Organic modification of MoSe₂ sheets is firstly achieved by Atherton–Todd reaction, aiming at the acquisition of multifunctional MoSe₂ 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 MoSe₂ 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 MoSe₂ sheets and evoke significant developments in its promising applications.

MoSe ₂片材的有机改性首先是通过Atherton-Todd反应实现的，旨在获得多功能的MoSe ₂杂化物。在这种杂化材料的存在下，热塑性聚氨酯（TPU）的防火安全性和机械性能得到了同时提高。功能化的MoSe ₂之间的强界面相互作用可以获得薄板和TPU，从而使从弱聚合物链到坚固薄板的载荷转移更加有效。此外，在聚合物基体中可以形成更连贯的屏障网络，从而抑制了分解碎片的扩散并减少了燃烧燃料的供应。因此，观察到聚合物复合材料的放热减少。值得注意的是，这种屏障网络也抑制了HCN和CO等有毒气体的释放，从而降低了火灾毒性。这项工作可能会为MoSe ₂薄板的功能化打开新的大门，并在其有前途的应用中引发重大的发展。