Control of internal (2D and 3D hexagonal) mesostructure and particle morphology of spherical mesoporous silica particles using the emulsion and solvent evaporation (ESE) method

Sörensen, Malin H.; Zhu, Jintao; Corkery, Robert W.; Hayward, Ryan C.; Alberius, Peter

doi:10.1016/j.micromeso.2008.12.002

Cited by 9 publications

(7 citation statements)

References 38 publications

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“…This material was chosen as support due to the large pore size [26] as well as the spherical shape of the particles and the relatively large particle size, facilitating confocal laser scanning microscopy (CLSM) studies.…”

Section: Resultsmentioning

confidence: 99%

Improved enzymatic activity of Thermomyces lanuginosus lipase immobilized in a hydrophobic particulate mesoporous carrier

Sörensen¹,

Bergström

et al. 2010

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 99%

Improved enzymatic activity of Thermomyces lanuginosus lipase immobilized in a hydrophobic particulate mesoporous carrier

Sörensen¹,

Bergström

et al. 2010

Journal of Colloid and Interface Science

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“…Our interest in the F127/PPG 400/water system arose because it could be used as a structure directing agent in the synthesis of mesoporous materials. Recent publications − have indicated advantages in expansion of mesoporous structure using polypropylene glycol (PPG3000) as a swelling agent. TEOS was used as the silica source, and F127 was used as the template.…”

Section: Introductionmentioning

confidence: 99%

Effects of Polypropylene Glycol 400 (PPG400) on the Micellization and Gelation of Pluronic F127

et al. 2015

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In dilute aqueous solution unimers of Pluronic F127 associate to form micelles. In more concentrated solution, micelles pack to form high-modulus gels. Our interest is the effect of addition of 10–30 wt % low molecular weight PPG400 on the micellization and gelation of solutions of F127. DLS was used to determine the apparent size of the micelles (r h,app). The critical micelle concentration (cmc) using the dye solubilization method of F127 in PPG400 solutions was studied. Visual observation was carried out to detect gel formation in concentrated solutions and the onset of clouding and turbidity, as the temperature was raised. Oscillatory rheometry was used to confirm the formation of high-modulus gels and provide values of elastic moduli (G′max) over a wide temperature range. SAXS was used to determine gel structure. Our results for the hydrophobic adduct PPG400 were compared with literature values for the hydrophilic adduct PEG6000.

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“…Mesostructured silica spheres with large pores were produced with a recently developed method: the emulsion and solvent evaporation (ESE) method . This method consists of five steps: (i) the preparation of a precursor solution; (ii) the emulsification of the precursor solution; (iii) the evaporation of ethanol and water by reducing the pressure; (iv) the separation of particles; and finally (v) removing the surfactant by a thermal treatment in air (calcination).…”

Section: Methodsmentioning

confidence: 99%

Intraparticle Transport and Release of Dextran in Silica Spheres with Cylindrical Mesopores

Kamali-Zare

Sörensen³

et al. 2009

Langmuir

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The transport of oligomeric molecules in silica spheres with cylindrical mesopores has been quantified and related to the structural features of the spherical particles and the interactions at the solid-liquid interface. An emulsion-solvent evaporation method was used to produce silica spheres having cylindrical mesopores with an average pore diameter of 6.5 nm. The transport of dextran molecules (fluorescently tagged) with molecular weights of 3000 and 10,000 g/mol was quantified using confocal laser scanning microscopy (CLSM). The intraparticle concentration profiles in the dextran-containing spheres were flat at all times, suggesting that the release is not isotropic and not limited by diffusion. The release of dextran into the solution is characterized by an initial burst, followed by long-term sustained release. The release follows a logarithmic time dependency, which was rationalized by coupling concentration-dependent effective diffusion constants with adsorption/desorption.

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Control of internal (2D and 3D hexagonal) mesostructure and particle morphology of spherical mesoporous silica particles using the emulsion and solvent evaporation (ESE) method

Cited by 9 publications

References 38 publications

Improved enzymatic activity of Thermomyces lanuginosus lipase immobilized in a hydrophobic particulate mesoporous carrier

Improved enzymatic activity of Thermomyces lanuginosus lipase immobilized in a hydrophobic particulate mesoporous carrier

Effects of Polypropylene Glycol 400 (PPG400) on the Micellization and Gelation of Pluronic F127

Intraparticle Transport and Release of Dextran in Silica Spheres with Cylindrical Mesopores

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