Pickering emulsion engineering: fabrication of materials with multiple cavities

Abstract

Materials with millimeter to centimeter dimensions containing multiple cavities were fabricated based on Pickering emulsion engineering.

Synthesis of polyacrylamides hydrophobically modified with butyl acrylate using a nanoclay with interlayer spaces for butyl acrylate aggregation: studies on the microstructure and aqueous solution viscosity

“…Thus, single layers can physically adsorb on the surface of hydrophobic BA droplets, producing a system so called clay-stabilized Pickering emulsion. 29,30 It is expected that reaction in such system proceeds with a pattern similar to the heterogeneous method (Fig. 1c), producing a copolymer with a general formula of [(AM) u -co-(BA) v ] w (Fig.…”

“…Under such condition, BA droplets can be covered with the individual single layers of the clay. 29,30 These layers as a barrier can slow down diffusion rate of the BA into the copolymerization locus, i.e. water, and/or prevent entrance of propagating macroradicals into the BA droplets.…”

Probing structure in submicronic aqueous assemblies of emulsified microemulsions and charged spherical colloids using SANS and cryo-TEM

“…However, it is also possible to create a higher coverage of the surfaces, which opens up the possibilities of their functionalization for the creation of complex materials as done with traditional Pickering emulsions [62,63], or for slowing down the release of active molecules incorporated into the formulations [19,64]. Therefore, in addition to their scientific interest, such Colloid-ISAsomes show promise for a range of applications.…”

Synthesis of magnetic Fe3O4/polyamine hybrid microsphere using O/W/O Pickering emulsion droplet as the polymerization micro-reactor

“…Fujii et al consider the Pickering emulsion to be an efficient polymerization template for the fabrication of materials with multiple hollows, with the droplets in the inner phase functioning as porogens. 42,44 In this study, the synergic effect of hydrophobic SM-CaCO 3 , hydrophilic NanoFe 3 O 4 and PEI promote the formation of O/W/O multiple emulsions in which small oil droplets are entrapped within larger water droplets which in turn are dispersed in a continuous oil phase. During polymerization, reactions occurred at the W/O interface of the external emulsion, which was stabilized mainly by SM-CaCO 3 , consuming PEI molecules near the interface.…”

“…41 The presence of strong hydrogen-bonding interactions between the hydroxyl groups of nanoparticles and the hydrogen atoms of the polymer chains can also cause cross-linking gelation of the polymer solution. 42 The gelation of the emulsion is the factor impairing the crosslinking reaction by retarding the free diffusion of glutaraldehyde droplets added in the emulsion; thus, hindering them from encountering and reacting with PEI-containing emulsion droplets.…”