The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.
Hybrid Hydrogels with Extremely High Stiffness and Toughness
Open accessAbstract
The development of hydrogels for cartilage replacement and soft robotics has highlighted a challenge: load-bearing hydrogels need to be both stiff and tough. Several approaches have been reported to improve the toughness of hydrogels, but simultaneously achieving high stiffness and toughness remains difficult. Here we report that alginate-polyacrylamide hydrogels can simultaneously achieve high stiffness and toughness. We combine short- and long-chain alginates to reduce the viscosity of pregel solutions and synthesize homogeneous hydrogels of high ionic cross-link density. The resulting hydrogels can have elastic moduli of ∼1 MPa and fracture energies of ∼4 kJ m –2 . Furthermore, this approach breaks the inverse relation between stiffness and toughness: while maintaining constant elastic moduli, these hydrogels can achieve fracture energies up to ∼16 kJ m –2 . These stiff and tough hydrogels hold promise for further development as load-bearing materials.
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Self-citation
Metadata
- Authors
- Li, J., Illeperuma, W. R. K., Suo, Z., & Vlassak, J. J.
- Venue
- ACS Macro Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-05-19
- Volume
- 3
- Issue
- 6
- Pages
- 520-523
- ISSN
- 2161-1653 (ISSN-L)
- OpenAlex
- W2115504193
- Cited by
- 437
- References
- 38
- FWCI
- 12.82
- Type
- journal article
- Language
- en
- Open access
- green
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