Mzia Kezherashvili

The acquisition and use of polymeric membranes with different pore sizes (0.2 μm, 0.45 μm, 0.8 μm) for wine filtration is discussed. The surface topography, productivity and pore dimensions of the obtained membrane samples are studied. It is established that by using filters of membrane samples obtained by wine filtration, it is possible to reduce the initial turbidity of wine from 20.35 NTU to 0.26 -0.6 NTU and to remove yeasts, mold fungi, lactose, vinegar and coliforms in the wine

Polymeric membranes with porous dimensions of 0.005 μm, 0.1 μm, 0,2 μm, 0,45 μm with small surface relief (1-10 nm) are designed and processed to obtain crystal clear, sterile water, while retaining polymer membranes are obtained to remove chemical components. Particles with a molecular mass of 20-10000 daltons. Membrane machines equipped with this type of membranes provide high quality drinking water, the obtained product is ecologically clean

The paper presents some results of experimental development of the methodology for determining the molecular mass of components needed to create nanocomposite materials. The data obtained as a result of adjusting the parameters of different concentrations of the order, step, delay time and device are given. The optimal mode parameters of the instrument and the concentration values of the test substance are established to achieve high accuracy of repetition of results.

The preparation of asymmetric membranes by the phase-inversion process is a standard technique nowadays. During the study we tested the solvent resistance of the membrane, also investigated the effect of the concentration of polymer solution, the evaporation time of solvent and the temperature of coagulation bath on the membrane performance. The structure of porous membrane is related to the characteristics of the interacting polymer and solvent, components concentration, molecular weight, temperature and storing time in solution. Dimethylsulfoxide (DMSO), dimethylacetamide (DMAC), n-methylpyrrolidone (NMP) and acetone served as solvents for the preparation of the casting solutions. Several additives such as benzene, tetrahydrofure(THF), formamide were used in the casting solution. Water, methanol, glycerol, formic acid and mixtures of these components were used as precipitants the polymer concentration in the casting solution was varied between sand 25wt % polymer.

The mechanical properties and chemical structural changes during the photochemical aging process were studied by using appropriate techniques including infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), atomic force microscopy (AFM) and permeability measurements.

Doctoral Thesis Referee

Master Theses Supervisor

Doctoral Thesis Supervisor/Co-supervisor

Scientific editor of monographs in foreign languages

Scientific editor of a monograph in Georgian

Editor-in-Chief of a peer-reviewed or professional journal / proceedings

Review of a scientific professional journal / proceedings

Member of the editorial board of a peer-reviewed scientific or professional journal / proceedings

Participation in a project / grant funded by an international organization

Participation in a project / grant funded from the state budget

Patent authorship

Membership of the Georgian National Academy of Science or Georgian Academy of Agricultural Sciences

Membership of an international professional organization

Membership of the Conference Organizing / Program Committee

National Award / Sectoral Award, Order, Medal, etc.

Honorary title

Monograph

Handbook

Research articles in high impact factor and local Scientific Journals

Publication in Scientific Conference Proceedings Indexed in Web of Science and Scopus