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Pozycja Effect of tensile strength of lignocellulosic himalayan nettle fibers by chemical treatment(Wydawnictwo Politechniki Łódzkiej, 2022) Deepa, R.; Saravanan, K.; Kumaresan, K.; Satheeshkumar, D.The physical and chemical properties of Himalayan nettle fibers treated with sodium hydroxide and sodium chlorite solutions have been studied in this research. Nettle fibers are naturally derived, highstrength nettle yarn for the preparation of home textiles, handicrafts, and ropes. It is a high fiber-yielding plant that grows naturally in the Himalayan areas. In this study, nettle fiber samples were soaked in 4% sodium hydroxide (NaOH) and 1% sodium chlorite (NaClO2) solutions at a 100oC temperature for 90 minutes. The untreated nettle fibers were soaked in a 4% sodium hydroxide water solution at a 100oC for 60 minutes. The nettle fiber test samples were prepared and tested as stated in the ASTM standards. The average tensile strength of alkaline nettle fibers increases by upto 60% compared with untreated fiber. The mild alkali treatment increases tensile strength, cellulose content and decrease elongation break acts to be due to fiber extraction and separation of non-cellulosic materials such as hemicellulose, lignin, and pectin. Compared to untreated nettle fiber, the average young's modulus of sodium hydroxide-chlorite treated fiber was increased. Moisture sorption analysis, Fourier transform infrared spectroscopy (FTIR), single fiber tensile strength, and physical properties were used to evaluate the properties of untreated and treated nettle fibers.Pozycja Exploration and practice of textile and clothing training base construction(Wydawnictwo Politechniki Łódzkiej, 2022) Zhang, Li-feng; Chen, Gui-cuiIn order to improve vocational education level of local economy. The textile and clothing training base under Yueda Textile Industry Institute mode was built. The basic situation and construction ideas of the base were sorted out, the construction contents of the productive practical training base were established, the main measures of the base construction were defined, and the functions of the base in the aspects of practical training topics, skill appraisal, talent cultivation and production practice were realized. Further improved the technical promotion ability of the training base to serve the teachers and students, enterprise employed and opened to the whole society. The construction of an open training base for textile and garment skills would provide talent support and technical services for the development of modern textile and garment industry.Pozycja Photocatalytic desizing of pva-sized cotton fabric(Wydawnictwo Politechniki Łódzkiej, 2022) Panda, Sanjay Kumar Bhikari Charan; Sen, Kushal; Mukhopadhyay, SamratSizing is necessary for the weaving preparatory process involving coating warp yarns with a sizing agent like PVA. The sizing agent improves the weavability during the manufacturing of the cotton fabric. Before dyeing and printing the fabric, removal of the natural or added impurities is essential. Desizing is the initial step in the pretreatment of the cotton fabric, where the sizing chemicals are removed. However, desizing is a water and energy-intensive process. A green methodology is employed here for desizing PVA-sized cotton fabric using UVC in the presence of potassium persulfate as a photocatalyst to replace the hazardous chemicals used in the conventional approach. The eco-friendly technology used in this article saves time, water, and energy by 79%, 67%, and 84% of the conventional process with better efficacy of desizing.Pozycja Aerogel applications in textile materials(Wydawnictwo Politechniki Łódzkiej, 2022) Karabulut, Cengiz; Başyiğit, Zeynep Ömeroğulları; Ünsal, Cem; Toprakkaya Kut, Y. DilekThe production of materials that will provide the high-performance properties required by today's technology is important for many sectors. Apart from meeting clothing and shelter needs, there is a direct or indirect rising need for the use of advanced textile materials in many different areas. Compared to the conventional materials, aerogel materials attract attention due to their ultra-lightweight structure with superior properties such as high specific surface area, high porosity, low density, low dielectric constant, excellent sound, and heat insulation. In addition, for the functional use of aerogel materials in the industry, mechanical properties such as modulus of elasticity, tensile-compressive strength, shear modulus, and impact strength are also important. When the literature on aerogel since the early 1930s is examined, it is seen that the studies mostly focused on application areas and more economical production ways. Although the most established application of aerogels in textiles is to improve thermal insulation, it is seen that they are also used in water repellency, air and water permeability, acoustic insulation, prevention of electromagnetic radiation, protection against chemicals, flame retardancy and treatment of textile process wastes. In this article, besides general information about aerogel, current aerogel application examples in textile materials are also included.Pozycja Wool finishing for washable worsted man’s jacket(Wydawnictwo Politechniki Łódzkiej, 2022) Rhouma, Amira Belhaj; Campagne, Christine; Behary, N. Massika; François, Sébastien; Lanceron, Charles; Vieillard, JulienThe aim of this study is to functionalize a 100% worsted wool fabric for use as washable suit jackets in a household washing machine (Samsung) with the wool/delicate cycle. In fact, it is highly recommended to wash worsted suit jackets by dry cleaning in order to avoid garment shrinkage when washing. Wool is known for its shrinking properties which make it difficult to wash with water. Varying chemical finishing were applied on woven worsted fabric. The aim of this finishing was to avoid both, felting shrinkage caused by the entanglement of fibres and fabric shrinkage due to fibre release strains and stresses introduced during processing, and hence improve its dimensional stability during domestic washing. A men jacket stitched with the chemically treated fabric was worn 5 times a week before being subjected to washing. Overall, 5 domestic washing were performed. And the fabric was analysed before and after the washings. Excellent dimensional stability was obtained without any sign of physical degradation as observed by SEM. This could be explained by the good adhesion of the fibre finish coating which resist to strains of wash and wear. Physical and chemical analysis using Zeta potential measurement would suggest that padding with a mixture of polycation (polyurethane based resin) and poly anion (polysiloxane-based resin) will help improving coating adhesion and hence its resistance to wash and wear.Pozycja Experimental abrasion analysis of textile capacitive sensors(Wydawnictwo Politechniki Łódzkiej, 2022) Martínez-Estrada, Marc; Ventura, Heura; Gil, Ignacio; Fernández-García, RaúlThis paper presents an experimental abrasion analysis of textile capacitive sensors based on Martindale test. The textile sensor is manufactured with a well-known woven technology where some yarns are replaced by electrical conductive yarn. Specifically, two types of conductive yarns were used to compare the abrasion behaviour respect to conventional fabrics and the impact of abrasion on sensors functionality. The results show that the integration of conductive yarn on fabric don’t reduce the fabric lifetime and moreover the sensing behaviour remains unalterable during the lifetime of the textile.