Potvorova N. Functionalized polyacrylonitrile composite membranes

The object of the study is providing of the functionalized membranes. The aim of this work is to establish conditions for the formation of PAN membranes, development of methods for their modification, the study of the influence of the type of modification to the chemical nature of the surface and the structure of the obtained composite membranes, their functionality and performance. The main results were obtained using the methods of measuring the zeta potential of the membrane surface by the potential flow method, IR spectroscopy for the study of the chemical nature of the surface layers of the membrane, scanning electron microscopy to study the morphology and structural characteristics of the membrane, microbiological methods for the study of antibacterial properties. It is established that the volume and surface modification of polyacrylonitrile membrane leads to the hydrophilizing of the surface, promotes the formation of fine pore and surface structure, which improves the separation characteristics of the membrane. The resulting composite membrane under in vitro conditions exhibit stable in time bactericidal or antibacterial properties against Escherichia coli HB 101 and Staphylococcus aureus CCM 209 depending on the chemical nature of the antibacterial agent. The obtained composite polyacrylonitrile membranes were implemented in the pilot installation for the purification of microbiologically and technically contaminated water.