http://hdl.handle.net/10563/1000003 2026-04-09T19:07:04Z http://hdl.handle.net/10563/1012789 Zinc phthalocyanine-functionalized polyvinyl chloride surfaces for singlet oxygen-mediated antibacterial and antiviral activity Pištěková, Hana; Pummerová, Martina; Strašáková, Monika; Dusankova, Miroslava; Novák, Martin; Kořínková, Radka; Trousil, Vojtěch; Hanušová, Dominika; Ševčík, Jakub; Domincová Bergerová, Eva; Sedlařík, Vladimír 2026-01-01T00:00:00Z http://hdl.handle.net/10563/1012780 Washable few-layer graphene-based conductive coating: The impact of TPU segmental structure on its final performances Improta, Ilaria; Rollo, Gennaro; Buonocore, Giovanna Giuliana; Fiume, Marco; Sedlařík, Vladimír; Lavorgna, Marino The development of sustainable, water-based conductive coatings is essential for advancing environmentally responsible wearable and printed electronics. Achieving high electrical conductivity and wash durability remains a key challenge. This is largely dependent on the compatibility between the polymer matrix, the conductive filler and the substrate surface. In this study, a facile formulation strategy is proposed by directly integrating few-layer graphene (FLG, 2.5 wt%) into commercial bio-based thermoplastic polyurethanes (TPUs), combined with polyvinylpyrrolidone (PVP) as a dispersing agent. The investigation focuses on how the segmental architecture of four TPUs with different structure and hard-soft segments composition influences filler dispersion, mechanical integrity, and electrical behavior. Coatings were deposited onto flexible substrates, including textiles and paper, using a bar-coating process and were characterized in terms of morphology, thermal properties, electrical conductivity, and wash resistance. The results demonstrate that TPUs containing a higher presence of hard segments interact more effectively with hydrophobic surfaces, while TPUs with a higher contribution of soft segments improve adhesion to hydrophilic substrates and facilitate the formation of the percolation network, underling the role of TPU microstructure in controlling interfacial interactions and overall coating performance. The proposed comparative approach provides a sustainable pathway toward durable, high-performance, and washable electronic textiles and paper-based devices. 2026-01-01T00:00:00Z http://hdl.handle.net/10563/1012777 Solvolysis depolymerization of additive-containing poly(lactic acid) composites for sustainable ethyl lactate production Domincová Bergerová, Eva; Císař, Jaroslav; Strašáková, Monika; Uhercová, Simona; Hanušová, Dominika; Dušánková, Miroslava; Škoda, David; Sedlařík, Vladimír; Domincová Bergerová, Eva; Císař, Jaroslav; Strašáková, Monika; Uhercová, Simona; Hanušová, Dominika; Dušánková, Miroslava; Škoda, David; Sedlařík, Vladimír The increasing use of poly(lactic acid) materials has led to growing amounts of post-consumer waste containing commonly used industrial additives that complicate end-of-life treatment. Although solvolysis represents a promising chemical recycling route for PLA, systematic comparative data quantifying the influence of common additives under relatively mild reaction conditions remain scarce. This study investigates the solvolysis depolymerization of PLA-based composites containing typical additives, including calcium carbonate (1–10 wt%), carbon black, plasticizers, cellulose, and minor polymeric components. Depolymerization was performed in an acetone/ethanol system at 70 °C using the organocatalyst 1,5,7-triazabicyclo[4.4.0]dec-5-ene, enabling recovery of ethyl lactate as a bio-based solvent. Depolymerization efficiencies ranged from 61-100 %, depending on additive form and content. High efficiencies and PLA conversion to ethyl lactate (up to 98%) were obtained for materials containing low amounts of inorganic additives (≤2 wt%), whereas cellulose-rich composites showed markedly reduced degradation and product formation. The results demonstrate that additive form and content govern depolymerization performance more strongly than crystallinity effects alone, with cellulose-rich matrices (>50 wt%) defining a practical compositional threshold for efficient chemical recycling. Structural and thermal analyses (GPC, DSC, TGA, and XRD) indicated that additives increased crystallinity and thermal stability while solvolysis remained effective at low to moderate additive loadings. This work extends solvolysis recycling strategies from virgin PLA to commercially relevant composite materials and defines compositional limits for efficient ethyl lactate production from additive-containing PLA waste. 2026-01-01T00:00:00Z http://hdl.handle.net/10563/1012788 PLA-derived lactate esters as plasma precursors for hydrophilic and antibacterial coatings Strašáková, Monika; Domincová Bergerová, Eva; Lehocký, Marián; Hanuliak, Veronika; Pištěková, Hana; Urbánek, Michal; Sťahel, Pavel; Stupavská, Monika; Klaban, Jakub; Lengálová, Anežka; Sedlařík, Vladimír 2026-01-01T00:00:00Z