Enhanced non-linear viscoelastic properties of TATB-based polymer bonded explosives filled with hybrid graphene/multiwalled carbon nanotubes
Enhanced non-linear viscoelastic properties of TATB-based polymer bonded explosives filled with hybrid graphene/multiwalled carbon nanotubes
复制标题
杂化石墨烯/多壁碳纳米管填充TATB基聚合物粘结炸药的增强非线性粘弹性能
DOI：
10.1039/c5ra21515c
复制
发表时间：
2015
期刊：
影响因子：
3.9
通讯作者：
Liu Shijun
中科院分区：
文献类型：
--
作者：
Lin Congmei;He Guansong;Liu Jiahui;Huang Zhong;Pan Liping;Zhang Jianhu;Liu Shijun
本文采用石墨烯/多壁碳纳米管（MWCNTs）杂化纳米填料改善1，3，5-三氨基-2，4，6-三硝基苯（TATB）基高聚物粘结炸药（PBX）的非线性粘弹性。研究了TATB基配方的形貌、力学性能和蠕变行为。将结果与具有单独石墨烯纳米添加剂的相应复合材料进行比较。扫描电子显微镜观察结果表明，石墨烯颗粒在石墨烯/多壁碳纳米管复合材料中分散良好，而石墨烯片在单独石墨烯填充的PBX中容易聚集。杂化石墨烯/多壁碳纳米管改性PBX在整个温度范围内表现出更高的储能模量。20 °C下的压缩断裂能（Wc）和拉伸断裂能（Wt）比不含纳米填料的PBX分别提高了31.6%和89.6%。复合材料的蠕变响应是通过不同温度和应力下的短时蠕变试验确定的。TATB基PBX的蠕变柔量曲线显示石墨烯和MWCNTs在提高抗蠕变性方面具有显著的协同效应。石墨烯纳米颗粒的更好的分散性和更高的界面区域，这在石墨烯和聚合物基体之间产生了强的界面相互作用以限制聚合物链的流动性，被认为是TATB基PBX的抗蠕变性改善的关键因素。
In this work, hybrid graphene/multiwalled carbon nanotubes (MWCNTs) nanofillers were selected to improve to non-linear viscoelastic properties of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB)-based polymer bonded explosive (PBX). The morphology, mechanical properties, and creep behaviors of TATB-based formulations were studied. The results were compared with the corresponding composites with individual graphene nano-additives. Scanning electron microscopy observation results indicated graphene particles were fairly well dispersed in the nanocomposite filled with hybrid graphene/MWCNTs, while graphene sheets were prone to aggregation in the PBX filled with individual graphene. Hybrid graphene/MWCNTs modified PBX exhibited higher storage modulus in the whole temperature range. The compressive fracture energy (Wc) and tensile fracture energy (Wt) at 20 °C were up to 31.6% and 89.6% higher than that of PBX without nanofillers. The creep responses of the composites were determined by short-time creep tests at various temperatures and stresses. The creep compliance curve for TATB-based PBXs showed a remarkable synergetic effect between graphene and MWCNTs in improving the creep resistance. The better dispersion of graphene nanoparticles and higher interfacial zones, which produced strong interfacial interaction between the graphene and polymer matrix to restrict the mobility of polymer chains, were considered as crucial factors for the improvement in the creep resistance for TATB-based PBXs.