Method of producing polyethersulfone and polyvinylpyrrolidone membranes modified with titanium nanotubes coated with silver nanoparticles

摘要

The scope of the notification is the production of polyether sulfone and polyvinyl pyrrolidone membranes modified by titanium nanotubes coated with silver nanoparticles (Ag-TNT),as reported, the content of silver in nanomaterials in terms of 2,83 -23,21% mass and the content of Ag-TNT in terms of 1% mass compared to polyether sulfone, using the wet phase inversion method,in which a film-forming solution containing 15% mass polyether sulphone, 84% mass N,N-dimethylformamide and 1% mass polyvinyl pyrrolidone and Ag-TNT is obtained by combining the polyether sulfone and polyvinyl pyrrolidone solution in N,N-dimethylformamide with the suspension of silver-coated nanotubes of Ag-TNT in N,N-dimethylformamide. Titanium nanotubes, coated with silver nanoparticles (Ag-TNT) are produced using hydrothermal titanium nanotubes,which is photodeposited using UVC radiation and AgNO3 is used as a silver precursor. The essence of the invention is that nanotubes with diameter 6-8 nm and length 50-200 nm are used and the silver precursor is used at concentration 2,5 -100 mmol/dm3. Ag-TNT is dispersed in N,N-dimethylformamide by ultrasonic means and the suspension obtained is then combined with a solution of polyether sulfone and polyvinylpyrrolidone in N,N-dimethylformamide. The resulting solution is mixed with ultrasound,consisting of sonication in an ultrasonic bath at temperature 20-25-c and mixing with heating in a magnetic mixture at temperature 55-60-C alternately every fifteen minutes for two hours. The obtained solution is poured onto the plate and immersed in the insoluble solution to obtain the membrane.