CHINESE JOURNAL OF ENERGETIC MATERIALS
+高级检索
三维纳米结构FOX-7的构筑与热分解性能
作者:
作者单位:

1.西南科技大学 环境友好能源材料国家重点实验室;2.四川航天川南火工技术有限公司;3.西安近代化学研究所

作者简介:

通讯作者:

基金项目:

国家自然科学基金(11572270),西南科技大学研究生创新基金(17ycx025)


Construction and Thermal Decomposition Properties of Three-dimensional Nanostructure FOX-7
Author:
Affiliation:

1.State Key Laboratory of Environment-friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China;2.Sichuan Aerospace Chuanan Fire Technology Corporation, Luzhou 646000, China;3.Xi''an Modern Chemistry Research Institute, Xi''an 710065,China

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    以具有三维纳米网格结构且可降解的聚缩醛胺气凝胶(PHA)作模板,采用蒸发结晶法,原位诱导1,1-二氨基-2,2-二硝基乙烯(FOX-7)结晶析出,得到FOX-7/PHA复合物,然后利用硫酸的稀溶液(10%)降解去掉模板,即可得到具有三维纳米结构的FOX-7(nano-FOX-7)。高效液相色谱(HPLC)测定nano-FOX-7的纯度为99%,说明模板基本去除完全。对样品的形貌、物相、结构和热分解性能进行了表征测试。结果表明,去模板后的nano-FOX-7较为完整地保留了模板PHA的三维纳米网络结构,其中FOX-7的平均晶粒尺寸为83.68 nm。与raw-FOX-7相比,特殊的纳米多孔结构使FOX-7的转晶峰和低温分解峰分别延后11.3 ℃和21.3 ℃,放热几乎集中在高温分解峰291.0 ℃处,分解焓从原料的1309 J·g-1增加到1421 J·g-1,表观活化能提高了128.62 kJ·mol-1,增幅达31.46%,能量释放效率和热稳定性大幅提高。

    Abstract:

    The three-dimensional nanostructured and degradable polyhemiaminal aerogel (PHA) was used as template to induce the in situ crystallization of 1,1-diamino-2,2-dinitroethylene (FOX-7) by evaporation crystallization method. The FOX-7 with three-dimensional nanostructure (nano-FOX-7) was prepared after the degradation of the PHA in dilute sulfuric acid (10%). The purity of nano-FOX-7 was determined to be 99% by high performance liquid chromatography (HPLC), indicating that the template was almost completely removed. The morphology, phase, structure and thermal properties of the samples were characterized. Detemplated nano-FOX-7 preserved three-dimensional nano structure of PHA. The average size of nano-FOX-7 crystal particle was 83.68 nm. Owing to the special micro-nano structure, the peak temperature of phase transition and first thermal decomposition temperature for nano-FOX-7 was delayed by 11.3 °C and 21.3 °C, respectively. Compared with raw FOX-7, the thermal decomposition of nano-FOX-7 almost completely took at exothermal profile with peak of 291.0 °C. The enthalpy of the thermal decomposition increased from 1309 J·g-1 (raw FOX-7) to 1421 J·g-1 (nano-FOX-7), together with 31.6% increase of the apparent activation energy (from 408.80 kJ·mol-1 to 537.42 kJ·mol-1), which explained the remarkable improvement of the energy release efficiency and thermal stability for the nanostructure FOX-7.

    参考文献
    相似文献
    引证文献
文章指标
  • PDF下载次数:
  • HTML阅读次数:
  • 摘要点击次数:
  • 引用次数:
引用本文

刘凯,王建锋,李兆乾,等.三维纳米结构FOX-7的构筑与热分解性能[J].含能材料,2020,28(3):208-214. DOI:10.11943/CJEM2019081.
LIU Kai, WANG Jian-feng, LI Zhao-qian, et al. Construction and Thermal Decomposition Properties of Three-dimensional Nanostructure FOX-7[J]. Chinese Journal of Energetic Materials, 2020, 28(3):208-214. DOI:10.11943/CJEM2019081.

复制
历史
  • 收稿日期: 2019-03-25
  • 最后修改日期: 2019-07-29
  • 录用日期: 2019-05-13
  • 在线发布日期: 2019-07-24
  • 出版日期: 2020-04-03