Effect of the orientation of graphene-based nanoplatelets upon the Young's modulus of nanocomposites
By Zheling Li, R. Young, N. Wilson, I. Kinloch, C. Vallés, Zheng Li. 2016
181 citations recorded by the source corpus.
Abstract The spatial orientation of the reinforcing elements in polymer-based composites plays a vital role in controlling mechanical properties but there is no generally-accepted way of quantifying the spatial orientation at the nanoscale of plate-like fillers in nanocomposites. A previous study found that the intensity of scattering of the Raman band is dependent on the axis of laser polarization when the laser beam is parallel to the surface of the graphene plane and demonstrated that this could be used to quantify the spatial orientation of the graphene. Based on this approach, polarized Raman spectroscopy is used here to quantify, as an example, the level of spatial orientation of graphene oxide (GO) flakes in different nanocomposites. Furthermore, the spatial orientation of nanoplatelets is quantitatively linked to the stress transfer to the reinforcement in nanocomposites and, in particular, a method for determining the Krenchel orientation factor for these plate-like fillers directly from the Raman data is demonstrated. This approach is employed to estimate the effective Young's modulus of the reinforcement in graphene-based nanocomposites.
Subfields: Materials Chemistry, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/d5c88cde231cea6632811a4d10839b1dd0502047
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In Materials Chemistry
In Polymers and Plastics
Citations in the corpus
- Mechanical properties of graphene and graphene-based nanocomposites (2017, background): “In two recent reports from our group [319,320], the Krenchel factor for 3D randomly oriented nanoplatelets was calculated and quantitative determination of the spatial orientation of graphene in a nanocomposite was undertaken.”
- A review on the mechanical and thermal properties of graphene and graphene-based polymer nanocomposites: understanding of modelling and MD simulation (2020, background): “[127] studied about the geometrical factors that affect the micromechanics of deformation graphene reinforced composites.”
- Multifunctional epoxy nanocomposites reinforced by two-dimensional materials: A review (2021, background): “where Vf and Vm (V% + V& = 1) are the volume fractions of the filler and the matrix, Em is the modulus of the matrix and Eeff is the effective modulus of the filler, ηo is the Krenchel orientation factor (ηo = 1 for aligned nanosheets and 8/15 for randomly oriented ones [58]), and ηl is the length e”