Printing nature: Unraveling the role of nacre's mineral bridges

Gu, Grace X.; Libonati, Flavia; Wettermark, Susan; Buehler, Markus J.

doi:10.1016/j.jmbbm.2017.05.007

Cited by 133 publications

(74 citation statements)

References 36 publications

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“…At the microstructural level, 3D printed materials inspired by nacre and bone have been tested to better understand their fracture toughness,12c,144 impact resistance, and energy dissipation mechanisms . A 3D printed nacre‐inspired composite showed that the mineral bridges in nacre play an important role in maintaining stiffness and improving toughness . In addition, the incorporation of an additional level of hierarchy in a nacre‐inspired design is demonstrated, shown in Figure d–g, with an improved impact resistance in an higher level of hierarchy sample …”

Section: Bioinspired Designs At Different Length‐scalesmentioning

confidence: 99%

Multiscale Toughening Mechanisms in Biological Materials and Bioinspired Designs

et al. 2019

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Biological materials found in Nature such as nacre and bone are well recognized as light-weight, strong, and tough structural materials. The remarkable toughness and damage tolerance of such biological materials are conferred through hierarchical assembly of their multiscale (i.e., atomicto macroscale) architectures and components. Herein, the toughening mechanisms of different organisms at multilength scales are identified and summarized: macromolecular deformation, chemical bond breakage, and biomineral crystal imperfections at the atomic scale; biopolymer fibril reconfiguration/deformation and biomineral nanoparticle/nanoplatelet/ nanorod translation, and crack reorientation at the nanoscale; crack deflection and twisting by characteristic features such as tubules and lamellae at the microscale; and structure and morphology optimization at the macroscale. In addition, the actual loading conditions of the natural organisms are different, leading to energy dissipation occurring at different time scales. These toughening mechanisms are further illustrated by comparing the experimental results with computational modeling. Modeling methods at different length and time scales are reviewed. Examples of biomimetic designs that realize the multiscale toughening mechanisms in engineering materials are introduced. Indeed, there is still plenty of room mimicking the strong and tough biological designs at the multilength and time scale in Nature.

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Section: Bioinspired Designs At Different Length‐scalesmentioning

confidence: 99%

Multiscale Toughening Mechanisms in Biological Materials and Bioinspired Designs

et al. 2019

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“…The mineral platelets in this structure impart high strength whereas the organic mortar acts as compliant layer to create ductility by permitting platelet sliding which dissipates locally high stresses. To maintain strength, such sliding is limited to a few micrometers by such mechanisms as frictional resistance from the surface roughness of the platelets, the tensile/shear resistance of the biopolymer interphase, the presence of preexisting interlayer bridges, and in certain species the dovetail geometry of the platelets . Toughening is generated extrinsically, primarily by crack bridging leading to brick pull‐out and crack‐path deflection, to an extent that the fracture toughness of nacre (in energy terms) is several thousand times higher than that of its constituents.…”

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confidence: 99%

Bioinspired Nacre‐Like Alumina with a Metallic Nickel Compliant Phase Fabricated by Spark‐Plasma Sintering

Wat

Ferraro

Deng

et al. 2019

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The remarkable damage-tolerance found in natural materials is developed through functional, multiscale architectures with structural gradients and graded interfaces. [1][2][3][4][5][6] One notable example is nacre, which comprises ceramic (mineral) platelets of polycrystalline aragonite (≈95% by volume) bonded by biopolymers in a "brick-and-mortar" structure. [1,3,7] The Many natural materials present an ideal "recipe" for the development of future damage-tolerant lightweight structural materials. One notable example is the brick-and-mortar structure of nacre, found in mollusk shells, which produces high-toughness, bioinspired ceramics using polymeric mortars as a compliant phase. Theoretical modeling has predicted that use of metallic mortars could lead to even higher damage-tolerance in these materials, although it is difficult to melt-infiltrate metals into ceramic scaffolds as they cannot readily wet ceramics. To avoid this problem, an alternative ("bottomup") approach to synthesize "nacre-like" ceramics containing a small fraction of nickel mortar is developed. These materials are fabricated using nickelcoated alumina platelets that are aligned using slip-casting and rapidly sintered using spark-plasma sintering. Dewetting of the nickel mortar during sintering is prevented by using NiO-coated as well as Ni-coated platelets. As a result, a "nacre-like" alumina ceramic displaying a resistance-curve toughness up to ≈16 MPa m ½ with a flexural strength of ≈300 MPa is produced. Ceramic-Metal Composites www.advancedsciencenews.com

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Section: Bioinspired Mechanics Reinforced Structures By 3d Printingmentioning

confidence: 99%

Recent Progress in Biomimetic Additive Manufacturing Technology: From Materials to Functional Structures

et al. 2018

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Nature has developed high-performance materials and structures over millions of years of evolution and provides valuable sources of inspiration for the design of next-generation structural materials, given the variety of excellent mechanical, hydrodynamic, optical, and electrical properties. Biomimicry, by learning from nature's concepts and design principles, is driving a paradigm shift in modern materials science and technology. However, the complicated structural architectures in nature far exceed the capability of traditional design and fabrication technologies, which hinders the progress of biomimetic study and its usage in engineering systems. Additive manufacturing (three-dimensional (3D) printing) has created new opportunities for manipulating and mimicking the intrinsically multiscale, multimaterial, and multifunctional structures in nature. Here, an overview of recent developments in 3D printing of biomimetic reinforced mechanics, shape changing, and hydrodynamic structures, as well as optical and electrical devices is provided. The inspirations are from various creatures such as nacre, lobster claw, pine cone, flowers, octopus, butterfly wing, fly eye, etc., and various 3D-printing technologies are discussed. Future opportunities for the development of biomimetic 3D-printing technology to fabricate next-generation functional materials and structures in mechanical, electrical, optical, and biomedical engineering are also outlined.

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Printing nature: Unraveling the role of nacre's mineral bridges

Cited by 133 publications

References 36 publications

Multiscale Toughening Mechanisms in Biological Materials and Bioinspired Designs

Multiscale Toughening Mechanisms in Biological Materials and Bioinspired Designs

Bioinspired Nacre‐Like Alumina with a Metallic Nickel Compliant Phase Fabricated by Spark‐Plasma Sintering

Recent Progress in Biomimetic Additive Manufacturing Technology: From Materials to Functional Structures

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