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Hierarchically aligned heterogeneous core-sheath hydrogels

Author

Listed:
  • Zhao Xu

    (Hefei University of Technology)

  • Hong Chen

    (Hefei University of Technology)

  • Huai-Bin Yang

    (Southern University of Science and Technology
    University of Science and Technology of China)

  • Xin Yao

    (Hefei University of Technology)

  • Haili Qin

    (Hefei University of Technology)

  • Huai-Ping Cong

    (Hefei University of Technology)

  • Shu-Hong Yu

    (Southern University of Science and Technology
    University of Science and Technology of China)

Abstract

Natural materials with highly oriented heterogeneous structures are often lightweight but strong, stiff but tough and durable. Such an integration of diverse incompatible mechanical properties is highly desired for man-made materials, especially weak hydrogels which are lack of high-precision structural design. Herein, we demonstrate the fabrication of hierarchically aligned heterogeneous hydrogels consisting of a compactly crosslinked sheath and an aligned porous core with alignments of nanofibrils at multi-scales by a sequential self-assembly assisted salting out method. The produced hydrogel offers ultrahigh mechanical properties among the reported hydrogels, elastomers and natural materials, including a toughness of 1031 MJ · m-3, strength of 55.3 MPa, strain of 3300%, stiffness of 6.8 MPa, fracture energy of 552.7 kJ · m-2 and fatigue threshold of 40.9 kJ · m-2. Furthermore, such a tough and strong hydrogel facilely achieves stable regeneration and rapid adhesion owing to the highly crystallized and aligned network structure. The regenerated specimen presents the reinforced strength, toughness and fatigue resistance over 10 regeneration cycles. This work provides a simple method to produce hydrogels with bioinspired heterostructures and combinational properties for real applications.

Suggested Citation

  • Zhao Xu & Hong Chen & Huai-Bin Yang & Xin Yao & Haili Qin & Huai-Ping Cong & Shu-Hong Yu, 2025. "Hierarchically aligned heterogeneous core-sheath hydrogels," Nature Communications, Nature, vol. 16(1), pages 1-14, December.
  • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-024-55677-x
    DOI: 10.1038/s41467-024-55677-x
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    References listed on IDEAS

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    1. Bongjun Yeom & Trisha Sain & Naida Lacevic & Daria Bukharina & Sang-Ho Cha & Anthony M. Waas & Ellen M. Arruda & Nicholas A. Kotov, 2017. "Abiotic tooth enamel," Nature, Nature, vol. 543(7643), pages 95-98, March.
    2. Jeong-Yun Sun & Xuanhe Zhao & Widusha R. K. Illeperuma & Ovijit Chaudhuri & Kyu Hwan Oh & David J. Mooney & Joost J. Vlassak & Zhigang Suo, 2012. "Highly stretchable and tough hydrogels," Nature, Nature, vol. 489(7414), pages 133-136, September.
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