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Super-tough double-network hydrogels reinforced by covalently compositing with silica-nanoparticles
Abstract
We have successfully developed hydrogels with high compressive toughness by reinforcing the double-network structure (PAMPS/PAAm) with grafted silica nanoparticles. Silica nanoparticles grafted with vinyl end groups were used as macro-crosslinkers to copolymerize with AMPS, yielding a nanocomposite first network. Subsequent introduction of a secondary PAAm network resulted in super-tough double-network (DN) composite hydrogels, which do not fracture upon loading up to 73 MPa and a strain above 0.98. The compressive strength, swelling behavior, and morphology of the silica-grafted DN hydrogels were investigated as functions of nanoparticle content and particle size, in comparison with silica nanoparticle-filled DN gels without covalent bonding to the polymer network. Maximal reinforcement of the DN gels was achieved at around 1 wt% (weight percent) of grafted silica nanoparticles with respect to AMPS. Unique embedded micro-network structures were observed in the silica-grafted DN gels and accounted for the substantial improvement in compressive toughness. The fracture mechanism is discussed in detail based on the yielding behavior of these covalently composited hydrogels.
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Citations
Cited by
Multi-scale multi-mechanism design of tough hydrogels: building dissipation into stretchy networks
Zhao, X. (2014) · Soft Matter · doi:10.1039/c3sm52272e · Cited by 1,252
Thoniyot, P., Tan, M. J., Karim, A. A., Young, D. J., & Loh, X. J. (2015) · Advanced Science · doi:10.1002/advs.201400010 · Cited by 928
Fundamentals of double network hydrogels
Chen, Q., Chen, H., Zhu, L., & Zheng, J. (2015) · Journal of Materials Chemistry B · doi:10.1039/c5tb00123d · Cited by 657
From 3D to 4D printing: Approaches and typical applications
Zhou, Y., Huang, W. M., Kang, S. F., Wu, X. L., Lu, H. B., Fu, J., & Cui, H. (2015) · Journal of Mechanical Science and Technology · doi:10.1007/s12206-015-0925-0 · Cited by 224
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Metadata
- Authors
- Wang, Q., Hou, R., Cheng, Y., & Fu, J.
- Venue
- Soft Matter
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2012
- Volume
- 8
- Issue
- 22
- Pages
- 6048
- ISSN
- 1744-683X (ISSN-L)
- 1744-6848
- OpenAlex
- W2045336611
- Cited by
- 219
- References
- 0
- FWCI
- 7.72
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wang, Q., Hou, R., Cheng, Y., & Fu, J. (2012). Super-tough double-network hydrogels reinforced by covalently compositing with silica-nanoparticles. Soft Matter. https://doi.org/10.1039/c2sm07233e
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