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<p>Enhancing the toughness of cement-based materials is key to extending their service life, reducing carbon emissions, and achieving sustainable development of the building materials industry. Drawing inspiration from the biomineralization in nature, a novel hydrogel-cement composite with an interpenetrating organic-inorganic structure was developed, followed by a rapid polymerization to pre-construct a continuous organic network, and a sequential deposition of inorganic cement hydrates on that, in order, thereby endowing the obtained composites with a honeycomb-like porous structure. Compared with normal cement paste, the hydrogel-cement composites (hydrogel content: 2.4–13.7 <i>wt</i>%) showed more than 30 times higher flexural toughness, and 60% increase in compressive strength. Besides, the composites exhibited high porosity characteristics consisting of closed micropores, which contributed to the 90% lower thermal conductivity of the composites than normal cement paste. In conclusion, these findings open a new window to toughen and functionalize cement-based materials with hydrogels using a biomineralization-inspired strategy.</p>

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Toward tough and sustainable hydrogel-cement composites via biomineralization-inspired strategy

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月3日

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  • Han Wang,
  • Yanchun Miao,
  • Taotao Feng,
  • Junlin Lin,
  • Guoxing Sun,
  • Zeyu Lu,
  • Jinyang Jiang

摘要

Enhancing the toughness of cement-based materials is key to extending their service life, reducing carbon emissions, and achieving sustainable development of the building materials industry. Drawing inspiration from the biomineralization in nature, a novel hydrogel-cement composite with an interpenetrating organic-inorganic structure was developed, followed by a rapid polymerization to pre-construct a continuous organic network, and a sequential deposition of inorganic cement hydrates on that, in order, thereby endowing the obtained composites with a honeycomb-like porous structure. Compared with normal cement paste, the hydrogel-cement composites (hydrogel content: 2.4–13.7 wt%) showed more than 30 times higher flexural toughness, and 60% increase in compressive strength. Besides, the composites exhibited high porosity characteristics consisting of closed micropores, which contributed to the 90% lower thermal conductivity of the composites than normal cement paste. In conclusion, these findings open a new window to toughen and functionalize cement-based materials with hydrogels using a biomineralization-inspired strategy.