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仿生框架诱导矿化制备多功能人工珍珠母

Multifunctional artificial nacre via biomimetic matrix-directed mineralization

  • 摘要: 天然珍珠母具备精巧的跨尺度多级结构和优异的力学性能,是目前研究最多的生物结构材料之一,它为高断裂韧性的人工结构陶瓷的设计和制造提供了灵感。然而,为了满足多样化的应用需求,先进结构材料除了要具备优异的机械性能(如强度、硬度和韧性)外,还必须具有多功能特性。本文基于框架诱导矿化方法制备了多种人工珍珠母,通过文石和纳米颗粒的共矿化将具有不同内在功能的纳米颗粒引入基元片中,除了增强的机械性能外,所获得的人工珍珠母材料还根据纳米粒子的类型表现出不同的功能。为了扩展该策略,还分析了具有不同尺寸和电性的纳米粒子对共矿化的影响。这种通用策略可以应用于其他类型的功能化仿生结构陶瓷的制备,这些陶瓷在生物医学等各个领域都有潜在的应用。

     

    Abstract: Natural nacre, one of the most studied biological structural materials with delicate hierarchical structures and extraordinary performance, has inspired the design and fabrication of artificial structural ceramics with high fracture toughness. However, to meet the diverse requirements of different applications, future structural materials must be multifunctional with superior mechanical properties, such as strength, hardness, and toughness. Herein, based on the matrix-directed mineralization method for producing biomimetic structural materials, we introduce nanoparticles with different inherent functions into the platelets of artificial nacre via the co-mineralization of aragonite and the nanoparticles. Besides their enhanced mechanical properties, the obtained artificial nacre materials also exhibit different functions depending on the type of the nanoparticles. To extend the versatility of this strategy, the effects of nanoparticles of different sizes and zeta potentials on mineralization are also analyzed. This universal strategy can be applied to the fabrication of other types of functionalized biomimetic structural ceramics that have potential applications in various fields, such as biomedical science.

     

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