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<p>The practical application of cement-based materials is often constrained by their inherent brittleness and low flexural strength. Although both microcrystalline cellulose (MCC) and graphene oxide (GO) show potential as reinforcing agents, achieving synergistic enhancement of compressive strength and flexural strength of cement-based materials remains an urgent problem to be solved. This study developed a novel GO-MCC composite (GOMCC) via a combined ultrasonic and chemical modification approach, aiming to achieve a synergistic reinforcement effect. Characterization techniques (FTIR, TEM, XRD, DLS) confirmed the successful formation of the composite between MCC and GO, which effectively inhibited agglomeration and enhanced interfacial bonding. When incorporated into cement paste at a dosage of 1.0&#xa0; wt.‰, the GOMCC-2 composite (GO: MCC = 3:100) significantly improved the flexural strength, with increases of 18.2%, 14.6%, and 26.4% at 3, 7, and 28&#xa0;days, respectively. Microstructural and hydration analysis (BET, SEM, XRD, isothermal calorimetry) revealed that the oxygen-containing functional groups of GO and the hydroxyl groups of MCC acted synergistically to strengthen the interfacial bonding with cement hydration products (C–S–H gel). Furthermore, the GOMCC composite served as a nucleation site for hydration products, promoting the formation of a denser microstructure with a refined pore structure, and contributed to crack-bridging effects, thereby effectively enhancing the mechanical properties of the cement-based material.</p>

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Mechanical properties and microstructure of cellulose and graphene oxide composite cement-based materials

  • 期刊论文

  • 发表日期：

    2026年5月9日

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  • Hong Zhou,
  • Shuzhen Zheng,
  • Chunhua Zhou,
  • Jianfeng Ma

摘要

The practical application of cement-based materials is often constrained by their inherent brittleness and low flexural strength. Although both microcrystalline cellulose (MCC) and graphene oxide (GO) show potential as reinforcing agents, achieving synergistic enhancement of compressive strength and flexural strength of cement-based materials remains an urgent problem to be solved. This study developed a novel GO-MCC composite (GOMCC) via a combined ultrasonic and chemical modification approach, aiming to achieve a synergistic reinforcement effect. Characterization techniques (FTIR, TEM, XRD, DLS) confirmed the successful formation of the composite between MCC and GO, which effectively inhibited agglomeration and enhanced interfacial bonding. When incorporated into cement paste at a dosage of 1.0  wt.‰, the GOMCC-2 composite (GO: MCC = 3:100) significantly improved the flexural strength, with increases of 18.2%, 14.6%, and 26.4% at 3, 7, and 28 days, respectively. Microstructural and hydration analysis (BET, SEM, XRD, isothermal calorimetry) revealed that the oxygen-containing functional groups of GO and the hydroxyl groups of MCC acted synergistically to strengthen the interfacial bonding with cement hydration products (C–S–H gel). Furthermore, the GOMCC composite served as a nucleation site for hydration products, promoting the formation of a denser microstructure with a refined pore structure, and contributed to crack-bridging effects, thereby effectively enhancing the mechanical properties of the cement-based material.