Kaolinite-based Janus nanoparticles as a compatibilizing agent in polymer blends

The aim of this work was to obtain Janus nanoparticles from known methods using easily accessible cation modifiers. In addition, the intent was to study the use of these particles in polystyrene/poly (methyl methacrylate) (PS/PMMA) polymer blends and to perform a complete study of their properties. Two types of Janus nanoparticles were obtained using kaolinite. The octahedral and tetrahedral layers of the clay mineral were modified with a PMMA hairy copolymer and two species of amines, in order to interact with PMMA and PS phases in a polymer blend. The blends were obtained by solution processing using a mixer with high rotation and then evaluated by their morphology and thermo-mechanical, mechanical, and thermal properties. The microscopic analysis showed that the incorporation of Janus nanoparticles improved the interaction between phases and the size of the domains was reduced which increased their compatibility. This increase in compatibility had an influence on the mechanical, thermal, and thermo-mechanical properties. In relation to a pure blend, it increased the storage modulus, Young's modulus, and strain of break up to 50%, 35% and 70%, respectively. The construction of different types of Janus nanoparticles as well as their application in PS/PMMA blends resulted in an interesting material with enhanced properties which indicated that these nanoparticles have a compatibilizing effect in polymeric systems.