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Novel membrane emulsification method of producing highly uniform silica particles using inexpensive silica sources

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journal contribution
posted on 10.02.2012, 10:11 by Marijana Dragosavac, Goran Vladisavljevic, Richard Holdich, Michael T. Stillwell
A membrane emulsification method for production of monodispersed silica-based ion exchange particles through water-in-oil emulsion route is developed. A hydrophobic microsieve membrane with 15 :m pore size and 200 :m pore spacing was used to produce droplets, with a mean size between 65 and 240 :m containing acidified sodium silicate solution (with 4 and 6% wt. SiO2) in kerosene. After drying, the final silica particles had a mean size in the range between 30 and 70 :m. Coefficient of variation for both the droplets and particles did not exceed 35%. The most uniform particles had a mean diameter of 40 :m and coefficient of variation of 17%. The particles were functionalised with 3-aminopropyltrimethoxysilane and used for chemisorption of Cu(II) from an aqueous solution of CuSO4 in a continuous flow stirred cell with slotted pore microfiltration membrane. Functionalised silica particles showed a higher binding affinity toward Cu(II) than non-treated silica particles.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Citation

DRAGOSAVAC, M.M. ... et al., 2012. Novel membrane emulsification method of producing highly uniform silica particles using inexpensive silica sources. Progress in Colloid and Polymer Science, 139, pp. 7-11.

Publisher

© Springer Verlag

Version

AM (Accepted Manuscript)

Publication date

2012

Notes

The original publication is available at www.springerlink.com

ISSN

0340-255X

Language

en

Exports