Nanocomposite Membranes with pH- and Thermo-sensitive Function

Resent researches and development in the field of membrane science are focused on improvement of synthetic membranes’ functionality. Combination of soft polymer pH- and temperature-sensitive hydrogels with rigid ultrafiltration membrane attracts much interest as a new class of smart functional systems. In this research we develop pH- and temperature-sensitive composite membranes using radical copolymerization method and study their properties depending on hydrogel composition, nature of synthetic mem-branes, temperature and pH of external medium. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3533

Production of nano-pore track membranes based on PET films irradiated by Ar ions

Changes in diameters and depths of pores were studied in the process of etching polyethyleneterephthalate films irradiated with Ar ions having the energy of 1 MeV/n. Information about the pore diameters and lengths was obtained with electron microscopy methods. 0.5 N and 2 N solutions of NaOH were used as etchants. Etching was performed at 55 and 70°C. Two methods of sensitization were used: the first one by UV illumination and treating in dimethylformamide, the second method just by in UV illumination. It was found that diameters and depths of pores are larger in films treated according to the first sensitization method. Etching duration (breakthrough time) which leads to through-going pores of the minimal radius was established. After sensitization according to the first method the track etch rate grows quicker than the transverse etch rate. This gives a possibility to obtain through pores with diameters ranging from 50 nm to several micrometers