Multiparameter Structural Optimization of Single-Walled Carbon Nanotube Composites: Toward Record Strength, Stiffness, and Toughness

The typical mechanical properties of known SWNT composites, such as strength, stiffness, and toughness, are assessed in an introductory survey where we focused on concrete numerical parameters characterizing mechanical properties

Bong Sup Shim; Jian Zhu; Edward Jan; Kevin Critchley; Szushen Ho; Paul Podsiadlo; Kai Sun; Nicholas A. Kotov

2009

Scholarcy highlights

  • Efficient coupling of mechanical properties of SWNTs with the matrix leading to the transfer of unique mechanical properties of SWNTs to the macroscopic composites is a tremendous challenge of today’s materials science
  • The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online
  • The typical mechanical properties of known SWNT composites, such as strength, stiffness, and toughness, are assessed in an introductory survey where we focused on concrete numerical parameters characterizing mechanical properties
  • SWNT nanocomposites were made here by layer-by-layer assembly with poly(vinyl alcohol), and the first example of optimization in respect to key parameters determining the connectivity at the graphene−polymer interface, namely, degree of SWNT oxidation and cross-linking chemistry, was demonstrated
  • The resulting SWNT−PVA composites demonstrated tensile strength = 504.5 ± 67.3 MPa, stiffness = 15.6 ± 3.8 GPa, and toughness = 121.2 ± 19.2 J/g with maximum values recorded at σult = 600.1 MPa, E = 20.6 GPa, and K = 152.1 J/g
  • Our observation suggests that the strengthening and toughening mechanism originates from the synergistic combination of high degree of SWNT exfoliation, efficient SWNT−PVA binding, crack surface roughening, and fairly efficient distribution of local stress over the SWNT network
  • Such files may be downloaded by article for research use

Need more features? Save interactive summary cards to your Scholarcy Library.