Liu Xi-Chen, Luo Yi-Min, Xu Fei-Yang, Wu Xing-Liang, Wei Xiao-An, Liu Da-Bin, Wang Bin-Bin
School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu, China.
Sci Rep. 2024 Dec 3;14(1):30104. doi: 10.1038/s41598-024-79737-w.
Polymeric hydrogels, known for their excellent mechanical properties and pre-cross-linking flowability, provide a promising solution for recycling waste propellants, ensuring safety and maintaining explosive performance. This study developed a double cross-linked network energetic hydrogel that effectively combines mechanical strength with explosive capabilities. Using a Ford 4 Cup, temperature data logger, universal testing machine, and detonation performance tests, we examined the impacts of kinematic viscosity, cross-linking time, compressive strength, and explosive properties. The optimal kinematic viscosity for stabilizing hollow glass microspheres (GM) was found to be 129.7 mm/s. Cross-linking time was negatively correlated with initiator, catalyst levels, and reaction temperature, but positively correlated with retarder content. Compressive strength increased with acrylamide (AM) content and showed an initial rise before decreasing with N,N'-methylenebisacrylamide (MBAA) content and reaction temperature. The maximum compressive strength was achieved with 5% MBAA (of AM mass fraction) at 40 °C. Detonation velocity and steel plate damage decreased with increasing AM content and initially increased then decreased with GM content. A balance of mechanical and explosive properties was achieved with 6% AM and 4% GM, resulting in a detonation velocity of 4536 m/s. This hydrogel shows significant potential for waste munitions management.
聚合物水凝胶以其优异的机械性能和预交联流动性而闻名，为回收废弃推进剂提供了一个有前景的解决方案，既能确保安全又能保持爆炸性能。本研究开发了一种双交联网络含能水凝胶，它有效地将机械强度与爆炸能力结合起来。我们使用福特4号杯、温度数据记录器、万能试验机和爆轰性能测试，研究了运动粘度、交联时间、抗压强度和爆炸性能的影响。发现稳定空心玻璃微球（GM）的最佳运动粘度为129.7毫米/秒。交联时间与引发剂、催化剂用量和反应温度呈负相关，但与缓凝剂含量呈正相关。抗压强度随丙烯酰胺（AM）含量的增加而增加，并在随N，N'-亚甲基双丙烯酰胺（MBAA）含量和反应温度增加而下降之前呈现出先上升的趋势。在40℃下，当MBAA含量为5%（占AM质量分数）时，可达到最大抗压强度。爆速和钢板损伤随AM含量的增加而降低，并随GM含量的增加先升高后降低。当AM含量为6%和GM含量为4%时，实现了机械性能和爆炸性能的平衡，爆速为4536米/秒。这种水凝胶在废旧弹药管理方面显示出巨大潜力。
