Multi-scale design of the structure and mechanical performance of the deep-sea hydrothermal mussel (Bathymodiolus aduloides) shell

IF 3.5 2区医学 Q2 ENGINEERING, BIOMEDICAL

Journal of the Mechanical Behavior of Biomedical Materials Pub Date : 2025-09-05 DOI:10.1016/j.jmbbm.2025.107188

Xue Hou , Yin Liu , Tingting Zheng , Zhi Zheng , Jianhui Sun , Mengjun Xiong , Wenting Li , Jianbao Li , Shenghua Mei , Yabin Yuan , Shuangquan Liao

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引用次数: 0

Abstract

Deep-sea hydrothermal vents are renowned for being among the most extreme environments on Earth. However, the mussel shells found in these vent sites demonstrate remarkable productivity, despite being subjected to high pressure as well as unusual levels of heavy metals, pH, temperature, CO₂, and sulphides. To comprehend how these mussels endure such extreme conditions, a systematic comparative study was conducted, focusing on the unique chemical composition, structural designs, and mechanical properties of hydrothermal vent mussels (Bathymodiolus aduloides) in comparison to shallow-water mussels (Mytilus edulis). The results revealed that the shell of B. aduloides exhibited a multilayered structure and a higher curved cross section compared to M. edulis. The cross section primarily consisted of a thicker periostracum layer and a highly mineralized calcium carbonate layer, exhibiting distinct changes in chemical composition and microstructures. Furthermore, the shell of B. aduloides demonstrated higher modulus and toughness, as well as lower density and hardness, when compared to the shell of M. edulis. Various toughening mechanisms of B. aduloides were observed on broken surfaces, including crack deflection, mineral bridges, and nano-particles. The chemical composition and multiscale design strategy of the B. aduloides shell, as revealed in this study, are expected to provide valuable insights for the development of novel bioinspired materials suitable for extremely high-pressure environments, such as deep-sea submersibles and mining equipment.

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深海热液贻贝（Bathymodiolus aduloides）壳结构与力学性能的多尺度设计

深海热液喷口以地球上最极端的环境而闻名。然而，在这些喷口处发现的贻贝壳显示出惊人的生产力，尽管受到高压以及不同寻常的重金属、pH值、温度、二氧化碳和硫化物的影响。为了了解这些贻贝是如何忍受这种极端条件的，我们进行了系统的比较研究，重点是将热液口贻贝（Bathymodiolus aduloides）与浅水贻贝（Mytilus edulis）的独特化学成分、结构设计和力学性能进行比较。结果表明，与毛竹相比，双歧杆菌的壳呈多层结构，且弯曲截面更高。横截面主要由较厚的骨膜层和高度矿化的碳酸钙层组成，化学成分和微观结构变化明显。此外，aduloides壳的模量和韧性高于M. edulis，密度和硬度低于M. edulis。在断裂表面上观察到多种增韧机制，包括裂纹偏转、矿物桥和纳米颗粒。本研究揭示的B. aduloides壳的化学成分和多尺度设计策略，有望为开发适用于极高压环境（如深海潜水器和采矿设备）的新型生物启发材料提供有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the Mechanical Behavior of Biomedical Materials 工程技术-材料科学：生物材料

CiteScore

7.20

自引率

7.70%

发文量

505

审稿时长

46 days

期刊介绍： The Journal of the Mechanical Behavior of Biomedical Materials is concerned with the mechanical deformation, damage and failure under applied forces, of biological material (at the tissue, cellular and molecular levels) and of biomaterials, i.e. those materials which are designed to mimic or replace biological materials. The primary focus of the journal is the synthesis of materials science, biology, and medical and dental science. Reports of fundamental scientific investigations are welcome, as are articles concerned with the practical application of materials in medical devices. Both experimental and theoretical work is of interest; theoretical papers will normally include comparison of predictions with experimental data, though we recognize that this may not always be appropriate. The journal also publishes technical notes concerned with emerging experimental or theoretical techniques, letters to the editor and, by invitation, review articles and papers describing existing techniques for the benefit of an interdisciplinary readership.