This work shows how to improve the energy dissipation of open-cell polyurethane (PU) foams by creating multilayered graphene oxide (GO) nano-architectures onto the struts via a modified dip-coating process. Pristine PU foams are alternately dip-coated with GO coatings and water-based polyurethane dispersions (PUD) for a given number of times. The GO coating morphologies are carefully adjusted and the inner energy dissipation mechanisms reach the optimized interfacial frictions of GO-PU and GO-GO. Along with the synergistic effect of the multiple interpenetrating structure of GO/PU coating phases, these engineered composite foams with extremely low GO content (~0.12 wt%) afford a significant increase of quasi-static energy dissipation (52%) and dynamic damping (76%) when compared with counterpart foams coated with the same number of pure PUD layers. The specific Young’s modulus and strength of the designed foams also show remarkable enhancements of 310% and 490% respectively compared with those of pristine PU foams.

这项工作表明如何通过改进的浸涂工艺在支杆上创建多层氧化石墨烯（GO）纳米结构，从而改善开孔聚氨酯（PU）泡沫的能量消耗。原始PU泡沫交替涂有GO涂层和水基聚氨酯分散体（PUD）一定次数。仔细调整GO涂层的形貌，内部能量耗散机制达到GO-PU和GO-GO的最佳界面摩擦。连同GO / PU涂层相的多重互穿结构的协同效应，这些工程化的复合材料泡沫具有极低的GO含量（约0.12 wt％），显着提高了准静态能量耗散（52％）和动态阻尼（与涂有相同数量的纯PUD层的同类泡沫相比，则为76％）。