Magnetically controllable Pickering emulsion prepared by a reduced graphene oxide-iron oxide composite

An Overview of Pickering Emulsions: Solid-Particle Materials, Classification, Morphology, and Applications

“…Traditional and mostly used Pickering emulsifiers are spherical like, however, more other shapes, including flake (Kim et al, 2013; Lin et al, 2015; Erdenedelger et al, 2016), cylinder (He et al, 2007), ellipsoid (Madivala et al, 2009), wire (Patra et al, 2010; Yan et al, 2015), dumbbell (Tu et al, 2013) and so on, are in heated research in recent 20 years. Works that focused on the mechanism of stabilizing Pickering emulsions by non-spherical solid particles have been published, which demonstrated that this stabilizing effect not only relates to steric effect that has been discussed for spherical particles, but also may results from capillary forces on the oil–water interface (Bresme and Oettel, 2007; Madivala et al, 2009).…”

“…One recent review discussed in detail about Pickering emulsion polymerization with GO, clay, and SiO 2 stabilizers for electrorheological (ER) materials, together with Fe 2 O 3 and Fe 3 O 4 particles for magnetorheological (MR) materials, as well as their electric/magnetic-responsive behaviors (Piao et al, 2015). Among many studies referring to this respect, a work loading iron oxide nanoparticles onto RGO formed magnetically responsive Pickering emulsion, of which droplets could move by attraction of a permanent magnet without damage or contortion (Lin et al, 2015). This motion was confirmed to be related to the size of droplets, and will have promising usage for drug-transportation to certain locations by an external magnetic field.…”

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

“…MWCNTs decorated with MNPs are modified by polyaniline to remove methyl orange and Congo red [243]. Magnetically responsive RGO is used to prepare Pickering emulsions especially for water-in-oil emulsions that is used to remove Nile red dye from dodecane [244]. Fe3O4@3-aminophenol-formaldehyde (Fe3O4@APF) core-shell resin polymer magnetic nanocomposites are excellent adsorbent for the removal of methyl blue [245].…”

Recent developments in Pickering emulsions for biomedical applications

“…[90,91] Within Pickering emulsions, inorganic magnetic nanoparticles have been explored as emulsifier agents, most commonly with the aim of producing systems whose direction and motion can be controlled using an externally applied magnetic field whilst maintaining the integrity of the Pickering emulsion. [92][93][94] Such species are promising for magnetic targeting to enhance drug release at a specific site whilst minimising systemic exposure, [93] though little work has shown practical demonstrations of this behaviour in vitro or in vivo. An interesting application of magnetic particle-stabilised Pickering emulsions is for scavenging and removal of unwanted species.…”

“…Lee and co-workers showed the absorbance of a model dye compound into the aqueous phase of a magnetic Pickering emulsion, which can then be magnetically removed and recycled. [94] The magnetic properties of the particles within magnetic Pickering emulsions may also be exploited for triggered emulsion destabilisation and cargo release. This can be through the application of an alternating magnetic field which results in heating of the particles in a manner comparable to that used in hyperthermic treatments.…”