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Stały URI dla kolekcjihttp://hdl.handle.net/11652/4411

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20223

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Autorsearch.filters.applied.operator.equals: search.filters.author.Wiener, JakubMa przypisane plikisearch.filters.applied.operator.equals: Tak

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Teraz wyświetlane 1 - 3 z 3
  • Pozycja
    Comparative evaluation effects of thermal degradation, burning behavior, and intumescent char formation of cotton fabrics coated with alkaline and acidic casein solutions
    (Wydawnictwo Politechniki Łódzkiej, 2022) Faheem, Sajid; Nahid, Nazia; Wiener, Jakub; Mazari, Adnan; Baheti, Vijay; Militky, Jiri
    The present research work was aimed to investigate and study the effect of coatings of different concentrations and pH of aqueous casein solutions on thermo-oxidative properties, flame retardant performance, and intumescent char formation phenomenon of cotton fabrics. The flame retardant behavior of fabric samples was found to increase with an increase in the concentration of casein solutions in both alkaline and acidic pH conditions. The casein solution of acidic pH was found to yield more char residue than the alkaline casein solution, which evinced their better thermo-oxidative properties. The SEM micrographs of char residues also revealed the formation of stronger and coherent char with the presence of intumescence. Furthermore, the phenomenon of intumescence was largely observed in the case of cotton fabric samples coated with acidic casein solution.
  • Pozycja
    In-situ green synthesis of zinc oxide nanoparticles (ZnO NPs) onto the cotton fabrics by neem (azardirachta indica) leaf extract
    (Wydawnictwo Politechniki Łódzkiej, 2022) Javed, Asif; Wiener, Jakub; Saskova, Jana; Militky, Jiri
    This research work was carried out for the green in-situ synthesis of ZnO nanoparticles onto the 100% cotton fabric. Zinc nitrate hexahydrate [Zn(NO3)2.6H2O] was used as precursor and the Neem (Azardirachta Indica) leaf extract was used as reducing agent. Scanning electron microscopy (SEM) and X ray diffraction (XRD) were done to investigate the surface morphology and characteristics of developed samples. Moreover the ultraviolet protection factor (UPF), UVA blocking %age, UVB blocking %age, and antibacterial properties were examined. The SEM and XRD confirmed the deposition of ZnO NPs onto the fabric having crystalline structure. The evaluated samples showed very excellent results for, UPF rating, UVA blocking %age, UVB blocking %age, and antibacterial properties.
  • Pozycja
    Thermal behavior of a multi-layer laminated fabric containing PCMS
    (Wydawnictwo Politechniki Łódzkiej, 2022) Yang, Kai; Zhang, Xiuling; Wiener, Jakub; Venkataraman, Mohanapriya; Zhu, Guocheng; Yao, Juming; Militky, Jiri
    Phase change material (PCM)-incorporated fabrics have been developed for personal temperature regulation. To avoid leakage of melting PCMs from the fabric, various methods have been developed, including microencapsulated PCM (MPCMs), form-stable PCMs (FSPCMs) and solid-solid PCMs (SSPCMs). However, the poor physical property and the limited thermal behavior of such materials are found. To keep the thermal behavior of PCM-incorporated fabrics without leakage as high as possible, a multi-layer PCM fabric consisting of PEG-coated viscose fabric and PA 6-laminated fabric was proposed in this work. The leakage and thermal buffering effect of the multi-layer laminated fabric containing PEG were investigated. As a result, the PA 6-laminated fabric successfully resisted against the melting of PEG and no leakage was found. Correspondingly, the thermal buffering effect was found. We propose that this work provides a facile method to fabricate PCM fabrics and extends the application of laminated fabrics.