TY  - JOUR
AU  - Dragosavac, Marijana M.
AU  - Vladisavljević, Goran T.
AU  - Holdich, Richard G.
AU  - Stillwell, Michael T.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4644
AB  - A method for the production of near-monodispersed spherical silica particles with controllable porosity based on the formation of uniform emulsion droplets using membrane emulsification is described. A hydrophobic metal membrane with a 15 mu m pore size and 200 mu m pore spacing was used to produce near-monodispersed droplets, with a mean size that could be controlled between 65 and 240 mu m containing acidified sodium silicate solution (with 4 and 6 wt % SiO(2)) in kerosene. After drying and shrinking, the final silica particles had a mean size in the range between 30 and 70 mu m. The coefficient of variation for both the droplets and the particles did not exceed 35%. The most uniform particles had a mean diameter of 40 mu m and coefficient of variation of 17%. By altering the pH of the sodium silicate solution and aging the gel particles in water or acetone, the internal structure of the silica particles was successfully modified, and both micro- and mesoporous near-monodispersed spherical particles were produced with an average internal pore size between 1 and 6 nm and an average surface area between 360 and 750 m(2) g(-1). A material balance and particle size analysis provided identical values for the internal voidage of the particles, when compared to the voidage as determined by BET analysis.
T2  - Langmuir
T1  - Production of Porous Silica Microparticles by Membrane Emulsification
VL  - 28
IS  - 1
SP  - 134
EP  - 143
DO  - 10.1021/la202974b
ER  - 

@article{
author = "Dragosavac, Marijana M. and Vladisavljević, Goran T. and Holdich, Richard G. and Stillwell, Michael T.",
year = "2012",
abstract = "A method for the production of near-monodispersed spherical silica particles with controllable porosity based on the formation of uniform emulsion droplets using membrane emulsification is described. A hydrophobic metal membrane with a 15 mu m pore size and 200 mu m pore spacing was used to produce near-monodispersed droplets, with a mean size that could be controlled between 65 and 240 mu m containing acidified sodium silicate solution (with 4 and 6 wt % SiO(2)) in kerosene. After drying and shrinking, the final silica particles had a mean size in the range between 30 and 70 mu m. The coefficient of variation for both the droplets and the particles did not exceed 35%. The most uniform particles had a mean diameter of 40 mu m and coefficient of variation of 17%. By altering the pH of the sodium silicate solution and aging the gel particles in water or acetone, the internal structure of the silica particles was successfully modified, and both micro- and mesoporous near-monodispersed spherical particles were produced with an average internal pore size between 1 and 6 nm and an average surface area between 360 and 750 m(2) g(-1). A material balance and particle size analysis provided identical values for the internal voidage of the particles, when compared to the voidage as determined by BET analysis.",
journal = "Langmuir",
title = "Production of Porous Silica Microparticles by Membrane Emulsification",
volume = "28",
number = "1",
pages = "134-143",
doi = "10.1021/la202974b"
}

Dragosavac, M. M., Vladisavljević, G. T., Holdich, R. G.,& Stillwell, M. T.. (2012). Production of Porous Silica Microparticles by Membrane Emulsification. in Langmuir, 28(1), 134-143.
https://doi.org/10.1021/la202974b

Dragosavac MM, Vladisavljević GT, Holdich RG, Stillwell MT. Production of Porous Silica Microparticles by Membrane Emulsification. in Langmuir. 2012;28(1):134-143.
doi:10.1021/la202974b .

Dragosavac, Marijana M., Vladisavljević, Goran T., Holdich, Richard G., Stillwell, Michael T., "Production of Porous Silica Microparticles by Membrane Emulsification" in Langmuir, 28, no. 1 (2012):134-143,
https://doi.org/10.1021/la202974b . .