Attractive Pickering Emulsion Gels

Abstract

Properties of emulsions highly depend on the interdroplet interactions and, thus, engineering interdroplet interactions at molecular scale are essential to achieve desired emulsion systems. Here, attractive Pickering emulsion gels (APEGs) are designed and prepared by bridging neighboring particle‐stabilized droplets via telechelic polymers. In the APEGs, each telechelic molecule with two amino end groups can simultaneously bind to two carboxyl functionalized nanoparticles in two neighboring droplets, forming a bridged network. The APEG systems show typical shear‐thinning behaviors and their viscoelastic properties are tunable by temperature, pH, and molecular weight of the telechelic polymers, making them ideal for direct 3D printing. The APEGs can be photopolymerized to prepare APEG‐templated porous materials and their microstructures can be tailored to optimize their performances, making the APEG systems promising for a wide range of applications.

Preparing an ATP/P (n‐BuMA‐St)/Fe3O4 Oil‐Absorbing Resin Composite via a Double Pickering Emulsion Template Method and Elucidation of Its Properties

“…When the particles are hydrophobic, they tend to disperse in the oil phase and stabilize W/O emulsions. Only particles with intermediate hydrophobicity show the best performances for producing stable W/O emulsions [23,24] . In Figure 8A, water droplets on the modified Fe 3 O 4 surface are spherical with contact angles greater than 90°, indicating that the modified Fe 3 O 4 particles are hydrophobic and can be used to prepare W/O Pickering emulsions.…”

“…Only particles with intermediate hydrophobicity show the best performances for producing stable W/O emulsions. [23,24] In Figure 8A, water droplets on the modified Fe 3 O 4 surface are spherical with contact angles greater than 90°, indicating that the modified Fe 3 O 4 particles are hydrophobic and can be used to prepare W/O Pickering emulsions. Meanwhile, we find that with an increase in the dosage of modifier KH-570, the contact angle of water droplets on the Fe 3 O 4 surface decreases first and then increases.…”

Interfacial Engineering of Attractive Pickering Emulsion Gel-Templated Porous Materials for Enhanced Solar Vapor Generation

“…Since the initiator is added in the oil phase, polymerization initiates in the oil phase when the APEGs are exposed to UV irradiation, yield APEG-templated porous evaporators (APEG-TPEs) with inter-connected pores. Since polystyrene is naturally a good thermal insulation material [38], APEG-TPEs are excellent scaffolds for the design of solar evaporators. The as-prepared APEG-TPEs are then hydrolyzed to improve water transport and a polypyrrole (PPy) layer is introduced on the top surface of the samples by chemical vapor deposition to realize photothermal conversion function, as schematically illustrated in Figure 1b.…”

“…A series of photopolymerizable APEGs were prepared according to the reference [38]. Shellac nanoparticles (NPs) were prepared by flash nanoprecipitation.…”

A thermo-responsive MOF-based H2O2-in-oil “pickering emulsion in situ catalytic system” for highly efficient olefin epoxidation

“…[27][28][29][30] In recent years, environmentally responsive Pickering emulsions have attracted great focus as a highly efficient catalytic system due to their excellent catalytic performance and ease of product separation and recyclability. [32][33][34][35][36][37][38] It has been reported that MOFs can be employed as suitable emulsifiers for Pickering emulsion after post-synthetic modification (PSM) and covalent incorporation with functional polymer. [39][40][41][42][43][44] For example, light-, pH-, and thermo-responsive Pickering emulsions provide efficient solutions for various catalytic reactions.…”