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Title:Enkapsulacija hlapnih organskih spojin v nano/mikrokapsule iz biorazgradljivih in okolju prijaznih polimerov : magistrsko delo
Authors:Šandrić, Stipana (Author)
Volmajer Valh, Julija (Mentor) More about this mentor... New window
Fras Zemljič, Lidija (Co-mentor)
Plohl, Olivija (Co-mentor)
Files:.pdf MAG_Sandric_Stipana_2020.pdf (2,52 MB)
MD5: 077FD52D2A91FEF89026225EAA9D44D2
 
Language:Slovenian
Work type:Master's thesis/paper (mb22)
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract: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.
Keywords:citriodiol, enkapsulacija, mezoporozna silika, nano/mikrokapsule, hlapne organske spojine, polietilenimin
Year of publishing:2020
Place of performance:Maribor
Publisher:[S. Šandrić]
Number of pages:X, 61 f.
Source:Maribor
UDC:543.4/.5:661.16(043.2)
COBISS_ID:26703107 New window
NUK URN:URN:SI:UM:DK:MP8MJIQJ
Views:474
Downloads:55
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Categories:KTFMB - FS
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:08.06.2020

Secondary language

Language:English
Title:Preparation of environmentally friendly nano/microcapsules with the controlled release of volatile organic compounds
Abstract: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.
Keywords:citriodiol, encapsulation, mesoporous silica, nano/microcapsules, volatile organic compounds, polyethylenimine


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