CHINESE JOURNAL OF ENERGETIC MATERIALS
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乳化炸药中空功能微囊的制备方法及性能表征
作者:
作者单位:

1.安徽理工大学化学工程学院;2.中国科学技术大学 中科院材料力学行为与设计重点实验室

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基金项目:

国家自然科学基金资助 11602001 51874267 51674229;安徽理工大学青年科学研究基金资助 12947国家自然科学基金资助(11602001;51874267;51674229);安徽理工大学青年科学研究基金资助(12947)


Preparation and Application of Functional Hollow Microcapsules in Emulsion Explosives
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Affiliation:

1.School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China;2.CAS Key Laboratory of Mechanical Behavior and Design, University of Science and Technology of China, Hefei 230026, China

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    摘要:

    针对传统乳化炸药在工程应用中存在的含能添加剂安全性问题和“压力减敏”问题,分别研制了乳化炸药中空含能微囊和中空耐压微囊。中空含能微囊将含能添加剂和敏化剂合二为一,中空耐压微囊具有“自敏化”和“化学敏化”功能。采用扫描电镜、光学显微镜和激光粒度分析仪,对制备的中空含能微囊和中空耐压微囊微观结构进行了表征,采用热分析实验、爆轰性能测试实验、相容性实验,对中空含能微囊敏化的乳化炸药热安全性、爆轰特性和储存稳定性进行了表征,利用光学显微镜对中空耐压微囊受压后,敏化气泡的再生现象进行了验证。实验结果表明,中空含能微囊和中空耐压微囊具有球形形貌且粒径分布均匀,中空含能微囊能够显著提高乳化炸药的爆炸威力且不影响其安全性和储存稳定性,其敏化乳化炸药的猛度为23.20 mm铅柱压缩量,爆速为4797 m·s-1;当外界压力将中空耐压微囊压垮时,微囊内外壳所含物质会发生反应并生成新的敏化气泡,为避免乳化炸药的压力减敏现象提供了双重保障。中空功能微囊结合了敏化剂和功能添加剂的双重特点,能够有效解决传统添加剂存在的问题。

    Abstract:

    Considering the safety problems of energetic additives and “pressure desensitization” in the engineering application of traditional emulsion explosives, hollow energetic microcapsules and hollow pressure-resistant microcapsules were developed.Hollow energetic microcapsules integrated the functions of energetic additives and sensitizers, while hollow pressure-resistant microcapsules had the functions of “self-sensitization” and “chemical sensitization”. The microstructures of hollow energetic microcapsules and hollow pressure-resistant microcapsules were characterized by scanning electron microscopy, optical microscope and laser particle size distribution analyzer. The thermal, detonation and storage stability properties of hollow energetic microcapsules sensitized emulsion explosive were characterized by thermal analysis test, explosion performance experiments and compatibility tests, respectively. The regeneration of sensitized bubbles was verified by observing compressed hollow pressure-resistant microcapsules under an optical microscopy. Results show that the hollow energetic microcapsules and hollow pressure-resistant microcapsules with spherical morphology, uniform particle size distribution, and hollow energetic microcapsules could significantly improve the detonation performance of emulsion explosive without affecting its safety and storage stability. The brisance and detonation speed of the hollow energetic microcapsules sensitized emulsion explosive are 23.20 mm and 4797 m·s-1 ,respectively. After collapse of the hollow pressure-resistant microcapsule under external pressure, the inner and outer substances will react and generate new sensitized bubbles, which avoids the pressure desensitization of emulsion explosive. Hollow functional microcapsules can effectively solve the problems of traditional additives by integrating the characteristics of sensitizers and functional additives.

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引用本文

程扬帆,方华,刘文近,等.乳化炸药中空功能微囊的制备方法及性能表征[J].含能材料, 2019, 27(9):792-800. DOI:10.11943/CJEM2019039.
CHENG Yang-fan, FANG Hua, LIU Wen-jin, et al. Preparation and Application of Functional Hollow Microcapsules in Emulsion Explosives[J]. Chinese Journal of Energetic Materials, 2019, 27(9):792-800. DOI:10.11943/CJEM2019039.

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  • 收稿日期: 2019-02-22
  • 最后修改日期: 2019-07-07
  • 录用日期: 2019-04-01
  • 在线发布日期: 2019-07-05
  • 出版日期: 2019-09-27