Micro/Nano Encapsulation via Electrified Coaxial Liquid Jets

Loscertales, Ignacio G.; Barrero, Antonio; Guerrero, Ismael; Cortijo, R. O.; Márquez, Manuel; Gañán‐Calvo, Alfonso M.

doi:10.1126/science.1067595

Cited by 916 publications

(577 citation statements)

References 29 publications

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“…It is extensively used for the synthesis of non-crosslinked particles via precipitation of polymers from their solutions [243][244][245][246][247], and a limited number of reports describe monomer polymerization [248][249][250], all of which being about nonporous particles. Loscertales et al [248] successfully electrified a coaxial jet composed of two immiscible liquids, the outer one being a commercial photo-polymerizable resin. Jet breakup resulted in monodisperse compound droplets and UV curing gave uniform submicron capsules with a liquid core.…”

Section: Other Techniquesmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

440

309

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Section: Other Techniquesmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

440

309

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“…It also allows encapsulating of core liquid and the production of tubes [12,13]. The sol-gel technique has been widely studied for the preparation of different forms including monoliths, powders, coatings, and fibers [14,15].…”

Section: Introductionmentioning

confidence: 99%

Electrospinning of silica sub-microtubes mats with platinum nanoparticles for NO catalytic reduction

Ruiz-Rosas¹,

Rosas²,

Loscertales³

et al. 2014

Applied Catalysis B: Environmental

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Silica sub-microtubes loaded with platinum nanoparticles have been prepared in flexible non-woven mats using co-axial electrosppining technique. A partially gelated sol made from tetraethyl orthosilicate was used as the silica precursor, and oil was used as the sacrificial template for the hollow channel generation. Platinum has been supported on the wall of the tubes just adding the metallic precursor to the sol-gel, thus obtaining the supported catalyst by one-pot method. The silica tubes have a high aspect ratio with external/internal diameters of 400/200 nm and well-dispersed platinum nanoparticles of around 2 nm. This catalyst showed a high NO conversion with very high selectivity to N 2 at mild conditions in the presence of excess oxygen when using C 3 H 6 as reducing agent. This relevant result reveals the potential of this technique to produce nanostructured catalysts onto easy to handle conformations.Keywords: coaxial electrospinning, silica nanotubes, platinum nanoparticles, NOx SCR. Graphical AbstractHighlights  Non-woven mats of platinum-loaded silica nanotubes were obtained by co-axial electrospinning in one-pot procedure. By this technique, high dispersed Pt nanoparticles can be easily deposited on the walls of the silica nanotubes. Pt-loaded silica nanotube non-woven mats show high activity for low temperature NOx SCR with propylene in the presence of excess oxygen and outstanding N 2 selectivity, at the studied operation conditions.

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“…Recently, several research groups have reported synthesis of polymer particles in microfluidic reactors (Cohen et al 2001;Dendukuri et al 2005;Jeong et al 2005;Lewis et al 2005;Loscertales et al 2002;Nie et al 2005Nie et al , 2006Nisisako et al 2004;Seo et al 2005aSeo et al , 2005bTakeuchi et al 2005;Utada et al 2005;Xu et al 2005;Zhang et al 2006). The syntheses included a two-step process: (1) microfluidic emulsification of monomer or polymeric fluids, and (2) subsequent in-situ (on chip) solidification of the droplets by means of polymerization, gelation, or solvent evaporation.…”

Section: Introductionmentioning

confidence: 99%

Emulsification in a microfluidic flow-focusing device: effect of the viscosities of the liquids

Nie

Seo

et al. 2008

Microfluid Nanofluid

320

236

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We report the results of a comparative study of microfluidic emulsification of liquids with different viscosities. Depending on the properties of the fluids and their rates of flow, emulsification occurred in the dripping and jetting regimes. We studied the characteristic features and typical dependence of the size and of the size distribution of droplets in each regime. For each liquid, we identified a range of hydrodynamic conditions promoting generation of highly monodisperse droplets. Viscosity played an important role in emulsification: highly viscous liquids were emulsified into larger droplets with lower polydispersity. Although it was not possible to provide a unified scaling for the volumes of the droplets, our results suggest that the break-up dynamics of the lower viscosity fluids resembles the rate-of-flow-controlled break-up, as reported earlier for the formation of bubbles in flow-focusing geometries [Garstecki P, Stone HA, Whitesides GM (2005) Phys Rev Lett 94:164501]. The results of this study can be helpful for a rationalized selection of liquids for the controlled formation of droplets with a predetermined size and with a narrow distribution of sizes.

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Micro/Nano Encapsulation via Electrified Coaxial Liquid Jets

Cited by 916 publications

References 29 publications

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Electrospinning of silica sub-microtubes mats with platinum nanoparticles for NO catalytic reduction

Emulsification in a microfluidic flow-focusing device: effect of the viscosities of the liquids

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