20.500.12556/RUL-187062 Lepila iz tanina in furfuril alkohola Adhesives form tannin and furfuryl alcohol Raziskava je bila usmerjena v proučevanje možnosti uporabe lepil na osnovi tanina (T) in furfuril alkohola (FA) kot trajnostne alternative sintetičnim lepilom, ki vsebujejo okolju in zdravju škodljive snovi. Glavni cilj je bil določiti vpliv sestave lepilnih mešanic ter parametrov stiskanja (temperatura, čas) na strižno trdnost spojev. Detajlno so bile proučene tri mešanice: T10–FA20, T10–FA20–H1 in T10–FA20–H1,5, pri čemer je bil heksametilentetramin (H) dodan kot zamreževalec. Za hitro oceno trdnosti in dinamike utrjevanja je bila uporabljena metoda ABES (Automated Bonding Evaluation System). Za najbolj obetavno mešanico je bil predviden še strižni test po standardih SIST EN 205:2016 in SIST EN 12765:2016, ki pa je bil na koncu opravljen z dodatno lepilno mešanico T10–FA30. Rezultati ABES so pokazali izrazito naraščanje strižne trdnosti z višanjem temperature in daljšim časom stiskanja. Najvišje povprečne vrednosti strižne trdnosti so bile dosežene pri T10–FA20–H1,5, kjer je pri 150 °C in po 600 s trdnost presegla 8 N/mm². Standardni preizkus je potrdil, da se lepilo T10–FA30 lahko uvrsti v razred uporabe nekonstrukcijskih duromernih lepil C1 in tudi v razred C2, saj je bila povprečna strižna trdnost spojev 10,54 N/mm2 (priprava 1) in 10,20 N/mm2 (priprava 2). Sklep raziskave je, da so lepila na osnovi tanina in furfuril alkohola s primerno izbiro sestave in pogojev stiskanja konkurenčna nekaterim obstoječim sintetičnim lepilom in predstavljajo trajnostno alternativo z zadovoljivo mehansko trdnostjo in potencialom za izboljšanje vodoodpornosti. The research focused on exploring the potential use of tannin (T) and furfuryl alcohol (FA)-based adhesives as a sustainable alternative to synthetic adhesives containing substances harmful to the environment and human health. The main objective was to determine the influence of adhesive mixture composition and pressing parameters (temperature, time) on the shear strength of bonds. In-depth analysis was carried out on three mixtures: T10–FA20, T10–FA20–H1, and T10–FA20–H1.5, with hexamethylenetetramine (H) added as a crosslinker. For a rapid assessment of strength and curing dynamics, the ABES (Automated Bonding Evaluation System) method was applied. A shear test according to the standards SIST EN 205:2016 and SIST EN 12765:2016 was also planned for the most promising mixture, however, it was ultimately carried out with the additional adhesive mixture T10–FA30. ABES results showed a significant increase in shear strength with higher temperature and longer pressing time. The highest average shear strength values were achieved with T10–FA20–H1.5, at 150 °C after 600 s, for which the strength exceeded 8 N/mm². The standard test confirmed that the T10–FA30 adhesive can be classified into the C1 non-structural thermosetting adhesive class, and even into class C2, as the average shear strength of the bonds was 10.54 N/mm² (batch 1) and 10.20 N/mm² (batch 2). The conclusion of the research is that tannin and furfuryl alcohol-based adhesives, with appropriate selection of composition and pressing conditions, are competitive with some existing synthetic adhesives and represent a sustainable alternative with satisfactory mechanical strength and the potential for improved water resistance. ABES metoda furfuril alkohol lepila na naravni osnovi strižna trdnost tanin. ABES method bio-based adhesives furfuryl alcohol shear strength tannin. true false false [M. Pernuš] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-09 07:16:24 2026-09-09 07:16:32 2026-09-10 04:30:33 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*824.82(043.2) 287549 290503171 DIP_Pernus_Matej_2026.pdf DIP_Pernus_Matej_2026.pdf 1 B8DF1D56865663486C533390A3E6EFD9 f1516db27352b21f7494a65399ca553be07a397d67930522c2e3c1a90e2537b0 98d3ebba-ac0d-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=246498 Biotehniška fakulteta 0 0 0