20.500.12556/DKUM-86087 Razvoj novih funkcionalnih plastičnih filmov za različne produkte magistrsko delo Development of new functional plastic films for various products Plastični materiali imajo velik pomen v pakirnem segmentu za pakiranje farmacevtskih, kozmetičnih in prehrambnih produktov, kjer želimo podaljšati rok trajanja živil. Vedno večje zavedanje podjetij in potrošnikov o negativnem vplivu petrokemijske plastike na okolje in povečano tveganje za zdravje, ki ga predstavljajo sintetični aditivi v plastični embalaži, so privedli do razvoja biorazgradljive aktivne embalaže. V magistrskem delu smo želeli razviti antioksidativne, protimikrobne in biorazgradljive funkcionalne plastične filme. Folije PLA smo funkcionalizirali s premazom iz formulacije ekstrakta brina in hitozana, ki smo ga na površino folije nanesli s petimi različnimi metodami, in sicer z metodo pršenja, valjčkanja, omakanja, impregniranja in tehnologijo superkritičnih fluidov. Učinkovitost uporabljenih snovi in metod smo preučili z analiznimi metodami: FTIR, goniometrija, pregradne lastnosti – prepustnost kisika, antioksidativnost, XPS, SEM, transparentnost, protimikrobna aktivnost ter LCA in LCC analiza. Z analiznimi metodami smo potrdili odlično antioksidativno delovanje ekstrakta brina in protimikrobno delovanje hitozana. Izkazalo se je, da je za praktično uporabo z vidika okoljske in cenovne ustreznosti najprimernejši funkcionalni plastični film, kjer smo premaz nanesli z metodo omakanja. Dosegli smo odlično protimikrobno delovanje predvsem na bakterijo Staphylococcus aureus, izvrstne pregradne in antioksidativne lastnosti, potrjene s FTIR, XPS in SEM analizo, ter zelo dobre protikondenzacijske lastnosti. Plastic materials are important in the packaging of pharmaceutical, cosmetic, and food products, where we want to extend the shelf life. The increasing awareness of companies and consumers of the negative environmental impact of petrochemical plastics and the increased health risks posed by added synthetic additives in plastic packaging have led to the development of biodegradable active packaging. In the master thesis, we aimed to develop antioxidant, antimicrobial, and biodegradable functional plastic films. PLA films were functionalized with a coating made from a formulation of juniper extract and chitosan, which was applied to the film surface by five different methods, namely spraying, rolling, dipping, impregnation, and supercritical fluid technology. The performance of the substances and methods used was investigated by FTIR, goniometry, barrier properties - oxygen permeability, antioxidant capacity, XPS, SEM, transparency, antimicrobial activity, LCA and LCC analysis. The excellent antioxidant activity of juniper extract and the antimicrobial activity of chitosan were confirmed by analytical methods. The dip coated functional plastic film proved to be the most suitable for practical use in terms of environmental friendliness and cost-effectiveness. We have achieved excellent antimicrobial performance, especially against Staphylococcus aureus, excellent barrier and antioxidant properties (confirmed by FTIR, XPS, and SEM analysis) and very good anti-condensation properties. funkcionalni plastični filmi folija PLA hitozan ekstrakt brina tehnologije nanosa fizikalno-kemijske analize protimikrobna aktivnost LCA LCC functional plastic films PLA film chitosan juniper extract coating technologies physicochemical analyses antimicrobial activity LCA LCC true true false [T. Labohar] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2023-10-05 13:35:22 2023-12-06 07:59:36 2024-02-06 03:08:00 0000-00-00 00:00:00 2023 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (XVI, 110 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.023.2:[604.4:615.3](043.2) 183665667 MAG_Labohar_Tanja_2023.pdf MAG_Labohar_Tanja_2023.pdf 1 EA29120ADB024D5532A054B59AB70BCA 7ec27128905857143099e8c7e411475e037a730fea3c0990ba24d2bb22568d3b 05a551e7-92dc-11ee-9395-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=174579 Fakulteta za strojništvo 0 0 0