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Repozytorium Politechniki Łódzkiej gromadzi, archiwizuje oraz udostępnia w postaci pełnotekstowej dorobek naukowy pracowników PŁ.

Repozytorium zawiera przede wszystkim artykuły naukowe, książki, monografie, materiały konferencyjne oraz referaty, powstałe jako wynik procesów badawczych i dydaktycznych prowadzonych przez Politechnikę Łódzką.

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  • Item type:Pozycja,
    Non-linear functional polymers containing selective/cleavable bonds: Synthesis and their biomedical applications
    (Wiley, 2024) Rahimi, Mahdi; Gałęziewska, Monika; Jerczyński, Krzysztof; Wróbel, Sylwia; Pietrasik, Joanna; Orthopedic Research Laboratory, Hôpital du Sacré-Cœur de Montréal, Université de Montréal. Rahimi, Mahdi.; Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology. Gałęziewska, Monika.; Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology. Jerczyński, Krzysztof.; Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology. Wróbel, Sylwia.; Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology. Pietrasik, Joanna.
    The growing interest in functional materials has resulted in the emergence of smart polymers, demonstrating practical performance in various applications especially for biomedical purposes. The properties of functional polymers are mainly determined by the presence of functional groups that differ from those in the main chains. While some polymers are naturally active and considered functional, others require modification for enhanced impact and functionality. Many functional polymers typically have a linear backbone, but very recently the attention has been shifted towards those with specific topologies and architecture, for example, bottlebrushes, stars, dendritic polymers, and gels. Over the past few years, there has been a rising emphasis on integrating selective bonds into complex polymer structures to enhance chain scission in single macromolecules. This review captures the most recent and promising approaches to the design of non-linear functional polymers containing selective/cleavable bonds and discusses the potential of these materials for biomedical applications.
  • Item type:Pozycja,
    Emission of Total Volatile Organic Compounds from the Torrefaction Process: Meadow Hay, Rye, and Oat Straw as Renewable Fuels
    (MDPI Open Access Journals, 2025) Czerwińska, Justyna.; Szufa, Szymon.; Unyay, Hilal.; Wielgosiński, Grzegorz.; Faculty of Process and Environmental Engineering, Lodz University of Technology. Czerwinska, Justyna.; Faculty of Process and Environmental Engineering, Lodz University of Technology. Szufa, Szymon.; Faculty of Process and Environmental Engineering, Lodz University of Technology. Unyay, Hilal.; Faculty of Process and Environmental Engineering, Lodz University of Technology. Wielgosinski, Grzegorz.
    This study aims to quantify total VOC emissions and evaluate how torrefaction alters the heat of combustion of three agricultural residues. The work examines the amount of VOC emissions during the torrefaction process at various temperatures and investigates the changes in the heat of combustion of agri-biomass resulting from the torrefaction process. The process was carried out at the following temperatures: 225, 250, 275, and 300 ◦C. Total VOC emission factors were determined. The reaction kinetics analysis revealed that meadow hay exhibited the most stable thermal behavior with the lowest activation energy. At the same time, rye straw demonstrated higher thermal resistance and complex multistep degradation characteristics. The authors analyze three types of agricultural biomass: meadow hay, rye straw, and oat straw. The research was divided into five stages: determination of moisture content in the sample, determination of ash content, thermogravimetric analysis, measurement of total VOC emissions from the biomass torrefaction process, and determination of the heat of combustion of the obtained torrefied biomass. Based on the research, it was found that torrefaction of biomass causes the emission of torgas containing VOC in the amount of 2–10 mg/g of torrefied biomass, which can be used energetically, e.g., to support the torrefaction process, and the torrefied biomass shows a higher value of the heat of combustion. Unlike prior studies focused on single feedstocks or limited temperature ranges, this work systematically compares three major crop residues across four torrefaction temperatures and directly couples VOC quantifications.
  • Item type:Pozycja,
    Assessments of sustainable chemicals and bioenergy potentials of selected lignocellulosic biomass feedstocks in Poland via physicochemical characterisation and pyrolysis
    (Elsevier, 2025) Mohammad, Omar; Khan, Muhammad; Unyay, Hilal; Ślężak, Radosław; Szufa, Szymon; Onwudili, Jude A.
    The varied physicochemical properties of biomass feedstocks influence their behaviour during thermochemical conversion to produce carbon-based fuels and chemicals. In this study, five common Poland-based lignocellulosic biomass feedstocks - oxytree trimmings, pinewood sawdust, vegetal sorghum, coffee waste, and mixed forestry residues were selected for detailed characterisation and intermediate pyrolysis to assess their sustainable chemicals and bioenergy potentials. Proximate analysis showed volatile matter contents ranging from 67.9 wt% (forestry residues) to 79.4 wt% (pinewood), with fixed carbon showing the opposite trend. Intermediate pyrolysis was conducted between 400 and 600 °C in a fixed-bed reactor using fast heating rates (200–300 °C/s) and a vapour residence time of ∼2.2 min. Gas yields increased with temperature, while liquid and biochar yields decreased. Pinewood gave the highest gas yield across all temperatures, reaching 26.9 wt% at 600 °C, while forestry residues yielded the most solid products (40.6 wt% at 400 °C). Thermogravimetric analyses of the feedstocks and their biochars showed progressive devolatilisation and increasing fixed carbon, reaching 80.8 wt% for pinewood biochar at 600 °C. Liquid yields followed the trend: coffee waste > pinewood > oxytree > forestry residues > sorghum. Woody biomass gave biochars with high fixed carbon and thermal stability, suitable for carbon sequestration, soil enhancement, or use as solid fuels. Coffee waste produced nitrogen-rich biochar with potential for fertiliser use, and fatty acid-rich oils suitable for biofuel upgrading. Phenol- and sugar-rich liquids from woody feedstocks have potential uses in resins, biochemicals, and fermentation. These results support tailored pyrolysis strategies to enable the strategic valorisation of Poland's biomass resources.
  • Item type:Pozycja,
    Znaczenie jakości w gospodarce o obiegu zamkniętym
    (Wydawnictwo Politechniki Łódzkiej, 2025) Haręża, Paweł; Zarębska, Joanna (Rec.); Melski, Krzysztof (Rec.)
    (...) Celem publikacji jest ukazanie, w jaki sposób współczesna nauka o jakości może wspierać transformację gospodarki w kierunku gospodarki o obiegu zamkniętym oraz jak jakość, rozumiana w sposób wielowymiarowy, staje się punktem wyjścia do projektowania, zarządzania i oceny nowoczesnych produktów w warunkach transformacji ekologicznej. Monografia adresowana jest zarówno do środowiska naukowego, jak i praktyków zajmujących się zarządzaniem jakością, projektantów, przedsiębiorców oraz decydentów politycznych poszukujących usystematyzowanego spojrzenia na jakość w kontekście gospodarki o obiegu zamkniętym.
  • Item type:Pozycja,
    Activity of compounds of natural origin against Alicyclobacillus acidoterrestris, a common fruit juices contaminant
    (Lodz University of Technology Press, 2015) Tyfa, Agnieszka; Kunicka-Styczyńska, Alina; Dąbrowska, Justyna
    Fruit product industry struggles with emerging problem of microbial contamination with Alicyclobacillus acidoterrestris. This acidothermophilic, soil-borne and sporeforming bacterium posses ability to survive commercial pasteurization and thus may cause fruit juices spoilage. Even modern technologies are not effective enough to eliminate A. acidoterrestris from the industrial environments. The green consumer attitude and safety standards suggest adaptation of natural and safe solutions. This paper summarizes the bioactivity of compounds of natural origin which could serve as anti-alicyclobacilli preservation agents maintaining stability of fruit juices.