Ameliorating the performances of 3,4-bis(4′-nitrofurazano-3′-yl)furoxan (DNTF) by establishing tannic acid (TA) interface layer on DNTF surface

Through the self-assembly reaction of tannic acid (TA), TA and TA-Cu interface layers are established on 3,4-bis(4′-nitrofurazano-3′-yl)furoxan (DNTF) surface to ameliorate its performances. The coating effects of TA and TA-Cu layer on DNTF surfaces are characterized by scanning electron microscope (SEM). The interactions between DNTF surfaces and TA are analyzed by molecular dynamics (MD) simulations. The properties of [email protected] and [email protected] composites are characterized by differential scanning calorimetry (DSC), accelerating rate calorimeter (ARC), explosion point, vacuum deflation volume and mechanical sensitivities. The residues of [email protected] and [email protected] composites after explosion are collected and then characterized by SEM and X-ray diffraction (XRD) to study the catalytic effects of Cu. The catalytic mechanism of CuO on DNTF are studied by density functional theory (DFT). The study results show that TA and TA-Cu layer have good coating effects on DNTF surface. Compared with pure DNTF, the explosion points are increased while the vacuum deflation volumes and mechanical sensitivities are decreased for both [email protected] and [email protected], illustrating that the safeties of [email protected] and [email protected] composites are improved. In addition, the initial decomposition temperature and peak temperature of [email protected] and [email protected] obtained by DSC are increased, demonstrating that the thermal stabilities of [email protected] and [email protected] are increased. Compared with pure DNTF and [email protected], the decomposition period of [email protected] composite is reduced, illustrating that Cu can enhance the decomposition rate of DNTF. Compared with pure DNTF, the energy barrier of initial decomposition of CuO-DNTF is decreased, implying that CuO can catalyze the decomposition of DNTF.