Stabilization of Non-Aqueous Pickering Emulsions and their use for Encapsulation of Water-Sensitive Liquids
Emulsions stabilized by solid particles (e.g., Pickering emulsions) are attractive platforms for creating composite structures, including capsules with liquid core. This presentation will address the use of non-aqueous Pickering emulsions for the encapsulation of compositionally sensitive liquids, including salt hydrate phase change materials (PCMs) and ionic liquids (ILs). Hydrophobized graphene oxide nanosheets are dispersible in an oil which becomes the continuous phase, and upon agitation of this dispersion with an immiscible liquid, emulsions are formed in which the modified particles reside at the fluid-fluid interface, imparting stabilization. This presentation will address the use of these emulsions for encapsulation of PCM or IL by polymer formation at the interface, providing a core-shell structure, as well as the application of these composite capsules in thermal energy management (e.g., PCM core) and carbon capture (e.g., IL core).