20.500.12556/DKUM-98308 Mehansko in kemijsko recikliranje plastomagnetov z matico na osnovi polimlečne kisline magistrsko delo Mechanical and chemical recycling of bonded magnets with a polylactic acid-based matrix Magistrsko delo primerja mehansko in kemijsko recikliranje plastomagnetov na osnovi PLA/Nd-Fe-B. Vzorci so bili izdelani z ekstruzijo in injekcijskim brizganjem. Opravila se je karakterizacija magnetnih in mehanskih lastnosti. Mehansko recikliranje je obsegalo večkratno mletje in termo-mehansko preoblikovanje, kemijsko pa hidrolizo PLA v vodni raztopini etanola pri povišani temperaturi. Rezultati mehanskega recikliranja kažejo, da mehanske lastnosti z naraščanjem števila reciklažnih ciklov postopoma upadajo, magnetne pa so skoraj nespremenjene. Pri kemijskem recikliranju se mehanske lastnosti relativno dobro ohranijo, magnetne pa izraziteje degradirajo kot posledica oksidacije delcev Nd-Fe-B. Hidroliza se izkaže kot učinkovita metoda ločevanja prahu od matice, za ohranitev magnetnih lastnosti bi bilo potrebno delce Nd-Fe-B zaščititi pred oksidacijo. The master's thesis compares mechanical and chemical recycling of PLA/Nd-Fe-B-based plastic magnets. The samples were produced by extrusion and injection molding. Characterization of magnetic and mechanical properties was performed. Mechanical recycling involved repeated grinding and thermo-mechanical reprocessing, while chemical recycling involved the hydrolysis of PLA in a water/ethanol solution at elevated temperature. The results of mechanical recycling show that mechanical properties gradually decrease with an increasing number of recycling cycles, whereas magnetic properties remain almost unchanged. In chemical recycling, the mechanical properties are relatively well preserved, while the magnetic properties degrade more significantly as a result of Nd-Fe-B particle oxidation. Hydrolysis proved to be an effective method for separating the powder from the matrix; however, to preserve magnetic properties, the Nd-Fe-B particles would need to be protected against oxidation. plastomagneti polimlečna kislina recikliranje Nd-Fe-B hidroliza Polymer-bonded magnets polylactic acid recycling Nd-Fe-B hydrolysis true true false [M. Glavič] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2026-06-04 08:24:24 2026-08-12 11:34:08 2026-09-18 03:09:34 0000-00-00 00:00:00 2026 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (XIII, 72 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 [620.1:678.073-026.662]:628.477.6(043.2) 291372803 Magistrsko_delo_Marko_Glavic_(1).pdf Magistrsko_delo_Marko_Glavic_(1).pdf 1 4209D2326D5CFB1941F0287094B86FBA 628cf29cd0a28f5796b48be60183ea4e316797fe8de3b1fd5279f4c1528552d6 c8bb1185-9630-11f1-8dd1-00155d0001be https://dk.um.si/Dokument.php?lang=slv&id=209321 Fakulteta za strojništvo 0 0 0