摘要：At present,metal-organic framework(MOF)-derived nano-micro architectures are actively explored for electromagnetic(EM)wave absorption owing to their flexible composition and structural manipulation that enhance dielectric and magnetic ***,the basic design principles in MOF-derived microwave absorption materials have not been *** review is devoted to analyzing design principles in MOF-derived microwave absorption materials from the following perspectives:diverse monomers(ligands and ions of MOFs),topologies,chemical states,and physical *** derived essential information regarding the EM wave absorption mechanism and the structural-functional dependency is also comprehensively ***,a clear insight into the challenges and perspectives of the industrial revolution upgrading in this promising field is proposed.

摘要：以炭黑(CB)为导电填料,均聚聚丙烯(i PP)和抗冲聚丙烯(hi PP)为基体,通过熔融共混法制备了i PP/CB和hi PP/CB复合材料,研究了基体结晶度对复合材料渗流阈值的影响。表征了i PP/CB复合材料和hi PP/CB复合材料的熔融、结晶行为,并观测了复合材料的微观结构,结果显示CB在结晶度更高的i PP中形成了更完善的导电网络。经测试,i PP/CB复合材料的渗流阈值为CB质量分数2.69%,室温体积电阻率为9.3×104Ω·m,PTC强度为0.55;hi PP/CB复合材料的渗流阈值为CB质量分数3.81%,室温体积电阻率为8.9×105Ω·m,PTC强度为0.42。表明结晶度更高的基体i PP可以更有效地降低复合材料的渗流阈值。

摘要：针对硝胺推进剂能量提高与力学性能降低的矛盾,阐述了硝胺推进剂产生"脱湿"现象的原因和键合剂的选择原则,设计了聚醚环酰胺类和中性聚合物2类聚合物键合剂,为用于硝胺推进剂键合剂的研究提供一条新途径。

摘要：针对宝钢湛江钢铁基地原料码头遭遇超强台风袭击造成三台大型卸船机瞬间全部倾覆的事故,分析了设备制造厂提供的防风锚固设计方案的缺陷及对南海海域台风认识的不足,首次提出了强风袭击方向的随机性、最大迎风投影计算面积等概念。论述了大型港机非工作状态下遭遇强风时的最大迎风面积计算方法、最不利风向作用下的锚固系统受力工况、组合防风锚固系统设计等要点。可为今后大型港机抗风防台锚固系统设计提供参考,减少港机遭遇台风袭击出现倾覆事故的概率。