美国麻省理工学院科研人员7月26日说，生活在塞内加尔的一种鱼的鱼鳞坚韧无比，对研制新一代士兵防弹服具有重要参考价值。

这种鱼名为塞内加尔多鳍鱼，生活在当地沼泽中。成年塞内加尔多鳍鱼身长大约40厘米，有多层鱼鳞。

麻省理工学院科研人员发现，鱼鳞厚度大约为万分之五米，分为4层，每层结构不同。科研人员对鱼鳞进行模拟撕咬试验，发现鱼鳞能最大限度化解冲击力，有效保护鱼鳞下面的软组织不受伤害。

麻省理工学院材料科学副教授克里斯廷·奥尔蒂斯说，塞内加尔多鳍鱼鱼鳞“结构奇妙、复杂”，为研发新一代防弹服开拓了思路。

相关研究7月27日发表在《自然—材料学》（Nature Materials）杂志上。（生物谷Bioon.com）

生物谷推荐原始出处：

Nature Materials，doi:10.1038/nmat2231，Benjamin J. F. Bruet，Christine Ortiz

Materials design principles of ancient fish armour
Benjamin J. F. Bruet1,1, Juha Song1,1, Mary C. Boyce2 & Christine Ortiz1

Abstract
Knowledge of the structure–property–function relationships of dermal scales of armoured fish could enable pathways to improved bioinspired human body armour, and may provide clues to the evolutionary origins of mineralized tissues. Here, we present a multiscale experimental and computational approach that reveals the materials design principles present within individual ganoid scales from the 'living fossil' Polypterus senegalus. This fish belongs to the ancient family Polypteridae, which first appeared 96 million years ago during the Cretaceous period and still retains many of their characteristics. The mechanistic origins of penetration resistance (approximating a biting attack) were investigated and found to include the juxtaposition of multiple distinct reinforcing composite layers that each undergo their own unique deformation mechanisms, a unique spatial functional form of mechanical properties with regions of differing levels of gradation within and between material layers, and layers with an undetectable gradation, load-dependent effective material properties, circumferential surface cracking, orthogonal microcracking in laminated sublayers and geometrically corrugated junctions between layers.