Nanocomposite interpenetrating hydrogels with high toughness and good self-recovery


It is particularly desirable to fabricate highly tough hydrogels with excellent self-recoverable properties for applications where high stress is required. In this work, we prepared a tough, fast self-recoverable nanocomposite hydrogel by chemical cross-linking of acrylamide (AM) monomers with vinyl-modified silica nanoparticles (VSNPs), combined with physical cross-linking of polyvinyl alcohol (PVA). The uniaxial tensile test showed that the nanocomposite hydrogel has excellent mechanical properties. The maximum elongation at break was as high as 666%, and the tensile strength was as high as 1.68 MPa. Cyclic loading-unloading tests revealed the excellent self-healing properties of the nanocomposite hydrogel. It is worth noting that the nanocomposite hydrogel exhibited higher strength after two loading-unloading cycles, due to the orientation of the PVA when stretched. In addition, the effects of PVA, VSNPs, and AM concentrations, and the number of PVA freeze-thaw cycles and freezing duration on the mechanical properties of the hydrogels were investigated in detail.

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We acknowledge financial support from the National Nature Science Foundation of China (No. 21104040, 51473007, 31570575).

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Correspondence to Huijuan Zhang or Biao Yang.

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Zhang, H., Wang, X., Huang, H. et al. Nanocomposite interpenetrating hydrogels with high toughness and good self-recovery. Colloid Polym Sci 297, 821–830 (2019).

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  • PVA
  • Nanocomposite interpenetrating hydrogel
  • Toughness
  • Self-recovery
  • Draw-induced strengthening