Synthesis of sol-gel silica particles in reverse micelles with mixed-solvent polar cores: tailoring nanoreactor structure and properties

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Synthesis of sol-gel silica particles in reverse micelles with mixed-solvent polar cores: tailoring nanoreactor structure and properties

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Title: Synthesis of sol-gel silica particles in reverse micelles with mixed-solvent polar cores: tailoring nanoreactor structure and properties
Author/Creator: Burglova, Kristyna | Hlavac, Jan | Bartlett, J R
Description: In this paper, we describe a new approach for producing metal oxide nano- and microparticles via sol–gel processing in confined media (sodium bis(2-ethylhexyl)sulfosuccinate reverse micelles), in which the chemical and physical properties of the polar aqueous core of the reverse micelles are modulated by the inclusion of a second polar co-solvent. The co-solvents were selected for their capacity to solubilise compounds with low water solubility and included dimethylsulfoxide, dimethylformamide, ethylene glycol, n-propanol, dimethylacetamide and N-methylpyrrolidone. A broad range of processing conditions across the sodium bis(2-ethylhexyl)sulfosuccinate/cyclohexane/water phase diagram were identified that are suitable for preparing particles with dimensions less than 50 to more than 500 nm. In contrast, only a relatively narrow range of processing conditions were suitable for preparing such particles in the absence of the co-solvents, highlighting the role of the co-solvent in modulating the properties of the polar core of the reverse micelles. A mechanism is proposed that links the interactions between the various reactive sites on the polar head group of the surfactant and the co-solvent to the nucleation and growth of the particles.
Relation: Journal of Nanoparticle Research / Vol. 17, No. 308, pp.1-17
Relation: http://dx.doi.org/10.1007/s11051-015-3104-4
Year: 2015
Publisher: Springer Netherlands
Subject: FoR 0202 (Atomic, Molecular, Nuclear, Particle and Plasma Physics) | FoR 0912 (Materials Engineering) | FoR 1007 (Nanotechnology) | reverse micelles | sol–gel | encapsulation | sodium bis(2-ethylhexyl)sulfosuccinate | silica nanoparticles

Resource Type: Journal Article
Identifier: ISSN: 1388-0764
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