Particles with selective wetting affect spinodal decomposition microstructures
| Autor: | Supriyo Ghosh, T.A. Abinandanan, Arnab Mukherjee, Suryasarathi Bose |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Length scale
Spinodal Condensed Matter - Materials Science Materials science Spinodal decomposition Materials Engineering (formerly Metallurgy) General Physics and Astronomy Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Chemical physics Phase (matter) 0103 physical sciences Particle Wetting Physical and Theoretical Chemistry 010306 general physics 0210 nano-technology Ternary operation |
| Popis: | We have used mesoscale simulations to study the effect of immobile particles on microstructure formation during spinodal decomposition in ternary mixtures such as polymer blends. Specifically, we have explored a regime of interparticle spacings (which are a few times the characteristic spinodal length scale) in which we might expect interesting new effects arising from interactions among wetting, spinodal decomposition and coarsening. In this paper, we report three new effects for systems in which the particle phase has a strong preference for being wetted by one of the components (say, A). In the presence of particles, microstructures are not bicontinuous in a symmetric mixture. An asymmetric mixture, on the other hand, first forms a non-bicontinuous microstructure which then evolves into a bicontinuous one at intermediate times. Moreover, while wetting of the particle phase by the preferred component (A) creates alternating A-rich and B-rich layers around the particles, curvature-driven coarsening leads to shrinking and disappearance of the first A-rich layer, leaving a layer of the non-preferred component in contact with the particle. At late simulation times, domains of the matrix components coarsen following the Lifshitz-Slyozov-Wagner law, $R_1(t) \sim t^{1/3}$. Accepted for publication in PCCP on 24th May 2017 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|