Journal of the Serbian Chemical Society 2000 Volume 65, Issue 11, Pages: 829-837
https://doi.org/10.2298/JSC0011829V
Full text ( 5340 KB)
Characterization of water-in-oil emulsions produced with microporous hollow polypropylene fibers
Vladisavljević Goran T. (Faculty of Agriculture, Institute of Food Technology and Biochemistry, Belgrade)
Brösel Sabine (Universiti of Karlsruhe (TH), Faculty of Chemical Engineering, Institute of Food Process Engineering, Karlsruhe, Germany)
Schubert Helmar (Universiti of Karlsruhe (TH), Faculty of Chemical Engineering, Institute of Food Process Engineering, Karlsruhe, Germany)
The preparation of fine and monodispersed water-in-oil (W/O) emulsions by
utilizing hydrophobic hollow polypropylene fibers with 0.4 mm pores was
investigated in this work. The experiments were carried out using
demineralized water as the disperse phase, mineral oil Velocite No. 3 as the
continuous phase, and polyglycerol polyricinoleate (PGPR 90) in the
concentration range of 2.5 - 10 wt % as the oil-soluble emulsifier. The size
of the water droplets in the prepared emulsions and the droplet size
distribution strongly depend on the content of the disperse phase, the
transmembrane pressure difference, and the emulsifier concentration. Stable
emulsions with a very narrow droplet size distribution and a mean droplet
diameter lower than 0.27 µm were produced using 10 wt % PGPR 90 at a
pressure difference below 30 kPa.
Keywords: emulsification, membrane emulsification, water-in-oil emulsions, hollow fiber, polypropylene hollow fibers