State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
Adv Mater. 2021 Apr;33(15):e2007348. doi: 10.1002/adma.202007348. Epub 2021 Mar 6.
Cellular materials with excellent mechanical efficiency are essential for aerospace structures, lightweight vehicles, and energy absorption. However, current synthetic cellular materials, such as lattice materials with a unit cell arranged in an ordered hierarchy, are still far behind many biological cellular materials in terms of both structural complexity and mechanical performance. Here, the complex porous structure and the mechanics of the cuttlebone are studied, which acts as a rigid buoyancy tank for cuttlefish to resist large hydrostatic pressure in the deep-sea environment. The cuttlebone structure, constructed like lamellar septa, separated by asymmetric, distorted S-shaped walls, exhibits superior strength and energy-absorption capability to the octet-truss lattice and conventional polymer and metal foams. Inspired by these findings, mechanically efficient cellular materials are designed and fabricated by 3D printing, which are greatly demanded for many applications including aerospace structures and tissue-engineering-scaffold. This study represents an effective approach for the design and engineering of high-performance cellular materials through bioinspired 3D printing.
具有优异机械效率的多孔材料对于航空航天结构、轻型车辆和能量吸收至关重要。然而，目前的合成多孔材料，如具有有序层次结构的晶格材料，在结构复杂性和机械性能方面仍然远远落后于许多生物多孔材料。本文研究了墨鱼骨的复杂多孔结构和力学性能，墨鱼骨作为墨鱼的刚性浮力舱，可抵抗深海环境中的巨大静水压力。墨鱼骨结构由片状隔层构成，由不对称、扭曲的 S 形壁隔开，其强度和能量吸收能力优于八面体桁架晶格以及传统聚合物和金属泡沫。受此启发，通过 3D 打印设计并制造出机械效率高的多孔材料，这在包括航空航天结构和组织工程支架在内的许多应用中都有很大的需求。本研究通过生物启发的 3D 打印为高性能多孔材料的设计和工程提供了一种有效的方法。
