Colloidal lattices of environmentally responsive microgel particles at ionic liquid–water interfaces

H Chen, EM Nofen, K Rykaczewski, LL Dai - Journal of colloid and …, 2017 - Elsevier
Journal of colloid and interface science, 2017Elsevier
This work reports new evidence of the versatility of soft and environmentally responsive
micron-sized colloidal gel particles as stabilizers at ionic liquid-water droplet interfaces.
These particles display a duality with properties ascribed typically to both polymeric and
colloidal systems. The utilization of fluorescently labeled composite microgel particles allows
in-situ and facile visualization without the necessity of invasive sample preparation. When
the prepared particles form monolayers equilibrated at the ionic liquid-water interface on …
Abstract
This work reports new evidence of the versatility of soft and environmentally responsive micron-sized colloidal gel particles as stabilizers at ionic liquid-water droplet interfaces. These particles display a duality with properties ascribed typically to both polymeric and colloidal systems. The utilization of fluorescently labeled composite microgel particles allows in-situ and facile visualization without the necessity of invasive sample preparation. When the prepared particles form monolayers equilibrated at the ionic liquid-water interface on fully covered droplets, the colloidal lattice re-orders itself depending on the surface charge of these particles. Finally, we demonstrate that the spontaneously formed and densely packed layer of microgel particles can be employed for extraction applications, as the interface remains permeable to small active species.
Elsevier
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