Enhanced Thermal Decomposition and Safety of Spherical CL-20@MOF-199 Composites via Micro-Nanostructured Self-Assembly Regulation

• DOI: 10.1021/acsami.3c06732
• Publication Date: 2023-08-23T17:37:46Z
• Authors: Haojie Li; Wenchao Tong; Zhenzhan Yan; Long Li; Shuang Wang; Junda Huo; Li Yang; Jimin Han; Xiaoting Ren; Wei Li

The characteristics of high burning rate, energy output, and low pressure exponent have always been the focus development in field composite solid rocket propellants. In this paper, a metal–organic framework (MOF-199) compound is introduced to prepare micro-nanospherical CL-20@MOF-199 composites via spray-drying self-assembly technique reach above goals. MOF-199, which acts as an attractive combustion catalyst safety regulator, uniformly coated on surface CL-20 with close interface contact between particles, effectively accelerating thermal decomposition ensuring performance. average noncovalent interaction (aNCI) analysis illustrates that there are strong C–H···O hydrogen bonds van der Waals MOF-199 molecules, greatly enhancing effect interparticle assembly. effects different contents thermal, safety, properties were discussed. demonstrates has significant catalytic CL-20, advanced peak temperature 14.2 °C reduced activation barrier 34.2 kJ·mol–1, mainly benefitting from more exposed active sites contact. addition, exhibit decreased mechanical sensitivity (IS: 21–40 cm, FS: 80–240 N) excellent This work clearly both superior good buffer for it opens new potential further applications