Wang Junling, Ma Chao, Mu Xiaowei, Cai Wei, Liu Longxiang, Zhou Xia, Hu Weizhao, Hu Yuan
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China.
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China.
J Hazard Mater. 2018 Jun 15;352:36-46. doi: 10.1016/j.jhazmat.2018.03.003. Epub 2018 Mar 8.
Organic modification of MoSe sheets is firstly achieved by Atherton-Todd reaction, aiming at the acquisition of multifunctional MoSe hybrid. Simultaneous enhancements in fire safety and mechanical property of thermalplastic polyurethane (TPU) are obtained with the presence of this hybrid. Strong interfacial interactions between the functionalized MoSe sheets and TPU can be obtained, making more efficient load transfer from the weak polymer chains to the robust sheets. Besides, more coherent barrier network may be formed in polymer matrix, restraining the diffusion of decomposed fragments and reducing the supply for combustion fuel. Consequently, the decreases in heat release are observed for polymer composites. Notably, the releases of toxic gases, such as HCN and CO, are also suppressed by this barrier network, resulting in the reductions in fire toxicity. This work may open a new door for the functionalization of MoSe sheets and evoke significant developments in its promising applications.
首先通过阿特金森-托德反应实现了对二硒化钼片层的有机改性，旨在获得多功能二硒化钼杂化物。这种杂化物的存在使热塑性聚氨酯（TPU）的防火安全性和机械性能同时得到提高。功能化的二硒化钼片层与TPU之间可形成强界面相互作用，从而使载荷从较弱的聚合物链更有效地转移到坚固的片层上。此外，聚合物基体中可能形成更连贯的阻隔网络，抑制分解碎片的扩散并减少燃烧燃料的供应。因此，观察到聚合物复合材料的热释放减少。值得注意的是，这种阻隔网络还抑制了有毒气体（如HCN和CO）的释放，从而降低了火灾毒性。这项工作可能为二硒化钼片层的功能化打开一扇新的大门，并在其有前景应用中引发重大进展。
