20.500.12556/DKUM-94375 Fragmentacija različnih polimernih materialov v tleh magistrsko delo Fragmentation of various polymeric materials in soil Raziskava obravnava fragmentacijo netkanih materialov PET (polietilen tereftalat), MER (melaminska epoksi smola) in viskoze, PET vlažilnih robčkov, PLA (polimlečna kislina) folije, PET in rPET (reciklirani polietilen tereftalat) folij ter HDPE (polietilen visoke gostote) in rHDPE (reciklirani polietilen visoke gostote) plastenk v kontroliranih okoljskih pogojih v tleh. Vzorci so bili izpostavljeni tlem 1, 3 in 6 mesecev ter analizirani z gravimetričnimi meritvami, optično mikroskopijo, FTIR spektroskopijo, termogravimetrično analizo (TGA) in goniometrijo za oceno hidrofilnosti/hidrofobnosti površine pred in po fragmentaciji. Rezultati kažejo, da netkani materiali v obliki vlaken, zlasti MER in PET vlakna, fragmentirajo bistveno hitreje kot folijski in embalažni materiali zaradi večje specifične površine in hidrofilnosti. Med folijami se PLA razgrajuje hitreje kot PET, rPET pa nekoliko hitreje kakor PET. Ugotovitve tega dela bistveno prispevajo k razvoju trajnostnih polimernih materialov in nadaljnjim strategijam za obvladovanje plastičnih odpadkov. Študija predstavlja pomemben prispevek k razumevanju obnašanja analizirane (bio)plastike kakor tudi razumevanju sprememb njihovih lastnosti po izpostavljenosti naravnim realnim sistemom. The study examines the fragmentation of nonwoven materials PET (polyethylene terephthalate), MER (melamine epoxy resin), and viscose, PET wet wipes, PLA (polylactic acid) films, PET and rPET (recycled polyethylene terephthalate) films, as well as HDPE (high-density polyethylene) and rHDPE (recycled high-density polyethylene) bottles under controlled environmental conditions in soil. Samples were exposed to soil for 1, 3, and 6 months and analyzed visually, then using gravimetric measurements, optical microscopy, FTIR (Fourier-transform infrared) spectroscopy, thermogravimetric analysis (TGA), and goniometry to assess the hydrophilicity/hydrophobicity of the surface before and after fragmentation. The results show that nonwoven fiber-form materials, particularly MER and PET fibers, fragment and degrade significantly faster than film-based and packaging materials due to their higher specific surface area. Among the films, PLA degrades faster than PET, with rPET degrading slightly faster than PET. The findings of this work make a significant contribution to the development of sustainable polymeric materials and to further strategies for managing plastic waste. The study also provides important insights into the behavior of the analyzed (bio)plastics and the changes in their properties after exposure to natural real-world systems. Mikroplastika fragmentacija polimerni materiali netkani materiali degradacija v tleh Microplastics fragmentation polymer materials nonwoven materials degradation in soil true true false [D. Ladić] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2025-08-14 12:42:02 2025-09-15 13:01:26 2025-11-14 03:10:44 0000-00-00 00:00:00 2025 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF ([IX], [73] f. )) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 628.4.043-044.967(043.2) 257020675 MAG_Ladic_Dalia_2025.pdf MAG_Ladic_Dalia_2025.pdf 1 748CE83872A4BAD44735B171B2A2F3FA 0d620ec64c6d9345e997ec7c19cf8f5958e5eb95fc2f5437c002c6e91c423fe6 f38d1efd-8f40-11f0-886e-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=198275 Fakulteta za strojništvo 0 0 0