还原氧化石墨烯对B/KNO₃点火药撞击及静电感度的影响

Graphene oxide(GO)was prepared by Hummers method using flake graphite as raw material, and reduced graphene- oxide(rGO)was obtained by further thermal reduction. The apparent morphology of the material before and after reduction was observed by scanning electron microscope. The change of oxygen-containing functional groups on the surface of the two graphene derivative sheets was analyzed and compared by infrared spectroscopy. The thermal diffusivity and resistivity of B /KNO₃ ignition powder with different ratios of rGO were measured. According to the national military standard GJB5891-2006, the characteristic drop height, the critical ignition voltage, and the 50% firing energy of the boron-based ignition powder with different ratios of rGO were tested. Results show that after adding 1%-5% rGO, the thermal conductivity of ignition powder increases from 0.573 W•(m•K)^-1 to 0.620 W•(m•K)^-1, the resistivity of ignition powder decreases from the insulator to 1.11×10 5 Ω•cm, the characteristic drop height of ignition powder increases from 42.3 cm to 59.0 cm, and the critical ignition voltage increases from 5 kV to 25 kV, revealing that a small amount of rGO can significantly improve the impact sensitivity and electrostatic sensitivity of the ignition powder, and rGO has potential application value in the safety regulation of compound energetic materials.