Synthesis and characterization of a new energy material: Pyridinium dinitramide (Py-DN)

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 53; pp. 411 - 415
• Main Authors: Kim, Wooram, Kwon, Younja, Adelodun, Adedeji A., Jo, Youngmin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.09.2017; 한국공업화학회
• Subjects: Energy material; Green oxidizer; Liquid monopropellant; Pyridinium dinitramide; Thermal property; 화학공학; Green oxidizer; Thermal property; Liquid monopropellant; Energy material; Pyridinium dinitramide
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2017.05.013

Solid oxidizer pyridinium dinitramide (Py-DN, C5H5NH+·N−(NO2)2), a new chlorine-free energetic oxidizer with less toxicity was synthesized as a high performance green propellant. [Display omitted] A solid oxidizer pyridinium dinitramide (Py-DN) has been newly synthesized as a low toxic chlorine-free energetic oxidizer. The reaction yield increased by 10% higher than the other dinitramide such as ADN because Py-DN was directly converted without sequential precipitation of intermediates. A thermal analyzer, a UV–visible spectrometer and a Fourier transform-infra-red spectrometer were used to characterize the physical and chemical properties of the synthesized Py-DN, and the results were compared with previously prepared salts of ammonium dinitramide (ADN, NH4N(NO2)2) and guanidine dinitramide [GDN, NH2C(NH2)NH2N(NO2)2]. The characteristic endothermic and exothermic decomposition temperatures of Py-DN were 77.4°C and 144.7°C, respectively, and the material had a combustion caloric value of 1,739J/g. These low values indicate that Py-DN is more thermally sensitive than the conventional dinitramides. Furthermore, it enables to decrease the decomposition temperature, which can reduce preheating temperature required for thruster operation.