CHINESE JOURNAL OF ENERGETIC MATERIALS
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三维网络结构CL-20/Al@Co/NBC复合物的制备与性能
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西南科技大学环境友好能源材料国家重点实验室, 四川 绵阳 621010

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Preparation and Properties of the 3D Network-shaped CL-20/Al@Co/NBC Composite
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State Key Laboratory of Environmental-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China

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    摘要:

    为了改善Al粉在混合炸药中的释能特性,综合微结构设计和Al颗粒表面改性优势,构筑了三维网状六硝基六氮杂异伍兹(CL-20)/Al@Co/硝化细菌纤维素(NBC)复合物。首先采用置换法在Al粉表面包覆Co,形成核壳结构Al@Co粒子;再利用模板法将Al@Co和CL-20沉积在NBC的三维网状结构中,得到三维网状CL-20/Al@Co/NBC复合物。采用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)和傅里叶变换红外光谱(FT-IR)进行形貌结构表征,并通过热分析、感度和燃烧测试进行性能分析。结果表明,Al@Co粒子为Co在Al表面形成一层厚度约32 nm包覆层。CL-20/Al@Co/NBC复合物呈三维网状结构,与相应的NBC+CL-20+Al混合物及CL-20/Al/NBC复合物相比,Al的高温热分解峰温分别提前123.7 ℃和99.5 ℃,放热量分别增加5.93 kJ·g-1和4.50 kJ·g-1。且CL-20/Al@Co/NBC的点火延迟时间更短、燃烧速率更快;撞击感度(30 J)和摩擦感度(192 N)均有所降低。

    Abstract:

    In order to improve the energy release characteristics of Al powder in composite explosives, combining the advantages of microstructure design and surface modification of Al particles, hexanitrohexaazaisowurtzitane (CL-20)/Al@Co/nitrated bacterial cellulose (NBC) composite with 3D network structure was prepared. Firstly, Al@Co particles were synthesized by coating Al with Co via the replacement reaction. Then, Al@Co and CL-20 particles were deposited into the 3D network structure of NBC to form CL-20/Al@Co/NBC composite with 3D network structure. The transmission electron microscopy (TEM), scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR) were used to characterize the morphology and structure of the composites. The properties were analyzed by thermal analysis, sensitivity test and combustion test. The results show that the Al@Co particles are formed by coating Co on the Al surface with a thickness of about 32 nm. The CL-20/Al@Co/NBC composite has a 3D network structure. Compared with the NBC+CL-20+Al mixture and CL-20/Al/NBC composite, the higher thermal decomposition peak temperature of Al in CL-20/Al@Co/NBC composite is elevated by 123.7 ℃ and 99.5 ℃, and the heat release is increased by 5.93 kJ·g-1 and 4.50 kJ·g-1, respectively. Moreover, CL-20/Al@Co/NBC has a shorter ignition delay time, faster combustion rate, lower impact sensitivity (30 J) and friction sensitivity (192 N).

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曹云杉,李豪,易雪玲,等. 三维网络结构CL-20/Al@Co/NBC复合物的制备与性能[J]. 含能材料,DOI:10.11943/CJEM2024172.

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  • 收稿日期: 2024-07-02
  • 最后修改日期: 2024-09-13
  • 录用日期: 2024-09-14
  • 在线发布日期: 2024-09-18
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