Browsing by Author "Uysal, Serkan"

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    Dyeing behavior and characterization of recycled cotton and chitosan blended fabrics
    (Taylor & Francis Inc, 2022-07-11) Uysal, Serkan; Toprak-Çavdur, Tuba; TOPRAK ÇAVDUR, TUBA; Anis, Pervin; ANİŞ, PERVİN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi; Bursa Uludağ Üniversitesi/Orhaneli Meslek Yüksek Okulu.; 0000-0001-8475-3197; AAH-3948-2021; B-5740-2017; 0000-0001-8475-3197
    The cultivation and wet processing of cotton is very harmful to the environment. Recycling of cotton is an important way to reduce its environmental impact. For this purpose, recycled cotton by using it in a mixture with chitosan yarns and the dyeing behavior of fabrics produced from this blend were examined within the scope of sustainable production. Among the reactive, direct and acid dyeings, the highest color depths were obtained from dyeing with direct dye in alkaline medium and in the presence of salt. It was observed that the dyeing temperature was important for leveling dyeing. The fastness results of reactive dyeing were higher than the others. The FTIR analysis interpreted as that polyester might have been mixed during processing into recycled cotton and the presence of chitosan in the blend could be indicated by decreasing band intensities compared to cotton. The SEM images supported the presence of chitosan in the blended fabric. According to the TGA results, the change in temperature at which the maximum weight loss was observed in the blended fabric approached to that of chitosan. The results showed that chitosan and cotton obtained from recycling could be used as a mixture instead of cotton.
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    Publication
    Dyeing recycled cotton fibers using curcuma longa and pterocarpus santalinus natural dyes and bio-mordant chitosan
    (Taylor & Francis Inc, 2022-08-07) Uysal, Serkan; Gisbert-Paya, Jaime; Toprak-Çavdur, Tuba; TOPRAK ÇAVDUR, TUBA; Bursa Uludağ Üniversitesi/Orhaneli Meslek Yüksekokulu.; 0000-0001-8475-3197; B-5740-2017
    Problems such as the depletion of natural resources and the increase in environmental pollution brought about by industrialization, the concept of recycling gained great importance. Natural dyes have gained importance again with the increase in environmental awareness. For this purpose, the dyeability of recycled cotton yarns with natural dyes was examined in order to both protect natural resources and reduce the waste water load in dyeing. The paper also discussed a comparison between different ways to mordant cotton with different molecular weight chitosan. Although it was seen by FTIR analysis that cotton fibers were dyed, the presence of chitosan could not be clearly seen. It was explained by the use of low amounts of chitosan. It was observed that the mordanting processes performed with chitosan contributed to the increase in the color strengths, and higher color depths were obtained with the increasing chitosan concentration. Simultaneous mordanting in Curcuma longa dyeing, mordanting before Sandalwood dyeing provided higher color depths than others. The washing fastness of the samples dyed with Curcuma longa revealed the necessity of fastness improvement processes. It was concluded that chitosan mordanting process was effective in terms of sustainable natural dyeing, but it was necessary to improve fastness.