The effect of double-chain surfactants on armored bubbles: a surfactant-controlled route to colloidosomes

Abstract

We find that the gas phases of air bubbles covered with anionic or cationic polystyrene latex particles dissolve on exposure to cationic and catanionic surfactants. The particles on the bubble interface are released as singlets or aggregates when the surfactant has a single hydrophobic chain, while porous colloidal capsules (colloidosomes) with the same aqueous phase inside as out are obtained when the surfactant has two hydrophobic chains. The formation of colloidosomes from the particle-covered bubbles does not appear to depend significantly on the charge of the particles, which makes it unlikely that bilayers of surfactant are stabilizing the colloidosome. While the exact mechanism of formation remains an open question, our method is a simple one-step process for obtaining colloidosomes from particle-covered bubbles.

Double Emulsion‐Templated Nanoparticle Colloidosomes with Selective Permeability

“…Thus, it is important to develop a more convenient and direct means to create monodisperse and fully controllable colloidosomes, in particular, eliminating the transfer step. [13] In this work, we demonstrate that nanoparticle colloidosomes with selective permeability can be prepared from monodisperse double emulsions as templates. Monodisperse water-in-oil-in-water (W/O/W) double emulsions with a core/ shell geometry are generated using glass capillary microfluidic devices.…”

Semi-permeable vesicles composed of natural clay

“…Once the outer liquid spreads completely and displaces the air from the inner surface of the clay aggregate ( Fig. 6C), the air bubble is no longer stable 15 and dissolves into the surrounding liquid leaving behind a clay vesicle (Fig. 6D).…”

Effect of particle adsorption rates on the disproportionation process in pickering stabilised bubbles

“…36 Alternatively they may compete with the particles for adsorption onto the surface of bubbles. 37,38 In some instances there seems to be some synergy between the these surface active molecules and the nanoparticles, 23,39 , whereas the protein hydrophobin seems to behave like a surface active nanoparticle. Much research has recently been devoted to the exceptional stability of bubbles stabilized by hydrophobins.…”