Nanocomposites and nanostructured materials

clay1Nanocomposites from biodegradable polymers are produced by melt mixing and are subjected to  rheological, mechanical and thermal analyses. Properties are modeled by using a percolation theory approach. Nanocomposites proved to be optimal material for foaming, since the nanometric filler does not reduce the deformability of the polymeric matrix while enhancing the elongational and mechanical properties. Concurrent nucleation effects on both the bubble formation and the crystalline phase formation have been evidenced and analyzed, proving some selectivity of the additive in the crystal and the bubble nucleation.

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Ref. Ernesto Di Maio@

 

The dynamics of various kinds of nanoparticles in polymer melts is studied and modeled by resorting to viscoelastic analysis. The attention is focused on nanoparticle flocculation and networking. The effect of filler size and shape, matrix rheology and processing conditions are thoroughly investigated looking for possible unifying descriptions. Analogies with low-viscosity systems such as colloidal suspensions are also highlighted.

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Selected publications

  • M. Salzano de Luna, L. Pellegrino, M. Daghetta, C. V. Mazzocchia, D. Acierno, G. Filippone, “Importance of the morphology and structure of the primary aggregates for the dispersibility of carbon nanotubes in polymer melts”, Compos Sci Technol, vol. 85(21), 17-22 (2013)
  • G. Filippone, M. Salzano de Luna, “A Unifying Approach for the Linear Viscoelasticity of Polymer Nanocomposites”, Macromolecules, vol. 45(21), 8853-8860 (2012)
  • G. Filippone, M. Salzano de Luna, D. Acierno, P. Russo, “Elasticity and structure of weak graphite nanoplatelets (GNPs) networks in polymer matrices through rheological analyses”, Polymer, vol. 53(13), 2699-2704 (2012)
  • G. Capuano, G. Filippone, G. Romeo and D. Acierno, “Universal Features of the Melt Elasticity of Interacting Polymer Nanocomposites”, Langmuir, vol. 28(12), 5458-5463 (2012)
  • G. Filippone, G. Romeo, and D. Acierno, “Viscoelasticity and structure of polystyrene/fumed silica nanocomposites: filler network and hydrodynamic contributions”, Langmuir, vol. 26(4), 2714-2720 (2010)

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Ref. Giovanni Filippone@

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