Zhao Ran, Amstad Esther
Soft Materials Laboratory, Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, 1015, Switzerland.
Swiss National Center for Competence in Research (NCCR) Bio-inspired materials, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland.
Small. 2025 Feb;21(7):e2401052. doi: 10.1002/smll.202401052. Epub 2024 Sep 2.
Certain biominerals, such as sea sponges and echinoderm skeletons, display a fascinating combination of mechanical properties and adaptability due to the well-defined structures spanning various length scales. These materials often possess high density normalized mechanical properties because they contain well-defined pores. The density-normalized mechanical properties of synthetic minerals are often inferior because the pores are stochastically distributed, resulting in an inhomogeneous stress distribution. The mechanical properties of synthetic materials are limited by the degree of structural and compositional control currently available fabrication methods offer. In the first part of this review, examples of structural elements nature uses to impart exceptional density normalized Young's moduli to its porous biominerals are showcased. The second part highlights recent advancements in the fabrication of bio-informed mineral-based composites possessing pores with diameters that span a wide range of length scales. The influence of the processing of mineral-based composites on their structures and mechanical properties is summarized. Thereby, it is aimed at encouraging further research directed to the sustainable, energy-efficient fabrication of synthetic lightweight yet stiff mineral-based composites.
某些生物矿物,如海绵和棘皮动物的骨骼,由于跨越各种长度尺度的明确结构,展现出了机械性能和适应性的迷人组合。这些材料通常具有高密度归一化机械性能,因为它们含有明确的孔隙。合成矿物的密度归一化机械性能往往较差,因为孔隙是随机分布的,导致应力分布不均匀。合成材料的机械性能受到当前可用制造方法所提供的结构和成分控制程度的限制。在本综述的第一部分,展示了自然界用于赋予其多孔生物矿物异常高密度归一化杨氏模量的结构元素实例。第二部分重点介绍了具有跨广泛长度尺度直径孔隙的生物启发型矿物基复合材料制造方面的最新进展。总结了矿物基复合材料加工对其结构和机械性能的影响。从而旨在鼓励进一步开展针对可持续、节能制造合成轻质但坚硬的矿物基复合材料的研究。