CHINESE JOURNAL OF ENERGETIC MATERIALS
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CL-20基含能薄膜的微双喷直写成型与性能
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1.中北大学环境与安全工程学院, 山西 太原 030051;2.山西省超细粉体工程技术研究中心, 山西 太原 030051;3.四川省泸州市北方化学工业有限公司, 四川 泸州 646000

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装备发展部领域基金资助(61406190401)


Double-nozzle Microjet Direct Writing and Properties of CL-20 Based Energetic Film
Author:
Affiliation:

1.School of Environment and Safety Engineering, Taiyuan 030051, China;2.Shanxi Engineering Technology Research Centre for Ultrafine Powder, Taiyuan 030051, China;3.Luzhou North Chemical Industries Co., Ltd., Luzhou 646000, China

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    摘要:

    为了获得可在微米尺度下可靠传爆的含能薄膜,以六硝基六氮杂异伍兹烷(CL-20)为主体炸药,以乙基纤维素(EC)和聚叠氮缩水甘油醚(GAP)为复合黏结体系,选用适量的低沸点溶剂,设计了两种适用于微喷直写工艺的油墨配方,并且采用双喷头微喷直写装置对两种油墨材料进行了直写成型。采用扫描电子显微镜、MZ-220SD电子密度计、X射线衍射仪等对成型样品进行了表征,获得了含能薄膜的撞击感度、热分解性能和传爆临界厚度。结果表明:CL-20基含能薄膜表面光滑,内部存在多个微小孔隙, CL-20颗粒较小,晶型为ε型,含能薄膜的成型密度为1.547 g·cm-3,达到最大理论密度的79.2%。CL-20基含能薄膜的热分解表观活化能为241.21 kJ·mol-1,撞击感度特性落高为65.7 cm,临界传爆尺寸为1.0 mm×0.045 mm。

    Abstract:

    In order to obtain a CL-20 based energetic film that can be reliably detonated at the micrometer scale, hexanitrohexaazaisowurtzitane (CL-20), ethyl cellulose (EC) and poly azido-glycidyl ether (GAP) are selected as the main explosive and bonding system respectively, two ink formulations suitable for the micro-spray direct writing process have been designed and formulated with adding an appropriate amount of low-boiling solvent. The two ink materials are directly written by a double-nozzle microjet direct writing device. The molded samples were characterized by scanning electron microscope, MZ-220SD electron density meter and X-ray diffractometer. The impact sensitivity, thermal decomposition performance and critical thickness of the entrapped film were investigated. Results show that CL-20 based energetic film has a smooth surface and many tiny pores inside, the microstructure size is about 1 μm. The crystal form of CL-20 in membrane is ε type. The forming density of the energetic film is 1.547 g·cm-3, reaching 79.2% of the maximum theoretical density. The apparent activation energy of thermal decomposition and drop height (impact sensitivity) of CL-20 based energetic film is 241.21 kJ·mol-1 and 65.7 cm apart, which are both improved compared with raw material CL-20. The critical detonation thickness of the energetic film is 1.0 mm×0.045 mm, demonstrating excellent microscale detonation capability.

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引用本文

孔胜,安崇伟,徐传豪,等. CL-20基含能薄膜的微双喷直写成型与性能[J].含能材料, 2020, 28(11):1048-1053. DOI:10.11943/CJEM2020041.
KONG Sheng, AN Chong-wei, XU Chuan-hao, et al. Double-nozzle Microjet Direct Writing and Properties of CL-20 Based Energetic Film[J]. Chinese Journal of Energetic Materials, 2020, 28(11):1048-1053. DOI:10.11943/CJEM2020041.

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  • 收稿日期: 2020-02-26
  • 最后修改日期: 2020-07-21
  • 录用日期: 2020-07-09
  • 在线发布日期: 2020-07-20
  • 出版日期: 2020-11-25