Quantification of Nanocomposite Dispersion for Weakly Correlated Systems

POSTER

Abstract

Nanocomposites such as carbon black dispersions in elastomers can be describe by a mean-field approach and the RPA equation. [1,2] However, dispersion of nanoparticles influenced by surface potentials or entropic and steric interactions, such as for surface-grafted nanoparticles, often cannot be described using the mean-field approach since the particles are weakly organized. For these cases it is necessary to consider a discrete correlation function and an associated structure factor in scattering. Recently Oberdisse and Genix [3] have developed an approach to model scattering from nanocomposites of precipitated silica in elastomers. In this talk an approach similar to Oberdisse is used but with a simpler structure factor based on the Born-Green approach of Guinier and Fournet. [4] The result is a simple parameterization of correlations that can be used to determine the second virial coefficient for direct comparison with uncorrelated systems such as fumed silica or carbon black in elastomers.
1 Vogtt, K. et al. Soft Matter 2017.
2 Pedersen, J. S. et al. Progr Colloid Polym Sci 2005, 130, 70–78.
3 Baeza, G. P. et al. Macromolecules 2013, 46 (1), 317–329.
4 Guinier, A.; Fournet, G. Small-Angle Scattering Of X-Rays; John Wiley & Sons, 1955.

Presenters

  • Alex McGlasson

    Chemical and Materials Engineering, University of Cincinnati, University of Cincinnati

Authors

  • Alex McGlasson

    Chemical and Materials Engineering, University of Cincinnati, University of Cincinnati

  • Greg Beaucage

    Dept. Chem. and Mat. Eng, University of Cincinnati, OH, Chemical and Materials Engineering, University of Cincinnati, University of Cincinnati

  • Michael Chauby

    Dept. Chem. and Mat. Eng, University of Cincinnati, OH, Chemical and Materials Engineering, University of Cincinnati, University of Cincinnati

  • Kabir Rishi

    Dept. Chem. and Mat. Eng, University of Cincinnati, OH, Chemical and Materials Engineering, University of Cincinnati, University of Cincinnati

  • Vikram K Kuppa

    University of Dayton Research Institute, University of Dayton, OH, Nonstructural Materials Division, University of Dayton Research Institute, University of Dayton Research Institute, Nonstructural Materials Division, University of Dayton, University of Dayton Research Institute