Positive effects of PVP in MIC:Preparation and characterization of Al-Core heterojunction fibers

作     者：Fuwei Li Yue-ting Wang Cheng-ai Wang Yun Shen Ze-hua Zhang Jian Cheng Shuang-zhang Wu Ying-hua Ye Rui-qi Shen Fuwei Li;Yue-ting Wang;Cheng-ai Wang;Yun Shen;Ze-hua Zhang;Jian Cheng;Shuang-zhang Wu;Ying-hua Ye;Rui-qi Shen

作者机构：School of Chemistry and Chemical EngineeringNanjing University of Science&TechnologyNanjing210094China Micro-Nano Energetic Devices Key LaboratoryMinistry of Industry and Information TechnologyNanjingJiangsu210094China College of Field EngineeringArmy Engineering University of PLANanjing210007China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2023年第19卷第1期

页      面：52-62页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Al-Core heterojunction structure Metastable intermolecular composites(MIC) Al/CuO nanothermites Polyvinylpyrrolidone(PVP) 

摘      要：The core-shell metastable intermolecular composites(MIC)have attracted much attention in the past few years due to their unique ***,the preparation of Al-Core heterojunction fibers using PVP as a template is *** nano-Al was directly added to the precursor solution of cupric acetate monohydrate(CAM)/Polyvinylpyrrolidone(PVP),and the initial Al@CAM/PVP fibers were obtained via *** core-shell MIC fibers are then obtained by calcining the initial *** morphology,structure,and composition of Al-core MIC fibers were characterized,that the energetic fibers calcined at 300℃,350℃,and 400℃have a core-shell structure with shell compositions CuxO and PVP,CuxO and Cu O,*** energy release characteristics of Al-core MIC were investigated,and preliminary ignition tests were performed using an ignition temperature measuring instrument and a pulsed *** energetic fibers calcined at 300℃exhibited unique *** decomposition of PVP in the shell layer promoted exotherm,and a low-temperature exothermic peak was shown at 372-458℃.Lower ignition temperatures and higher flame heights were observed in the combustion tests than calcination at 350℃and 400℃.An unexpected result was that PVP can play a positive role in Al/CuO ***,this preparation method provided an idea for the integrated preparation of core-shell Al-Core MIC fibers and tuning the properties of MIC.