Abstract
? 2022 Elsevier B.V.The black phosphorus (BP) was coordinated with molybdenum diboride (MoB2) for achieving excellent flame retardancy. The BP-MoB2 nanohybrids was fabricated by ball milling to improve the dispersion state of BP and MoB2 in graphene oxide (GO), where the BP was coordinate with MoB2 via P-Mo bonds. Based on density functional theory (DFT) calculations, the adsorption energy between BP and MoB2 is ? 1.01 eV, which suggests there exists a strong mutual adsorption. With the incorporation of 15 wt% BP-MoB2 into GO matrix, compared with neat GO, 60.28 % reduction in peak heat release rate (PHRR) was achieved. The addition of 20 wt% BP- MoB2 results in a maximum decrease of 75.00 % in total heat release (THR). TG-IR results demonstrated that the addition of 20 % BP-MoB2 into GO significantly reduces the decomposition of GO. Meanwhile, the GO/BP-MoB2 5 nanocomposites exhibited ultrafast intelligent response ability at 1 s. The four-probe experiment proved the resistance of the GO/BP-MoB2 5 composite film was decreased by 105 times after combustion. This strategy not only illustrates that BP can reduce the fire hazards of GO, and the hybridization of MoB2 can achieve better flame retarded efficiency, but also promotes the promising potentials of BP nanosheets in the fast intelligent response.
NSTL
Elsevier