Novel-membrane_Dragosavac_et_al.pdf (323.22 kB)
Novel membrane emulsification method of producing highly uniform silica particles using inexpensive silica sources
journal contributionposted on 2012-02-10, 10:11 authored by Marijana DragosavacMarijana Dragosavac, Goran VladisavljevicGoran 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.
- Aeronautical, Automotive, Chemical and Materials Engineering
- Chemical Engineering
CitationDRAGOSAVAC, 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
- AM (Accepted Manuscript)
NotesThe original publication is available at www.springerlink.com