Hydroxyapatite-reinforced alginate fibers with bioinspired dually aligned architectures

Fuqiang Wan, Hang Ping, Wenxuan Wang, Zhaoyong Zou, Hao Xie, Bao Lian Su, Dabiao Liu, Zhengyi Fu

Research output: Contribution to journalArticlepeer-review


Biological materials have excellent mechanical properties due to their organized structures from nano- to macro-scale. Artificial manufacture of materials with anisotropic microstructures still remains challenging. We described a stress-induced method to fabricate anisotropic alginate fibers. Organic-inorganic composite fibers were obtained by incorporating aligned hydroxyapatite (HAP) nanowires into the alginate fiber. Detailed structural characterization revealed the bone-like structure of the HAP-reinforced alginate fibers. Tensile test results showed that the maximum Young's modulus and tensile strength were 4.3 GPa and 153.8 MPa, respectively. A multiscale reinforcing mechanism is proposed after the discussion of the structure-property relationship: highly ordered and compacted nanofibrils aligned along the longitudinal direction at the microscale, and two kinds of alginate gels with different mechanical behaviors at the nanoscale coexisted (acidic alginate gel and calcium-alginate gel). This work validates the effectiveness of the bioinspired fabrication strategy, which inspires further manufacturing and optimization of materials for diverse applications.

Original languageEnglish
Article number118167
JournalCarbohydrate Polymers
Early online date7 May 2021
Publication statusPublished - 1 Sep 2021


  • Anisotropy
  • Bioinspired
  • Dual alignment
  • Hydroxyapatite
  • Sodium alginate
  • Spin-coating


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