Innovative barnacle-inspired organic–inorganic hybrid magnesium oxychloride cement composites with exceptional mechanical strength and water resistance

IF 23.2 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Cheng Li, Na Zhou, Panrong Guo, Miao Li, Fei Wang, Jiongjiong Li, Yufei Han, Zhigang Wu, Wenjie Lu
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Abstract

In response to the growing demand for energy conservation, emission reduction, and carbon neutrality in the building industry, the development of high-strength, low-carbon, and environmentally friendly magnesium oxychloride cement (MOC) as a replacement for traditional Portland cement is of great significance. However, MOC possesses inherent limitations, such as low strength and poor water resistance, which restrict its application in construction and wood adhesives. To overcome these challenges, we developed a biomimetic organic–inorganic hybrid cement material (MOC-TA-AS), inspired by the adhesion mechanism of marine barnacles. Tannic acid (TA) and acorn powder (AS) were incorporated as organic components to provide additional active sites for Mg2+ ions in MOC, forming a stable double-chelate network. The MOC-TA-AS composite showed significant improvements over MOC-based materials, including a 14% increase in compressive strength (109.79 MPa after 28 days of curing) and a 57.8% improvement in water resistance coefficient compared to the control. After water immersion, the content of the 5-phase increased by 72.8% (MOC-AS/1.5-TA/0.8), while the Mg(OH)2 content decreased by 25.8%. These improvements are attributed to the weak acidity and catechol structure of tannic acid, which promote the formation of a gel-like 5-phase structure. Additionally, the large dendritic starch structure of acorn powder, in conjunction with tannic acid, helped create a chelating network. The protective coating provided by TA and AS to the 5-phase products, along with their chelation with Mg2+ ions, was also investigated. This research provides an effective approach to enhancing MOC cement materials and offers a feasible strategy for developing high-performance, eco-friendly building materials for practical applications.

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来源期刊
CiteScore
26.00
自引率
21.40%
发文量
185
期刊介绍: Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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