Abstract
Phospholipid is an abundant and nature-friendly resource, which works as functional building blocks for various soft materials. Herein, we report the use of mesoporous phospholipid particles (MPPs) to stabilize liquid/liquid interfaces to produce oil-in-water emulsions. The MPPs are solid particles of approximately 10 μm in size, composed of lipid bilayers. MPPs have been proven to possess high surface activity compared to liposomes which enables their adsorption at the oil/water interface, resulting in the formation of an oil-in-water emulsion. When isooctane was used as the organic phase, the resulting emulsion was stable for at least 6 h. In one day, the emulsion flocculated on the surface of the suspension, where the destabilization mechanism depended on the presence of charged molecules on the MPP. Destabilization was initiated by aggregation of the emulsion droplets with the charged MPPs, whereas coalescence occurred in the case of the non-charged MPP. These materials can substitute surfactants as more nature-friendly materials with possible applications for oil adsorbent/recovery in seawater and soils.
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