Significantly enhanced thermal stability of HMX by phase-transition lysozyme coating  

作　　者：Jiahui Liu Congmei Lin Jianhu Zhang Chengcheng Zeng Zhijian Yang Fude Nie 

机构地区：[1]Institute of Chemical Materials,China Academy of Engineering Physics(CAEP),Mianyang 621900,China [2]Graduate School,China Academy of Engineering Physics(CAEP),Mianyang 621900,China

出　　处：《Defence Technology（防务技术）》2024年第5期60-68,共9页Defence Technology

基　　金：the China National Nature Science Foundation(Grant No.12102404)。

摘　　要：A new robust bio-inspired route by using lysozyme aqueous solution for surface modification on 1,3,5,7-tetranitro-1,3,5,7-tetrazocane(HMX)was described in this paper.HMX crystals were coated by in situ phase transition of lysozyme(PTL)molecules.The HMX decorated by PTL was characterized by SEM,XRD,FTIR and XPS,demonstrating a dense core-shell coating layer.The coverage of lysozyme on HMX crystal was calculated by the ratio of sulfur content.The surface coverage increased from 60.5% to 93.5% when the content of PTL was changed from 0.5 wt% to 2.0 wt%,indicating efficient coating.The thermal stability of HMX was investigated by in situ XRD and DSC.The thermal phase transition temperature of HMX(β to δ phase)was delayed by 42℃ with 2.0 wt% PTL coating,which prevented HMX from thermal damage and sensitivity by the effect of PTL coating.After heating at 215℃,large cracks appeared in the naked HMX crystal,while the PTL coated HMX still maintained intact,with the impact energy of HMX dropped dramatically from 5 J to 2 J.However,the impact energy of HMX with 1.0 wt% and 2.0 wt% coating content(HMX@PTL-1.0 and HMX@PTL-2.0)was unchanged(5 J).Present results potentially enable large-scale fabrication of polymorphic energetic materials with outstanding thermal stability by novel lysozyme coating.

关 键 词：HMX LYSOZYME Phase transition Thermal stability Sensitivity 

分 类 号：TQ560.1[化学工程—炸药化工]