A kind of preparation method of graphene-coated spherical ammonium dinitramide

Abstract

The invention discloses a method for preparing graphene-coated spheroidization ammonium dinitramide. The method includes steps of firstly, preparing spheroidization ammonium dinitramide by the aid ofnormal-temperature or low-temperature re-crystallization processes under joint induction effects of ultrasonic waves-nitramine explosive; secondly, preparing graphene-coated spheroidization ammonium dinitramide composite materials by the aid of ultrasonic-anti-solvent processes. The method has the advantages that conventional high-temperature melting ammonium dinitramide spheroidization technologies are improved, accordingly, risks due to local overheating or aggregation of materials at the high temperatures can be reduced, and the technological realization of spheroidization-coating processescan be expanded; the spheroidization ammonium dinitramide is coated by high-activity graphene oxide with mutual effects with the spheroidization ammonium dinitramide, accordingly, binding force between the graphene oxide and the spheroidization ammonium dinitramide can be increased, and the moisture absorption of ammonium dinitramide can be obviously deteriorated.

Description

technical field

[0001] The invention relates to the technical field of propellants, in particular to a preparation method of graphene-coated spherical ammonium dinitramide. Background technique

[0002] Ammonium dinitramide (ADN) is a new type of oxidant, its molecule contains both oxidant and fuel components, high oxygen content, and the heat of formation is -148.4~-149.6kJ / mol. oxidizing agents. Different from the oxidizer widely used in current propellants—AP (heat of formation is -295.5kJ / mol), its molecular structure does not contain chlorine, and its combustion products have no "smoke", which makes the launch of missiles have low signal characteristics and is environmentally friendly. Pollution is small. However, the synthesized ADN is generally flaky or needle-like crystals, which are easy to enrich and affect the rheological properties of the slurry and the combustion performance of the propellant. The crystalline ADN prepared by the commonly used recrystallizatio...