Defect-tolerant nanocomposites through bio-inspired stiffness modulation

Allison Michelle Beese, Zhi An, Sourangsu Sarkar, S. Shiva P. Nathamgari, Horacio D. Espinosa, Sonbinh T. Nguyen

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A biologically inspired, multilayer laminate structural design is deployed into nanocomposite films of graphene oxide-poly(methyl methacrylate) (GO-PMMA). The resulting multilayer GO-PMMA films show greatly enhanced mechanical properties compared to pure-graphene-oxide films, with up to 100% increases in stiffness and strength when optimized. Notably, a new morphology is observed at fracture surfaces: whereas pure-graphene-oxide films show clean fracture surfaces consistent with crack initiation and propagation perpendicular to the applied tensile load, the GO-PMMA multilayer laminates show terracing consistent with crack stopping and deflection mechanisms. As a consequence, these macroscopic GO-PMMA films become defect-tolerant and can maintain their tensile strengths as their sample volumes increase. Linear elastic fracture analysis supports these observations by showing that the stiffness modulation introduced by including PMMA layers within a graphene oxide film can act to shield or deflect cracks, thereby delaying failure and allowing the material to access more of its inherent strength. Together, these data clearly demonstrate that desirable defect-tolerant traits of structural biomaterials can indeed be incorporated into graphene- oxide-based nanocomposites.

Original languageEnglish (US)
Pages (from-to)2883-2891
Number of pages9
JournalAdvanced Functional Materials
Volume24
Issue number19
DOIs
StatePublished - May 21 2014

Fingerprint

Graphite
Graphene
stiffness
Nanocomposites
nanocomposites
graphene
Stiffness
Modulation
Polymethyl Methacrylate
modulation
Defects
Oxides
defects
Polymethyl methacrylates
polymethyl methacrylate
oxides
Oxide films
oxide films
Multilayers
laminates

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Beese, A. M., An, Z., Sarkar, S., Nathamgari, S. S. P., Espinosa, H. D., & Nguyen, S. T. (2014). Defect-tolerant nanocomposites through bio-inspired stiffness modulation. Advanced Functional Materials, 24(19), 2883-2891. https://doi.org/10.1002/adfm.201303503
Beese, Allison Michelle ; An, Zhi ; Sarkar, Sourangsu ; Nathamgari, S. Shiva P. ; Espinosa, Horacio D. ; Nguyen, Sonbinh T. / Defect-tolerant nanocomposites through bio-inspired stiffness modulation. In: Advanced Functional Materials. 2014 ; Vol. 24, No. 19. pp. 2883-2891.
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Beese, AM, An, Z, Sarkar, S, Nathamgari, SSP, Espinosa, HD & Nguyen, ST 2014, 'Defect-tolerant nanocomposites through bio-inspired stiffness modulation', Advanced Functional Materials, vol. 24, no. 19, pp. 2883-2891. https://doi.org/10.1002/adfm.201303503

Defect-tolerant nanocomposites through bio-inspired stiffness modulation. / Beese, Allison Michelle; An, Zhi; Sarkar, Sourangsu; Nathamgari, S. Shiva P.; Espinosa, Horacio D.; Nguyen, Sonbinh T.

In: Advanced Functional Materials, Vol. 24, No. 19, 21.05.2014, p. 2883-2891.

Research output: Contribution to journalArticle

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