellent flame retardancy with a low peak heat released rate (139.3W g−1). Compared with porous PDVB, the pHRR of PDVB-BF4ILs was reduced by approximately 75%. Torch burn test implies that the PDVB-BF4ILs shows self-extinguishing behavior without generation of any melt dripping, indicating an excellent flame retardancy. Taking advantages of simple fabrication process, easily to be scaled-up, excellent thermal insulation and flame retardancy, such IL-based monolithic porous polymers may have great potential for real applications.



中文翻译:

离子液体基整体多孔聚合物作为高效的阻燃和隔热材料

制造具有良好的隔热性和阻燃性的多孔材料用于节能建筑的建造仍然是非常具有挑战性的。本文中,我们报告了离子液体(IL)基整体多孔聚合物作为具有良好隔热性能的高效阻燃剂的第一个实例,该合成方法是通过将四氟硼酸乙烯基离子液体单体与聚二乙烯基苯(PDVB)作为交联剂,通过方便的溶剂热聚合而合成的合成,然后冷冻干燥(命名为PDVB-BF 4 ILs)。PDVB-BF 4 ILs主要由中孔组成,孔径在8.8至20.3 nm之间。PDVB-BF 4 IL的分解温度高于320°C。PDVB-BF 4IL在空气中显示出高的隔热性和低的热导率(0.019W m -1 k -1)。另外,PDVB-BF 4 IL具有优异的阻燃性,并且峰值放热率较低(139.3W g -1)。与多孔PDVB相比,PDVB-BF 4 ILs的pHRR降低了约75%。火炬燃烧测试表明,PDVB-BF 4 ILs表现出自熄性,没有任何熔体滴落,表明具有极好的阻燃性。利用简单的制造工艺,易于放大,出色的隔热性和阻燃性等优点,此类基于IL的整体多孔聚合物在实际应用中可能具有巨大的潜力。

更新日期:2019-10-29
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