20.500.12556/RUL-174660 Tailoring bionanocomposite film functionality using cellulose nanofibrils and bioactive wood extractives The aim of the study was to produce biologically active biocomposite films with improved mechanical properties compared to pure poly(vinyl alcohol) (PVA) film. In a first step, two-component films were produced, namely PVA with the addition of nanocellulose. Unmodified cellulose nanofibrils (CNFs), TEMPO cellulose nanofibrils (TCNFs), and lignocellulose nanofibrils (LCNFs) were used as reinforcement, and the performance of these nanofillers with respect to the properties of PVA-based biocomposites was compared. All nanofillers improved the mechanical properties of PVA, with TCNFs providing the greatest reinforcement. The PVA biocomposite with 6% TCNF showed a 55% higher modulus of elasticity and 58% higher tensile strength than the reference film. The most thermally stable bionanocomposite among the PVA-nanocellulose biocomposites was PVA with 6% CNF; thermal degradation (T$_{onset}$) started at a temperature 4 °C higher than the reference. In order to achieve antibacterial activity of the produced three-component films, a hydrophilic extract of silver fir knotwood was added to the PVA/nanocellulose system. In addition to the antibacterial properties, the effects of the hydrophilic extract on the mechanical and thermal properties of the three-component films were also investigated. The extract led to a shift in the T$_{onset}$ towards higher temperatures, with the higher content having an even greater effect. The addition of 4% extract to the LCNF-reinforced biocomposite increased the tensile strength by 10% compared to the PVA-LCNF biocomposite. bionanocomposite films (ligno)cellulose nanofibrils poly(vinyl alcohol) reagent TEMPO silver fir extract antibacterial properties bionanokompozitni filmi celulozne nanofibrile (ligno)celulozne nanofibrile poli(vinil alkohol) TEMPO reagent bela jelka ekstrakt antibakterijske lastnosti true false true Angleški jezik Slovenski jezik Članek v reviji 2025-10-08 11:19:01 2025-10-08 11:19:06 2026-06-08 15:59:33 0000-00-00 00:00:00 2025 0 0 Str. 8239–8261 iss. 14 Vol. 32 2025 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 0000-00-00 630*8 1572-882X 10.1007/s10570-025-06727-0 249890563 RAZ_Osolnik_Ursa_2025.pdf RAZ_Osolnik_Ursa_2025.pdf 1 E26702E133260E4CE83AFB85FCE6CBC7 73ea909ac2769603cf5573829d5e52cd19aa56be76c6af850081bcb0370168cf bf597248-a428-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=219523 https://link.springer.com/article/10.1007/s10570-025-06727-0 1 9be12405-a427-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=219518 Biotehniška fakulteta 0 0 0