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Highly stretchable, self-adhesive, and self-healable double network hydrogel based on alginate/polyacrylamide with tunable mechanical properties

Pourjavadi, A ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1002/pol.20200295
  3. Publisher: John Wiley and Sons Inc , 2020
  4. Abstract:
  5. A number of synthetic hydrogels suffer from low mechanical strength. Despite of the recent advances in the fabrication of tough hydrogels, it is still a great challenge to simultaneously construct high stretchability, and self-adhesive and self-healing capability in a hydrogel. Herein, a new type of double network hydrogel was prepared based on irreversible cross-linking of polyacrylamide chains and Schiff-base reversible cross-linking between glycidyl methacrylate-grafted ethylenediamine and oxidized sodium alginate (OSA). The combination of both cross-linkings and their synergistic effect provided a novel hydrogel with high strength, stretchable, rapid self-healing, and self-adhesiveness to different material. Besides, the hydrogels with diverse OSA content could maintain their original shapes after loading–unloading tensile test. The resulting hydrogel has a great potential in various fields for supporting and load-bearing substance. © 2020 Wiley Periodicals LLC
  6. Keywords:
  7. Double network hydrogels ; Mechanical strength ; Schiff base interactions ; Self-healing ; Acrylic monomers ; Adhesives ; Mechanical properties ; Self-healing materials ; Sodium alginate ; Tensile testing ; Unloading ; Double-network hydrogels ; Ethylene diamine ; Glycidyl methacrylate ; High strength ; Polyacrylamide chains ; Self-adhesive ; Self-healing capabilities ; Synergistic effect ; Hydrogels
  8. Source: Journal of Polymer Science ; Volume 58, Issue 15 , 2020 , Pages 2062-2073
  9. URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/pol.20200295