TY - JOUR
T1 - Non-aqueous retention measurement
T2 - Ultrafiltration behaviour of polystyrene solutions and colloidal silver particles
AU - Beerlage, M.A.M.
AU - Heijnen, M.L.
AU - Mulder, M.H.V.
AU - Smolders, C.A.
AU - Strathmann, H.
PY - 1996
Y1 - 1996
N2 - The retention behaviour of polyimide ultrafiltration membranes was investigated using dilute solutions of polystyrene in ethyl acetate as test solutions. It is shown that flow-induced deformation of the polystyrene chains highly affects the membrane retention. This coil-stretch transition is not instantaneous, but gradual. The concept of a deformation resistance has been ontroduced to explain this behaviour. This concept can be applied to describe the flux behaviour of the membranes during the tests as well. Solute deformation allows comparison of the pore size distributions of the membranes qualitatively. Retention measurements were also performed with silver sol particles that were prepared in mixtures of ethanol and water; these sols remain stable as long as the ethanol concentration does not exceed 57 vol%. The sols were completely retained by the membranes, which is probably caused by the fact that the effective diameter of the particles is much larger than that observed by transmission electron microscopy.
AB - The retention behaviour of polyimide ultrafiltration membranes was investigated using dilute solutions of polystyrene in ethyl acetate as test solutions. It is shown that flow-induced deformation of the polystyrene chains highly affects the membrane retention. This coil-stretch transition is not instantaneous, but gradual. The concept of a deformation resistance has been ontroduced to explain this behaviour. This concept can be applied to describe the flux behaviour of the membranes during the tests as well. Solute deformation allows comparison of the pore size distributions of the membranes qualitatively. Retention measurements were also performed with silver sol particles that were prepared in mixtures of ethanol and water; these sols remain stable as long as the ethanol concentration does not exceed 57 vol%. The sols were completely retained by the membranes, which is probably caused by the fact that the effective diameter of the particles is much larger than that observed by transmission electron microscopy.
U2 - 10.1016/0376-7388(95)00125-5
DO - 10.1016/0376-7388(95)00125-5
M3 - Article
SN - 0376-7388
VL - 1996
SP - 259
EP - 273
JO - Journal of membrane science
JF - Journal of membrane science
IS - 113
ER -