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

Defence Technology（防务技术） 2023年第1期19卷 52-62页

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 School of Chemistry and Chemical Engineering Nanjing University of Science&TechnologyNanjing210094China Micro-Nano Energetic Devices Key Laboratory Ministry of Industry and Information TechnologyNanjingJiangsu210094China College of Field Engineering Army Engineering University of PLANanjing210007China

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.

关键词： al-Core heterojunction structure Metastable intermolecular composites(MIC) al/cuo nanothermites Polyvinylpyrrolidone(PVP)

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