Hierarchical Toughening of a Biomimetic Bulk Cement Composite

Pan, Hao; She, Wei; Zuo, Wenqiang; Zhou, Yang; Huang, Jiale; Zhang, Zhongwen; Geng, Zifan; Yao, Yiming; Zhang, Wenhua; Li, Zheng; Cai, Miao; Liu, Jiaping

doi:10.1021/acsami.0c15313

Cited by 39 publications

(15 citation statements)

References 56 publications

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“…(e) Flexural stress–strain curve of the PAC laminates. (f) Bending energy and strain comparison of the PAC laminates with natural nacre, , bone, , and other synthetic nacre-like composites. ,,,,− The detailed data is listed in Table S1 in the Supporting Information. (g) SEM image of the side view of a thin PAC laminate after being subject to a three-point bending test.…”

Section: Results and Discussionmentioning

confidence: 99%

A Bioinspired Ultratough Composite Produced by Integration of Inorganic Ionic Oligomers within Polymer Networks

Kong

Tang

et al. 2022

ACS Nano

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The nacre-inspired laminates are promising materials for their excellent mechanics. However, the interfacial defects between organic–inorganic phases commonly lead to the crack propagation and fracture failure of these materials under stress. A natural biomineral, bone, has much higher bending toughness than the nacre. The small size of inorganic building units in bone improves the organic–inorganic interaction, which optimizes the material toughness. Inspired by these biological structures, here, an ultratough nanocomposite laminate is prepared by the integration of ultrasmall calcium phosphate oligomers (CPO, 1 nm in diameter) within poly(vinyl alcohol) (PVA) and sodium alginate (Alg) networks through a simple three-step strategy. Owing to the small size of inorganic building units, strong multiple molecular interactions within integrated organic–inorganic hierarchical structure are built. The resulting laminates exhibit ultrahigh bending strain (>50% without fracture) and toughness (21.5–31.0 MJ m–3), which surpass natural nacre and almost all of the synthetic laminate materials that have been reported so far. Moreover, the mechanics of this laminate is tunable by changing the water content within the bulk structure. This work provides a way for the development of organic–inorganic nanocomposites with ultrahigh bending toughness by using inorganic ionic oligomers, which can be useful in the fields of tough protective materials and energy absorbing materials.

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Section: Results and Discussionmentioning

confidence: 99%

A Bioinspired Ultratough Composite Produced by Integration of Inorganic Ionic Oligomers within Polymer Networks

Kong

Tang

et al. 2022

ACS Nano

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“…Typical inspirations from nature are from either plants or animals [120]. Here, we give examples of wood (timber) (for functional demands) [121] and nacre or sea urchin spine (for mechanical demands) [122,123] inspired cement with enhanced properties.…”

Section: Bioinspired Materials Designmentioning

confidence: 99%

“…Wang et al designed a wood-inspired cement with high strength and multifunctionality based on the icetemplating technique [121]. This new cement is anisotropic, similar to natural wood, and is lightweight but also high strength.…”

Section: Bioinspired Materials Designmentioning

confidence: 99%

Materials-oriented integrated design and construction of structures in civil engineering—A review

Ming¹,

Huang²,

Li³

2022

Front. Struct. Civ. Eng.

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Design is a goal-oriented planning activity for creating products, processes, and systems with desired functions through specifications. It is a decision-making exploration: the design outcome may vary greatly depending on the designer’s knowledge and philosophy. Integrated design is one type of design philosophy that takes an interdisciplinary and holistic approach. In civil engineering, structural design is such an activity for creating buildings and infrastructures. Recently, structural design in many countries has emphasized a performance-based philosophy that simultaneously considers a structure’s safety, durability, serviceability, and sustainability. Consequently, integrated design in civil engineering has become more popular, useful, and important. Material-oriented integrated design and construction of structures (MIDCS) combine materials engineering and structural engineering in the design stage: it fully utilizes the strengths of materials by selecting the most suitable structural forms and construction methodologies. This paper will explore real-world examples of MIDCS, including the realization of MIDCS in timber seismic-resistant structures, masonry arch structures, long-span steel bridges, prefabricated/on-site extruded light-weight steel structures, fiber-reinforced cementitious composites structures, and fiber-reinforced polymer bridge decks. Additionally, advanced material design methods such as bioinspired design and structure construction technology of additive manufacturing are briefly reviewed and discussed to demonstrate how MIDCS can combine materials and structures. A unified strength-durability design theory is also introduced, which is a human-centric, interdisciplinary, and holistic approach to the description and development of any civil infrastructure and includes all processes directly involved in the life cycle of the infrastructure. Finally, this paper lays out future research directions for further development in the field.

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“…[ 12 ] Inspired by the natural nacre architecture, cement composites with “brick‐mud” structures significantly improved mechanical strength and toughness at the same time without aggravation in density. [ 2,13 ] However, mass‐produced building materials are required to minimize carbon footprints in the era of carbon control. Therefore, how to improve material efficiency to gain higher performance with less raw material is the critical challenge for the next generation of building materials.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Super Thermal Insulating, Strong and Low Carbon Cement Aerogel for Building Envelope

Zhu

Yang

et al. 2023

Advanced Science

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The energy crisis has arisen as the most pressing concern and top priority for policymakers, with buildings accounting for over 40% of global energy consumption. Currently, single‐function envelopes cannot satisfy energy efficiency for next‐generation buildings. Designing buildings with high mechanical robustness, thermal insulation properties, and more functionalities has attracted worldwide attention. Further optimization based on bioinspired design and material efficiency improvement has been adopted as effective approaches to achieve satisfactory performance. Herein, inspired by the strong and porous cuttlefish bone, a cement aerogel through self‐assembly of calcium aluminum silicate hydrate nanoparticles (C‐A‐S‐H, a major component in cement) in a polymeric solution as a building envelop is developed. The as‐synthesized cement aerogel demonstrates ultrahigh mechanical performance in terms of stiffness (315.65 MPa) and toughness (14.68 MJ m−3). Specifically, the highly porous microstructure with multiscale pores inside the cement aerogel greatly inhibits heat transfer, therefore achieving ultralow thermal conductivity (0.025 W m−1 K−1). Additionally, the inorganic C‐A‐S‐H nanoparticles in cement aerogel form a barrier against fire for good fire retardancy (limit oxygen index, LOI ≈ 46.26%, UL94‐V0). The versatile cement aerogel featuring high mechanical robustness, remarkable thermal insulation, light weight, and fire retardancy is a promising candidate for practical building applications.

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Hierarchical Toughening of a Biomimetic Bulk Cement Composite

Cited by 39 publications

References 56 publications

A Bioinspired Ultratough Composite Produced by Integration of Inorganic Ionic Oligomers within Polymer Networks

A Bioinspired Ultratough Composite Produced by Integration of Inorganic Ionic Oligomers within Polymer Networks

Materials-oriented integrated design and construction of structures in civil engineering—A review

Bioinspired Super Thermal Insulating, Strong and Low Carbon Cement Aerogel for Building Envelope

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