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Robust flexural performance and fracture behavior of TiO2 decorated densified bamboo as sustainable structural materials

Author

Listed:
  • Ziyu Ba

    (Beihang University)

  • Hongyun Luo

    (Beihang University
    Beihang University
    Beihang University)

  • Juan Guan

    (Beihang University
    Beihang University)

  • Jun Luo

    (Beihang University)

  • Jiajia Gao

    (Beihang University)

  • Sujun Wu

    (Beihang University)

  • Robert O. Ritchie

    (University of California)

Abstract

High-performance, fast-growing natural materials with sustainable and functional features currently arouse significant attention. Here, facile processing, involving delignification, in situ hydrothermal synthesis of TiO2 and pressure densification, is employed to transform natural bamboo into a high-performance structural material. The resulting TiO2-decorated densified bamboo exhibits high flexural strength and elastic stiffness, with both properties more than double that of natural bamboo. Real-time acoustic emission reveals the key role of the TiO2 nanoparticles in enhancing the flexural properties. The introduction of nanoscale TiO2 is found to markedly increase the degree of oxidation and the formation of hydrogen bonds in bamboo materials, leading to extensive interfacial failure between the microfibers, a micro-fibrillation process that results in substantial energy consumption and high fracture resistance. This work furthers the strategy of the synthetic reinforcement of fast-growing natural materials, which could lead to the expanded applications of sustainable materials for high-performance structural applications.

Suggested Citation

  • Ziyu Ba & Hongyun Luo & Juan Guan & Jun Luo & Jiajia Gao & Sujun Wu & Robert O. Ritchie, 2023. "Robust flexural performance and fracture behavior of TiO2 decorated densified bamboo as sustainable structural materials," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-36939-6
    DOI: 10.1038/s41467-023-36939-6
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    References listed on IDEAS

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    1. Jianwei Song & Chaoji Chen & Shuze Zhu & Mingwei Zhu & Jiaqi Dai & Upamanyu Ray & Yiju Li & Yudi Kuang & Yongfeng Li & Nelson Quispe & Yonggang Yao & Amy Gong & Ulrich H. Leiste & Hugh A. Bruck & J. Y, 2018. "Processing bulk natural wood into a high-performance structural material," Nature, Nature, vol. 554(7691), pages 224-228, February.
    2. Kang Yang & Juan Guan & Keiji Numata & Change Wu & Sujun Wu & Zhengzhong Shao & Robert O. Ritchie, 2019. "Integrating tough Antheraea pernyi silk and strong carbon fibres for impact-critical structural composites," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
    3. Wentao Gan & Chaoji Chen & Hyun-Tae Kim & Zhiwei Lin & Jiaqi Dai & Zhihua Dong & Zhan Zhou & Weiwei Ping & Shuaiming He & Shaoliang Xiao & Miao Yu & Liangbing Hu, 2019. "Single-digit-micrometer thickness wood speaker," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
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