Filtration of deformable emulsion droplets.
Oil-in-water (o/w) emulsions of different droplet size were filtered on membranes of various pore sizes to investigate the growth and behaviour of o/w filter cakes. The cake desorptivity S and the filter membrane resistance R were measured at various filtration pressures P. The variation of S with P shows that filter cake oil droplets of radius a are effectively rigid for P << gamma/a and fully deformable for P >> gamma/a, where gamma is the oil-water interfacial tension. For the largest P, when S became P-independent, the filter cake remained water-permeable as expected from theory.
Headen
T F
TF
BP Institute and the Department of Chemistry, University of Cambridge, Madingley Road, Cambridge, UK.
Clarke
S M
SM
Perdigon
A
A
Meeten
G H
GH
Sherwood
J D
JD
Aston
M
M