Fabrication and characterization of HMX@TPEE energetic microspheres with reduced sensitivity and superior toughness properties
Fabrication and characterization of HMX@TPEE energetic microspheres with reduced sensitivity and superior toughness properties
复制标题
具有降低灵敏度和优异韧性的 HMX@TPEE 含能微球的制备和表征
DOI：
10.1016/j.compscitech.2017.02.017
复制
发表时间：
2017-04-12
影响因子：
9.1
通讯作者：
Gong, Feiyan
中科院分区：
文献类型：
--
作者：
Li, Yubin;Yang, Zhijian;Gong, Feiyan
开发一种简便的方法来改善刚性粒子与涂层聚合物之间的界面相互作用对于含能复合材料，特别是军事用途的含能复合材料具有重要意义。本文首次以Octahydro-1，3，5，7-tetranitro-1，3，5，7-tetrazocine为核材料，热塑性聚酯-醚弹性体为壳材料，采用乳化溶剂挥发法制备了球状、韧性、低感度含能复合材料。从所制备的HMX@TPEE含能微球的形貌和结构特征可以看出，在复合乳化剂和合适的核壳比条件下，所制备的HMX@TPEE含能微球具有均匀的球形、窄的尺寸分布和蜂窝状的包覆结构。在巴西测试和动态力学分析(DMA)中，HMX@TPEE微球具有良好的韧性，为增强HMX粒子与TPEE基质之间的界面相互作用提供了一条新的途径。此外，由于这种奇异的蜂窝结构具有良好的能量分散性，在HMX/TPEE比例为5/1时，BAM撞击感应仪测量的HMX@TPEE微球的感度可以显著降低，撞击能(E-li)可以从3.5J提高到8.0J。这种通过表面ESV工艺制备包覆量可调的HMX@TPEE微球可能为HMX基含能复合材料在先进武器系统中提高安全性和韧性提供了一条有希望的途径。(C)2017爱思唯尔有限公司。保留所有权利。
The development of a facile method for improvement of interface interaction between rigid particles and coating polymer is of great importance for energetic composite materials, especially for military purpose. In this paper, energetic composites with spherical morphology, toughness property and low sensitivity are firstly fabricated by using Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) as core material and thermoplastic polyester-ether elastomer (TPEE) as shell material via an emulsion solvent evaporation (ESV) method. From the morphology and structure characteristic of as-prepared energetic micro spheres, it is found that the HMX@TPEE energetic microspheres have uniform spherical morphologies, narrow size distribution and honeycomb coating structure under the circumstance of compound emulsifiers and appropriate core-shell ratio. The good toughness of HMX@TPEE microspheres in Brazilian test and dynamic mechanical analysis (DMA) demonstrates a new route to enhance interface interaction between HMX particles and TPEE matrix. Moreover, because of the favorable energy decentralizing property of this exotic honeycomb structure, the sensitivity of HMX@TPEE micro spheres measured by BAM impact sensitivity instrument can be markedly decreased and the impact energy (E-li) can be improved from 3.5 J to 8.0 J at the HMX/TPEE ratio of 5/1. This fabrication of HMX@TPEE microspheres with adjustable coating content via a facile ESV process might provide a promising approach for HMX based energetic composites to enhance the safety and toughness properties when used in advanced weapon system. (C) 2017 Elsevier Ltd. All rights reserved.