20.500.12556/DKUM-76553 Enkapsulacija hlapnih organskih spojin v nano/mikrokapsule iz biorazgradljivih in okolju prijaznih polimerov magistrsko delo Preparation of environmentally friendly nano/microcapsules with the controlled release of volatile organic compounds Za izdelavo magistrske naloge na to temo smo se odločili zaradi porasta uporabe pesticidov v preteklih nekaj letih. Namen same naloge je bila priprava nano/mikrokapsul iz biorazgradljivih polimerov, ki služijo kot nosilci biopesticida citriodiol. V laboratoriju smo izvedli sintezo mezoporoznega amorfnega silicijevega dioksida (silike) in nadaljnjo funkcionalizacijo mezoporoznega amorfnega silicijevega dioksida z razvejanim polietileniminom, da bi dobili funkcionalne nano/mikrokapsule kot dostavni sistem pesticidov. V sintetizirane nano/mikrokapsule smo enkapsulirali biopesticid citriodiol. S pomočjo različnih analiznih meritev smo primerjali dobljene vzorce mezoporozne silike in mezoporozne silike s polietileniminom. Velikost pridobljenih kapsul smo določili s pomočjo določitve velikosti delcev, disperznega indeksa in zeta potenciala. Za določitev morfološkega izgleda kapsul in določanje poroznosti pa smo uporabili vrstično elektronsko mikroskopijo SEM in Brunauer-Emmet-Tellerovo BET metodo. Fourierjevo transformacijsko infrardečo spektroskopijo smo uporabili za pridobivanje spektrov vzorcev z namenom določitve elementarne sestave. Dokazali smo prisotnost citriodiola znotraj kapsule, ne pa na sami površini. Z metodo plinske kromatografije smo določili hlapnost citriodiola v (mg/L) v zadanem časovnem intervalu (min). Dobljeni rezultati in spoznanja tekom izdelave magistrske naloge lahko služijo kot model za enkapsulacijo komercialno zelo uporabljenega pesticida, imenovanega klomazon. The increase in the application of the pesticides in the last couple of the years has influenced the topic of this paper. The purpose of the paper was to prepare nano/microcapsules from biodegradable polymers which serve as the carriers of the citriodiol biopesticide. The synthesis of mesoporous amorphous silicon dioxide (silica) and the funcionalization of the mesoporous amorphous silicon dioxide with the polyethylenimine have been done in the laboratory to obtain functional nano/microcapsules which serve as a carrier system for the pesticides. Citriodiol biopesticide was encapsulated in the synthetized nano/microcapsules. Through different analytical measurements obtained samples of mesoporous silica were compared to mesoporous silica with polyethylenimine. The side of the obtained capsules has been determined through dispersity index and zeta potential. Scanning electron microscopy and Brunauer-Emmet-Taller method have been used to determine morphological structures of the capsules and porosity. Fourier transform infrared spectroscopy (FTIR) with attenuated total reflection (ATR) has been used to determine the spectres of samples in order to attain the element content in the samples. The presence of citriodiol has been proven inside the capsule, and not on the surface. The volatility of citriodiol (mg/L) in a limited time period (min) has been determined by using gas chromatography (GC). The results and findings obtained in the research can serve as a model to encapsulate clomaze pesticide, which is often used commercially. citriodiol enkapsulacija mezoporozna silika nano/mikrokapsule hlapne organske spojine polietilenimin citriodiol encapsulation mesoporous silica nano/microcapsules volatile organic compounds polyethylenimine true true false [S. Šandrić] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2020-06-08 08:52:39 2020-07-02 13:19:15 2022-08-09 13:41:41 2020-09-02 03:20:12 2020 0 Maribor 0 Maribor X, 61 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 543.4/.5:661.16(043.2) 26703107 URN:SI:UM:DK:MP8MJIQJ MAG_Sandric_Stipana_2020.pdf MAG_Sandric_Stipana_2020.pdf 1 077FD52D2A91FEF89026225EAA9D44D2 9c9590cd21915477c5c163641e2f97ab48e675932b2a5fe87f85f6bdbafc4d2b 62bada00-7c11-11eb-bb7a-00155d0001ca 20.500.12556/dkum/aad0b9c3-bf00-4896-b0c6-2b5ecde888e3 https://dk.um.si/Dokument.php?lang=slv&id=143337 Fakulteta za strojništvo 0 0 0