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1 2021

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Tuning the Laser Ignition Properties of Nitrocellulose-Nitroglycerine-Hexogen Propellants via Incorporation of Carbon Nanotubes

Shi Xianrui, Jia Yongjie, Chen Linyu, Tian Lu, Shen Jinpeng, Pei Chonghua

Central European Journal of Energetic Materials

2021

Vol. 18, no. 3

385--404

Near infrared laser ignition is challenging owing to the poor near infrared laser absorption of nitrocellulose-nitroglycerine-hexogen (NC-NG-RDX) propellants. Less than 1 wt.% of carbon nanotubes (CNTs) were uniformly dispersed into the NC-NG-RDX propellants to tune its near infrared laser ignition property. The effects of CNTs on the thermal decomposition, near infrared light absorption and thermal conductivity of NC-NG-RDX propellants were studied. The near infrared laser ignition property of NC-NG-RDX propellants doped with CNTs were investigated compared with raw NC-NG-RDX propellant. The decomposition property and thermal conductivity of NC-NG-RDX propellants doped with CNTs were little changed due to the small quantity of CNTs. The laser reflectivity of the composite propellants decreased obviously as the content of CNTs was increased because of the high laser absorption property of CNTs. The laser ignition performance of the composites propellants is substantially improved by the incorporation of 0.5 wt.% or less CNTs and the successful ignition time decreases remarkably. Higher CNT content, such as 0.75 wt.% can lead to failure of laser ignition due to the excessive laser absorption efficiency and heating rate of the radiated region of the composite propellants together with inefficient deflagration. Our research reveals that the appropriate proportion of CNTs can potentially be used as a laser sensitizer for realizing effective infrared laser ignition of NC-NG-RDX propellants.