Příprava a porovnání polymerních membráns přídavkem mikro- a nanočástic kovů
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Tato práce se zabývá přípravou a charakterizací polyethersulfonových ultrafiltračních membrán s přídavkem mikro- a nanočástic oxidu zinečnatého o velikostech 13, 50, 100 a 1000 nm.Hodnoceny byly zejména antimikrobiální vlastnosti připravených modifikovaných membrán, jejich filtrační charakteristiky s demineralizovanou a zředěným aktivovaným kalem i stabilita modifikace částicemi ZnO. Dále bylo provedeno mikroskopické hodnocení povrchů i vnitřní struktury membrán, a v neposlední řadě byl měřen kontaktní úhel.Ukázalo se, že modifikace částicemi ZnO o velikosti 13 nm neměla z důvodu jejich agregace zdaleka takové antimikrobiální účinky, jak se očekávalo. Nejsilnější antimikrobiální aktivitu vykazovaly membrány modifikované 50nm a 100nm nanočásticemi, ale zároveň byla prokázána vysoká nestabilita těchto modifikací. Největší (zdaleka ne však dobrou) stabilitu a dlouhodobější antibakteriální účinky prokázala membrána modifikovaná částicemi ZnO o velikosti 1000 nm.
This work is focused on preparation and characterization of polyethersulfon membranes with the addition of zinc oxide micro- and nanoparticles. Particles sizes were 13, 50, 100 and 1000 nm in the diameter.The antimicrobial properties of the prepared modified membranes, their filtration characteristics with the demi water and with the diluted activated sludge were especially evaluated as well as the ZnO modification stability. They were also evaluated the microscopic surface and inner structure and it was measured the contact angle.The membranes modified by ZnO nanoparticles about the size of 13 nm proved much lesser antimicrobial effect, than it was expected. The reason was their aggregation. The highest antimicrobial activity was proved for the membranes modified by ZnO nanoparticles about the size of 50 and 100 nm. On the other hand the stability of those modifications was not high. The highest (but not so good) stability and the longest antimicrobial effect were proved by the micron-sized ZnO particles.
This work is focused on preparation and characterization of polyethersulfon membranes with the addition of zinc oxide micro- and nanoparticles. Particles sizes were 13, 50, 100 and 1000 nm in the diameter.The antimicrobial properties of the prepared modified membranes, their filtration characteristics with the demi water and with the diluted activated sludge were especially evaluated as well as the ZnO modification stability. They were also evaluated the microscopic surface and inner structure and it was measured the contact angle.The membranes modified by ZnO nanoparticles about the size of 13 nm proved much lesser antimicrobial effect, than it was expected. The reason was their aggregation. The highest antimicrobial activity was proved for the membranes modified by ZnO nanoparticles about the size of 50 and 100 nm. On the other hand the stability of those modifications was not high. The highest (but not so good) stability and the longest antimicrobial effect were proved by the micron-sized ZnO particles.
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antimikrobiální vlastnosti, membrána, filtrace, nanočástice, oxid zinečnatý (ZnO), permeabilita, polyethersulfone (PES), membrane, filtration, polyethersulfone (PES), nanoparticles, zinc oxide (ZnO), permeability, antimicrobial properties