KEYWORDS: Pickering emulsion, microcapsules, interfacial polymerisation, emulsion stability.
ABSTRACT: Core-shell microcapsules are typically made by preparing an emulsion and forming a polymer shell around the droplets. Conventionally, the emulsion is stabilised by surfactants or polymers. Alternatively, emulsions can be stabilised by fine particles; we discuss capsules made from ultrafine kaolin stabilised Pickering emulsions via interfacial polymerisation.
This approach has a number of potential benefits. The capsule size can be controlled by the dose of particles used, and Ostwald ripening is prevented. Particles become incorporated into the polymer shell of the capsule, potentially offering different mechanical properties and reduced permeability. The capsule surface is rough, allowing a powdered product to be made easily without adhesion of capsules to each other. The particles scatter light and offer some protection from photodegradation.

INTRODUCTION

Microcapsules made from emulsions are used in a wide range of applications in which an active in ...
...
...