Strong fatigue-resistant nanofibrous hydrogels inspired by lobster underbelly

Jiahua Ni, Shaoting Lin, Zhao Qin, David Veysset, Xinyue Liu, Yuchen Sun, Alex J. Hsieh, Raul Radovitzky, Keith A. Nelson, Xuanhe Zhao

Research output: Contribution to journalArticlepeer-review

Abstract

Nanofibrous hydrogels are pervasive in animal and plant bodies and have been widely seen in engineering applications. Electrospinning is one of the most widely used methods for the fabrication of nanofibrous hydrogels. Whereas the biological nanofibrous hydrogels can maintain high strength and high toughness under multiple cycles of mechanical loads, such fatigue-resistant properties have not been achieved in electrospun nanofibrous hydrogels. Here, we report a bioinspired design of strong and fatigue-resistant nanofibrous hydrogels that can closely mimic the bouligand structure of the natural hydrogel in the lobster underbelly. The resultant nanofibrous hydrogel can reach high nominal strength up to 8.4 MPa and high fatigue threshold up to 770 J/m2. We further demonstrate the superior impact resistance of the bioinspired bouligand-type nanofibrous hydrogel with specific penetration energy of 40 kJ/kg. We show that it is critical to weld the interfaces between nanofibers and introduce intrinsically high-energy phases (nanocrystalline domains) into nanofibers.

Original languageEnglish (US)
Pages (from-to)1919-1934
Number of pages16
JournalMatter
Volume4
Issue number6
DOIs
StatePublished - Jun 2 2021

Keywords

  • MAP5: Improvement
  • bioinspiration
  • electrospinning
  • fatigue resistance
  • nanofibrous hydrogels

ASJC Scopus subject areas

  • Materials Science(all)

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