Emulsion-templated highly porous

Emulsion-templated highly porous PolyHIPE monoliths These are initiated from high internal phase liquid emulsions and polymerized (see the review by Silber-stein [42]). In general, the main porosity of High Internal Phase Emulsions (HIRES) lies in the micrometer size range, but HIRES may show a multiscale porosity with one distribution down to some tens of nanometers. 

A highly porous polymeric foam can be prepared through emulsion templating by polymerizing the continuous phase of high internal phase emulsions [150], A maleimide-terminated aryl ether sulfone oligomer was copolymerized with divinylbenzene in the continuous phase, using a mixed surfactants system, cetyltrimethylammonium bromide, dodecylbenzene-sulfonic acid sodium salt, and a peroxide initiator. The polymers show a CO2 adsorption and improved mechanical properties. The materials exhibit an open cell and a secondary pore structure with surface areas of a 400 m g ... 

Concentrated COj-in-water emulsions (C/W) are useful for the preparation of highly porous templated structures [40, 41] very similar materials can be generated using conventional O/W emulsions but the latter method is highly solvent intensive, and it is often hard to remove the organic solvent from the pore structure. 

Cameron, N.R., 2005. High internal phase emulsion templating as a route to well-defined porous polymers. Polymer 46,1439-1449. 

Monodisperse latex spheres of a controlled size can be arranged into three-dimensional arrays and are used as templates to prepare well-defined cavities and structures once the latex sphere template has been removed. These latex spheres are identical to one another in size and shape and are often prepared from colloidal clusters resulting from the aggregation of sol-gel colloids (Section 5.6). The spherical polymer clusters can be fabricated by the slow addition of an aqueous solution into a reservoir of hydrophobic silicone liquid, forming emulsion droplets. This produces a highly structured porous matrix with a well-defined structure upon polymerisation. The size of the droplets is controlled by the concentration of the aqueous latex, the speed at which the suspension is stirred and the ratio between the silicone liquid and latex. As the concentration of the latex spheres increases to its critical concentration, i.e. the concentration at which the colloidal spheres start to order themselves into a close-packed structure, the balls are filtered off and are dried, ready to be used as templates. 

Preparation of Porous Magnetic Nanocomposite Materials Using Highly Concentrated Emulsions as Templates... 

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