20.500.12556/RUL-135071 Priprava mikrokapsul z različnimi površinskimi naboji Preparation of microcapsules with different surface charges Mikroinkapsulacija je priznana kot učinkovita metoda za zaščito različnih vrst aktivnih snovi na različnih področjih uporabe, kot so medicina, agrokemija, industrijske kemija in nedavno še tekstil. Ena od bolj uporabljenih tehnik je inkapsulacija z medfazno polimerizacijo, pri kateri pride do reakcije in s tem tvorjenjem stene na fazni meji med vodno in organsko fazo. Jedrni material je lahko tekoča trdna ali dispergirana snov, ki se emulgira znotraj kontinuirne faze, dokler se ne doseže želena velikost emulzije. Za tem sledi dodatek monomerov in začetek polimerizacije na fazni meji. Pomembna lastnost mikroinkapsul je njihov površinski naboj, s katerim se lahko mikrokapsule bolje oprimejo tarčne površine. V magistrskem delu smo z različnimi dodatki uspeli pridobiti mikrokapsule s pozitivnim in negativnim nabojem kot tudi mikrokapsule brez naboja, ki smo jim določili zeta potencial. Za karakterizacijo vzorcev smo izvedli še analizo na optičnem mikroskopu, gravimetrično analizo in meritev porazdelitve velikosti delcev. Za konec smo izvedli tudi impregnacijo vzorcev na tekstilne materiale, na katerih smo z metodo določanja intenzivnosti vonja preverjali sposobnost oprijema mikrokapsul z različnimi naboji. Microencapsulation is recognized as an effective method for the protection of various types of active substances in various fields of application, such as medicine, agrochemistry, industrial chemistry and, more recently, textiles. One of the most widely used techniques is encapsulation by interfacial polymerization, in which a reaction occurs and thus a wall is formed at the interface between the aqueous and organic phase. The core material can be a liquid solid or dispersed substance that is emulsified within a continuous phase until the desired emulsion size is reached. This is followed by the addition of monomers and the start of polymerization at the interface. An important feature of microcapsules is their surface charge, which allows them to adhere better to the target surface. In my master's thesis, I was able to obtain microcapsules with positive and negative charge, as well as microcapsules without charge, with various additives. Charge was determined with the zeta potential measurement. To characterize the samples, I performed analysis on an optical microscope, gravimetric analysis, and measurement of particle size distribution. Finally, I impregnated the samples on textile materials, for which I used the method of odor intensity determination to analyse the adhesion of microcapsules with different charges. mikrokapsule poliuretan-sečnina površinski naboj microcapsules polyurethane-urea surface charge true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2022-02-21 09:35:09 2022-02-21 09:35:20 2022-09-14 04:11:30 0000-00-00 00:00:00 2022 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 15521 98749443 Vrhunec_Enej_-_Priprava_mikrokapsul_z_razlicnimi_povrsinskimi_naboji.pdf Vrhunec_Enej_-_Priprava_mikrokapsul_z_razlicnimi_povrsinskimi_naboji.pdf 1 0F1EDE0BBA305D055CAB74947D5B8C4B 2c8a26a74021920813664e1b429f3e2b48ca6c0b84425b4f3e63417aa8672c74 f6b6d975-92f0-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=153924 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0