A low-cost bionic interface modification strategy for enhancing the safety performance of energetic powders using PCPA@MXene double coating

IF 3.3 Q2 CHEMISTRY, MULTIDISCIPLINARY

Energetic Materials Frontiers Pub Date : 2025-03-01 DOI:10.1016/j.enmf.2025.01.002

Bo-wei Gao , Yan-ze Liu , Xiao-feng Guo , Xu-ran Xu , Hai-feng Yang , Guang-cheng Yang , Jing Lv , Ling-hua Tan

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Abstract

Based on a simple catechol-amine co-precipitation strategy and biomimetic adhesion characteristics, this study prepared a desensitized CL-20@PCPA core-shell energetic powder using the phenolic and amino compound containing low-cost polycatechol/polyamine (PCPA). The results indicate that the CL-20@PCPA composite powder exhibited an elevated characteristic drop height of impact sensitivity (H₅₀) of 34.9 cm and a reduced friction explosion probability of 56 % compared to pure CL-20. PCPA, containing catechol and amine groups, provided a stable platform for secondary modification to enhance the safety of the powder further. Notably, when the CL-20@PCPA@MXene powder was introduced into a propellant system, the resulting propellants displayed a high H₅₀ value of 20.3 cm while its heat of detonation remained unchanged. This study provides a simple and low-cost biomimetic interface modification strategy for preparing desensitized energetic materials.

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利用PCPA@MXene双涂层提高高能粉末安全性能的低成本仿生界面改性策略

基于简单的儿茶酚-胺共沉淀策略和仿生粘附特性，本研究采用低成本多儿茶酚/多胺（PCPA）的酚类和氨基化合物制备了脱敏CL-20@PCPA核壳能量粉末。结果表明，与纯CL-20相比，CL-20@PCPA复合粉末的冲击敏感性特征跌落高度（H50）提高了34.9 cm，摩擦爆炸概率降低了56%。PCPA含有儿茶酚和胺基，为二次改性提供了稳定的平台，进一步提高了粉体的安全性。值得注意的是，当CL-20@PCPA@MXene粉末被引入推进剂系统时，所得到的推进剂的H50值高达20.3 cm，而爆轰热保持不变。本研究为制备脱敏含能材料提供了一种简单、低成本的仿生界面修饰策略。

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