20.500.12556/DKUM-74373 Enkapsulacija aditivov s protikorozijskim delovanjem diplomsko delo univerzitetnega študijskega programa I. stopnje Encapsulation of additives with anticorrosive action Diplomsko delo opisuje pripravo samoobnovljivih protikorozijskih premazov, ki vsebujejo mikrokapsule. Vsebina mikrokapsule se ob določenem vplivu kontrolirano sprosti na površino premaza, prekrije površino in preprečuje nastanek korozije na tem mestu. Mikrokapsule smo sintetizirali s pomočjo mešanice organske in vodne faze. Obliko in velikost kapsul smo analizirali z IR-spektroskopijo ter na vrstičnem elektronskem mikroskopu. Ugotovili smo, da imajo mikrokapsule, pripravljene z magnetnim mešalom, bolj homogeno obliko kot mikrokapsule, pripravljene s homogenizatorjem. Z merjenjem IR-spektra smo ugotavljali prisotnost aktivne komponente na ovoju in v notranjosti mikrokapsul. Ujemajoči IR-spektri silika mikrokapsul in aktivne komponente so potrdili prisotnost le te v notranjosti. Nastale mikrokapsule smo nato vmešali v premazno smolo na vodni osnovi in premaze nanesli na kovinske vzorce aluminija AA2024. Premazanim vzorcem smo izmerili kontaktne kote in izračunali prosto površinsko energijo. Izkazalo se je, da se hidrofobnost poveča, če so v premazni smoli dodane mikrokapsule z dodatkom hidrofobnih molekul. Debelino premaza smo določili z vrstično elektronsko mikroskopijo. V elektrolitski celici pa smo izmerili hitrost nastanka korozije. Iz meritev je razvidno, da so premazi z dodanimi mikrokapsulami bolj protikorozijsko učinkoviti kot premazna smola. Bachelor's thesis describes preparation of self-healing anticorrosion coatings containing microcapsules. At certain impact of external factors the content of microcapsules is gradually relleased onto the coating's surface which is then covered and protected against corrosion. We synthesized the microcapsules out of organic and water phase. We analyzed their shape and size with the use of IR spectroscopy and scanning electron microscope (SEM). Our conclusion was that the shape of microcapsules prepared with magnetic mixer was more homogeneous than those prepared with homogenizer. By measuring the IR spectrum we determined the presence of active component in the shell and in the inside of microcapsules. The matching spectrums of silica microcapsules and those of active component confirmed it's presence in the microcapsule. We then mixed the formed microcapsules into the water based resin which we applied to AA2024 aluminium. The contact angles were measured on the coated aluminium samples and free surface energy calculated. It turns out hydrophobicity of coating increases with addition of microcapsules containing hydrophobic molecules. Coating thickness was measured with SEM. The rate of corrosion was measured in an electrolytic cell. All results suggest that resins containing microcapsules are more efficient against corrosion then regular anticorrosion coating resins. mikrokapsule protikorozijski premaz samoobnovljivi material silika mikrokapsule microcapsule anticorrosion coating self healing material epoxy resin silica microcapsules true true false [T. Mihelčič] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2019-08-26 10:50:29 2019-10-10 12:40:05 2022-08-09 09:00:16 2019-10-17 03:11:06 2019 0 Maribor 0 Maribor VIII, 23 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 627.257(043.2) 22666262 URN:SI:UM:DK:B9GDCKWL UN_Mihelcic_Tina_2019.pdf UN_Mihelcic_Tina_2019.pdf 1 F951377AE65CD13B0A8962BF68307120 80b14a64a178cef329a80f8501eac469893a18cb4d16de5753fde841a10a2f41 ee476f63-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/4e8b78ce-93a1-4426-bbab-5b4630266269 https://dk.um.si/Dokument.php?lang=slv&id=137543 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0