MEMBRANE PREPARATION AND STRUCTURE;
MICROPOROUS AND POROUS MEMBRANES;
ULTRAFILTRATION;
THERMOPOROMETRY;
MEMBRANE CHARACTERIZATION;
D O I:
10.1016/0376-7388(92)80090-7
中图分类号:
TQ [化学工业];
学科分类号:
0817 ;
摘要:
Several ultrafiltration membranes of the anisotropic and isotropic type were characterized by means of the thermoporometry. Successive cooling and heating runs were performed in order to investigate the effects of the water-ice and ice-water phase transitions on the structure of the membranes. The results found for membranes having different casting thicknesses indicate that, in some cases, pores in the sublayer of anisotropic UF membranes frustrate the measurement of the, for the separation, relevant pores present in the top layer.