1881. Breaking free from PFAS : biocompatible, durable and high-performance octenyl succinic anhydride (OSA)-modified starch/chitosan coating with ZnO for textile applicationsAnja Verbič, Blaž Stres, Ivan Jerman, Barbara Golja, Ema Žagar, Vuk Martinović, Petja Logar, Gregor Lavrič, Anže Prašnikar, Blaž Likozar, Uroš Novak, Ana Oberlintner, 2025, original scientific article Abstract: The development of textile coatings as alternatives to per- and polyfluoroalkyl substances (PFAS) is a high priority due to global regulatory efforts aiming to phase out PFAS, driven by alarming environmental contamination and significant human health concerns. To address the urgent need for replacements, this research develops a health-friendly hydrophobic coating for two of the most common textile substrates, cotton and polyester. The developed coating, consisting of chitosan matrix and octenyl succinic anhydride-modified starch in synergy with ZnO, achieved water contact angles up to 132°. A successful transition to industrial application provided a translucent and homogeneous hydrophobic protection, without noticeably affecting the material's physical properties. Maintained or improved mechanical properties, supported by FTIR analysis, indicate a benign coating process that provides fiber reinforcement. Durability is demonstrated through multiple washing cycles without decrease in hydrophobicity, and high abrasion resistance (min. 20,000 cycles), winning against its commercial fluorinated counterpart. The water-repellent properties show stability over a longer period of time (min. 230 days). The biodegradability study confirmed the environmental compatibility as the biopolymer coating decomposed in 8 days. Finally, multivariate statistical analysis determined an optimal coating process to ensure effective integration of the newly developed sustainable coating into textile manufacturing processes.
Keywords: chitosan, octenyl succinic anhydride, modified starch, biopolymer, hydrophobic coating, functional textile
Published in DiRROS: 20.06.2025; Views: 558; Downloads: 346
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1885. How do Serbian gymnastics coaches make decisions?Edvard Kolar, Saša Veličković, Rado Pišot, Marijo Možnik, Matej Tušak, 2025, original scientific article Keywords: Serbian gymnastics coaches, decision-making styles, structure, demographic characteristics, professional characteristics, experience
Published in DiRROS: 20.06.2025; Views: 455; Downloads: 284
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1886. Experimental investigations on tribological and mechanical behavior of ▫$CNTs/Al_2O_3/GNP$▫ reinforced epoxy and polyamide hybrid nanocompositesR. Veeramanikandan, Chellamuthu Sabarinathan, D. Tamilvendan, T. A. Sundaravadivel, 2025, original scientific article Keywords: wear, tensile properties, nanoindentation, CNTs, Al2O3, graphene nanoplatelets
Published in DiRROS: 20.06.2025; Views: 486; Downloads: 273
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1887. Vegetacijske in talne razmere v izbranih gozdovih Kranjskega polja v okolici Cerkelj na Gorenjskem (GGO Kranj)Valerija Babij, Lado Kutnar, Aleksander Marinšek, Rok Debeljak, Janez Kermavnar, Domen Oven, 2025, treatise, preliminary study, study Keywords: vegetacija, tla, rastišče, ekologija gozda, delavnice, Javna gozdarska služba, Slovenija
Published in DiRROS: 20.06.2025; Views: 484; Downloads: 215
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1888. Vegetacijske in talne razmere v izbranih gozdovih Paškega Kozjaka, Završ in Gornjega Doliča (GGO Slovenj Gradec)Valerija Babij, Aleksander Marinšek, Lado Kutnar, Janez Kermavnar, Suzana Podvinšek, Veronika Valentar, Ljudmila Medved, 2025, treatise, preliminary study, study Keywords: vegetacija, tla, rastišče, ekologija gozda, delavnice, Javna gozdarska služba, Slovenija
Published in DiRROS: 20.06.2025; Views: 520; Downloads: 247
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