ΑΝΑΠΤΥΞΗ ΝΕΩΝ ΧΡΩΜΑΤΟΓΡΑΦΙΚΩΝ ΜΕΘΟΔΟΛΟΓΙΩΝ ΓΙΑ ΤΗ ΜΕΛΕΤΗ ΔΙΕΠΙΦΑΝΕΙΩΝ ΚΑΙ ΤΟ ΧΑΡΑΚΤΗΡΙΣΜΟ ΚΟΛΛΟΕΙΔΩΝ ΣΩΜΑΤΙΔΙΩΝ ΚΑΙ ΜΑΚΡΟΜΟΡΙΩΝ

Abstract

DEVELOPED NEW METHODOLOGIES OF FIELD-FLOW-FRACTIONATION(FFF) FOR THE SEPARATION AND CHARACTERERIZATION OF COLLOIDAL PARTICLES AND MACROMOLECULES. THIS DEVELOPMENT COMPRISED: 1. METHODOLOGIES FOR THE SIMULTANEUS DETERMINATION OF PARTICLE SIZE AND DENSITY IN POLYDISPERSE COLLOIDAL SAMPLES. THIS CAN BE DONE BYAWETHODOLOGY BASED ON THE VARIATION OF THE CARRIER SOLUTION DENSITY USING VARIOUS AQUEOUS GLYCEROL SOLUTIONS HAVING DIFFERENT CONCENTRATIONS. 2. THE REVERSIBILITY OF ADHESION OF COLLOIDAL PARTICLES ON THE CHANNEL WALL IN SFFF THROUGHT THE VARIATION OF THE IONIC STRENGTH OF THE CARRIER SOLUTION, HAS BEEN THE BASIS PF A NEW METHOD, FOR THE SEPARATION AND CHARACTERIZATION OF COLLOIDAL MATERIAL. THIS NEW METHOD, CALLED "POTENTIAL BARRIER FIELD-FLOW FRACTIONATION", WAS APPLIED FOR THE SEPARATION OF HAEMATITE AND TITANIUM DIOXIDE SPHERICAL COLLOIDAL PARTICLES WITH DIFFERENT SIZES. 3. A NEW METHODOLOGY FOR THE CONCENTRATION AND PARTICLE SIZE ANALYSIS OF DILUTE POLYDISPERSE COLLOIDAL SAMPLES IS PRESENTED. THE NEW METHODOLOGY OF POTENTIAL BARRIER FFF WAS SUCCESSFULLY APPLIED FOR THE CONCENTRATION OF DILUTE MONODISPERSE COLLOIDAL SAMPLES OF HAEMATITE. (ABSTRACT TRUNCATED)