Abstract
Ceramic ZrO2 and TiO2 nanofiltration membranes were produced by using a polymeric sol gel route. The influence of different parameters like additives and solvents onto the hydrolysis and polycondensation properties of the sols was studied by IR- and NMR-spectroscopy and viscosity measurements. The prepared ceramic membranes were characterized by different methods. Structure and phases were investigated by X-ray diffraction, thickness and quality by the aid of SEM and FESEM. The membranes exhibit an average pore size in the range of 1–2 nm as determined from N2-adsorption–desorption measurements. The filtration properties of the membranes were examined by filtration tests with two colouring agents. A cut-off value of less than 1000 Da was determined.
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