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Preparation of Surface-Wrinkled Silica-Polystyrene Colloidal Composite Particles. | LitMetric

Preparation of Surface-Wrinkled Silica-Polystyrene Colloidal Composite Particles.

Langmuir

School of Materials and Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China.

Published: June 2024

In this work, we report a facile emulsion swelling route to prepare surface-wrinkled silica-polystyrene (SiO-PS) composite particles. Submicrometer-sized, near-spherical SiO-PS composite particles were first synthesized by dispersion polymerization of styrene in an ethanol/water mixture, and then, surface-wrinkled SiO-PS particles were obtained by swelling the SiO-PS particles with a toluene/water emulsion and subsequent drying. It is emphasized that no surface pretreatment on the SiO-PS composite particles is required for the formation of the wrinkled surface, and the most striking feature is that the surface-wrinkled particle was not deformed from a single near-spherical SiO-PS composite particle but from many ones. The influence of various swelling parameters including toluene/particle mass ratio, surfactant concentration, stirring rate, swelling temperature, swelling time, and silica size on the morphology of the composite particles was studied. This method represents a new paradigm for the preparation of concave polymer colloids.

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Source
http://dx.doi.org/10.1021/acs.langmuir.4c00050DOI Listing

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