Cell Dynamic Simulations of Diblock Copolymer/Colloid Systems

TL;DR

This paper presents a hybrid mesoscopic simulation approach to study how nanoparticles influence the morphology and properties of diblock copolymer matrices, capturing effects like phase transitions and particle placement.

Contribution

It introduces a variable-preference hybrid simulation method that models colloids individually within a continuum polymer matrix, enabling analysis of nanoparticle effects on copolymer morphology.

Findings

Reproduces colloid-induced phase transitions.

Analyzes particle placement within the matrix.

Explores role of incompatibilities between colloids and monomers.

Abstract

The presence of nanoparticles in a diblock copolymer leads to changes in the morphology and properties of the matrix and can produce highly organized hybrid materials. The resulting material properties depend not only on the polymer composition but also on the size, shape, and surface properties of the colloids. The dynamics of this kind of systems using a hybrid mesoscopic approach has been studied in this work. A continuum description for the polymer is used, while colloids are individually resolved. The method allows for a variable preference of the colloids, which can have different sizes, to the different components the block copolymer is made of. The impact that the nanoparticle preference for either, both, or none of the blocks has on the collective properties of nanoparticle-block copolymer composites can be analyzed. Several experimental results are reproduced covering colloid-induced phase transition, particles' placement within the matrix, and the role of incompatibilities between colloids and monomers.