Person: ANİŞ, PERVİN
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ANİŞ
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PERVİN
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Publication Investigation of the effects of environmentally friendly degumming methods on silk dyeing performance(Sage Publications, 2019-04-01) Aniş, Pervin; Toprak, Tuba; Yener, Eyüphan; Çapar, Göksen; ANİŞ, PERVİN; TOPRAK ÇAVDUR, TUBA; Yener, Eyüphan; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü; 0000-0001-8475-3197; AAH-3948-2021; B-5740-2017; GJY-8115-2022In this paper, firstly the effects of environmentally friendly degumming methods on the morphology and structure of fibers have been investigated. Then the dyeing behaviors of environmentally friendly degummed silk fibers were analyzed. In the dyeing process, acid and reactive dyes were used at various dye concentrations. To analyze dyeing characteristics of these fibers, investigations of washing fastness and measurements of color parameters were carried out. Scanning electron microscopy (SEM) images of degummed silk fibers showed that the high temperature (HT) degumming method was more successful than the other methods, but the results were comparable. Weight loss values were also supported by SEM images. Scanning electron microscopy with energy-dispersive X-ray analysis of degummed fibers showed that particles remaining on the surface were the most likely to indicate sericin residue. Fourier transform infrared spectra of raw and degummed fibers with different methods demonstrated typical absorption bands appointed to the peptide bonds (-CONH-) and no major differences were observed. When band intensity was examined, the most intense bands belong to the HT degumming process. The differential scanning calorimetry curves of conventionally and alternatively degummed silk fibers showed two endotherms at around 100celcius and 320celcius because of water loss and beta-sheet fibroin decomposition, respectively. The acid and reactive dyeing of the degummed fibers by environmentally degumming methods gave similar color strength and washing fastness values compared with conventionally degummed fibers.Publication Sericin assisted eco-friendly reactive dyeing for cotton fabric(Springer, 2019-07-01) Aniş, Pervin; Toprak, Tuba; Kutlu, Egemen; ANİŞ, PERVİN; TOPRAK ÇAVDUR, TUBA; Kutlu, Egemen; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü; 0000-0001-8475-3197; KSM-4304-2024; B-5740-2017; AAH-3948-2021A large amount of salt has been used in reactive dyeing of cotton. In this study, the reduction in the amount of salt used in reactive dyeing of cotton fabric after the sericin application by different methods was investigated in detailed. The effects of different cross-links (citric acid and butane tetracarboxylic acid) for the bonding of the sericin to the cotton fabric were also investigated. The results were evaluated in terms of color coordinates and color strength, washing and rubbing fastness, and crease recovery angle. Presence of the sericin onto cotton fabric after the application was evidenced with FT-IR spectra. The application of sericin and subsequent dyeing resulted in similar color depths to the conventional dyeing even with half the salt used in conventional reactive dyeing. The presence of cross-links in the pre-treatment baths did not reveal significant differences in color strengths compared to used only sericin. The fastness values of reactive dyed fabrics after sericin application had similar fastness values with traditional dyed ones. Crease recovery angles showed an increase after sericin pre-treatment. Sericin application before reactive dyeing could be one of the best alternative ways to reduce salt usage in reactive dyeing.[GRAPHICS].Publication The effects of the combined process of enzymatic bleach clean-up, enzymatic defibrillation and dyeing on the comfort and physical properties of tencel/cotton knitted fabrics(Sage Publications Ltd, 2019-11-11) Sardağ, Sibel; ŞARDAĞ, SİBEL; Toprak, Tuba; TOPRAK ÇAVDUR, TUBA; Anis, Pervin; ANİŞ, PERVİN; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Tekstil Mühendisliği Bölümü.; 0000-0001-9177-0059; 0000-0001-8475-3197; AAH-3948-2021; B-5740-2017; AAY-8629-2021This study aimed to investigate the comfort and physical properties of raw and finished knitted fabrics made of yarns with different Tencel/cotton blend ratios. For this purpose, Ne 20 yarns were produced with the same twist coefficient on the same production line. Fabric samples were produced on the same knitting machine. The raw fabrics were subjected to two different combined enzymatic pre-treatments and dyeing processes. In the first process, enzymatic defibrillation and dyeing were carried out in the same bath. In the second, enzymatic bleach clean-up, defibrillation and dyeing were conducted in the same bath. The comfort and physical properties of all the raw and finished fabric samples were measured according to the relevant standards. The results were assessed statistically. The results of this study showed that with increased percentage of Tencel in the blend, the water vapor and air permeability, fabric roughness, pilling, thermal absorption and loss of mass values of the fabrics increased, whereas thermal conductivity values decreased. It was observed that the fabrics which were subjected to enzymatic defibrillation and dyeing processes in a single bath gave lower surface roughness and abrasion values but higher air permeability values; while those subjected to enzymatic bleach clean-up, defibrillation and dyeing in a single bath gave higher thermal conductivity and thermal absorptivity values. Comparison of the two processes showed that there were no significant differences in the pilling and the water vapor permeability values obtained from both processes.Publication Dyeing properties of orgonobase-induced poly(ethylene terephthalate) fabric(Sage Publications, 2020-05-21) Toprak, Tuba; Aniş, Pervin; TOPRAK ÇAVDUR, TUBA; ANİŞ, PERVİN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölüm; 0000-0001-8475-3197; 0000-0002-6295-637X; B-5740-2017; AAH-3948-2021Polyester is the most used of the synthetic fibers used in the textile industry. Nonetheless, due to its structure, the use of only disperse dyes for dyeing creates a significant weakness in its coloring. In this paper, the utilization of reactive and acid dyes in the dyeing of polyester after chemical modification with guanidine-based polymer is investigated. The dyeing of poly(ethylene terephthalate) (PET) fabrics with reactive and acid dyes was succeeded via modification with guanidine-based polymer. The effects of this polymer on disperse dyeing were also investigated. The effect of various parameters such as temperature, duration, pH, different amounts of salt and alkaline, the different dyes and processes were investigated for modifying and dyeing PET. The optimum parameters for reactive dyeing were found to be modification and dyeing in the same bath at 100 degrees C for 60 minutes without salt and alkaline, for which the obtained color strength (12.87) was higher than that of conventional disperse dyeing with carrier (10.43). In addition, polymer modification at 130 degrees C for 60 minutes before disperse dyeing provided higher color depth (24.39) than dyeing of PET by the conventional disperse high temperature method (22.48). Color fastness in laundering and the perspiration of modified and reactive dyed fabrics reached good to excellent levels (4/5). The modified and dyed samples were characterized using Scanning Electron Microscopy and Fourier Transform Infrared. Tensile tests and flexural rigidity tests for modified and reactive dyed samples were also conducted. The results indicate that the quality of the beginning material was not degraded after being modified and dyed.Publication The effect of enzymatic modification on the dyeability of polyester fabric with reactive dye(Amer, 2020-11-01) Toprak, Tuba; Anis, Pervin; TOPRAK ÇAVDUR, TUBA; ANİŞ, PERVİN; Bursa Uludağ Üniversitesi; 0000-0001-8475-3197; AAH-3948-2021; B-5740-2017The inert chemical structure of poly(ethylene) terephthalate (PET) prevents its dyeability with reactive dyes. In this study, the reactive dyeability of polyester fabrics after enzymatic surface modification with different lipases and cutinase was investigated. The reason for the hydrophilicity of the fiber after enzymatic treatment was thought to be functional groups produced after this process, but their peak intensities in Fourier transform infrared spectroscopy (FTIR) were low and shaded by other functional groups. Scanning electron microscopy (SEM) showed that the enzymatic treatment did not cause any surface damage. A slight staining (K/S = 0.30) of the PET fabrics with the reactive dye occurred after enzymatic treatments. Moreover, the fastness to washing and rubbing of the reactive dye stained fabrics were good to excellent.Publication 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; 0000-0001-8475-3197The 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.Publication Oxygen-enriched nanobubbles for a green reactive washing process(Sage Publications Inc, 2022-05-01) Aniş, Pervin; Toprak-Çavdur, Tuba; Çalışkan, Naime; ANİŞ, PERVİN; TOPRAK ÇAVDUR, TUBA; Çalışkan, Naime; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Orhaneli Meslek Yüksekokulu.; 0000-0001-8475-3197; B-5740-2017; AAH-3948-2021; CIQ-9274-2022In this study, we used the new nanobubbles technology to create a green reactive washing process for the textile industry, as one of the most polluting sectors where environmentally friendly process designs are indispensable to protect the environment. With this technology, the possibility of eliminating the soaping-off step from the reactive washing sequence was investigated. For the design of an environmentally friendly reactive washing process, the effects of increasing the process temperature of the soaping-off step as well as the use of oxygen-enriched NBs in all washing steps after reactive dyeing with three different dyes were investigated. The results were evaluated by comparing the color coordinates, strength, and fastness of dyed cotton towels washed according to the conventional and alternative processes as well as examining the absorbance and chemical oxygen demand values of the washing baths. Alternative washings did not cause significant differences in color coordinates, while the lowest color strength and highest fastness values were obtained after washing with nanobubbles. The absorbance graphs showed that the most colorful baths belonged to the first bath of the nanobubble washing regime. Chemical oxygen demand measurements revealed that the alternative washing systems were more environmentally friendly than the conventional ones. Based on the results of this study, we concluded that it was possible to implement more eco-friendly washing methods by eliminating the use of soap.[GRAPHICS].Publication Enzymatic bleaching of cotton fibres with laccase/mediator systems combined with oxygen and ozone(Pamukkale Üniversitesi, 2008-01-01) İnkaya, Tuba; Eren, Hüseyin Aksel; Aniş, Pervin; EREN, HÜSEYİN AKSEL; ANİŞ, PERVİN; Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; 0000-0003-3908-5139; AFL-4209-2022; AAH-3948-2021Enzymes should be used in every step of pretreatment of cotton textiles in order to minimize energy and water consumption while keeping the effluent control within the tolerable standards. It has been investigated whether enzymatic bleaching of cotton textiles could be replaced with hydrogen peroxide bleaching, which is a water and energy consuming step. In this study, fungal laccase, laccase moderator systems and also oxygen and ozone feed to these systems have been experimented. The initial whiteness of the desizied fabric before bleaching was 49 stensby degree. This value did not increase over 51 stensby degree by use of enzyme and also enzyme moderator systems. Oxygen and ozone feeding at a gas flow rate of 1000 ml/min and ozone concentration of 32 mg/min have been conducted in order to increase whiteness. Oxygen feed did not have a considerable effect and whiteness degrees raised up to only 51 stensby degree, however, ozone feed enhanced to raise the whiteness of the fabric upto 68 stensby degree by enzyme alone and 70 stensby degree by enzyme moderator systems.Publication Environmentally friendly reactive washing process: A case study(Sage Publications Inc, 2022-09-01) Calışkan, Naime; TOPRAK ÇAVDUR, TUBA; ANİŞ, PERVİN; Anis, Pervin; Çalışkan, Naime; Bursa Uludağ Üniversitesi/Orhaneli Meslek Yüksekokulu.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; 0000-0001-8475-3197; B-5740-2017Available and clean water resources in the world are decreasing day by day. Textiles is one of the industries that are consuming the highest volumes of water. For this reason, it is necessary to develop environmentally friendly textile processes within the scope of sustainability. Reactive dyeing is followed by a washing process consisting of many steps to remove unfixed/hydrolyzed dyes, which is the most preferred dyeing in the coloring of cotton products. A high amount of water is consumed in these processes. In this study, an alternative washing process was developed instead of the conventional reactive washing process. The baths, which were decided to be used according to the transmittance values of the washing baths after dyeing in light, medium, and dark shades, were used again as the first two baths of the next washings. Alternative washing did not have a negative effect on the quality parameters, namely washing and rubbing fastnesses. As a result, it was observed that the last two baths of the washing cycle could be used as the first two baths of the next washing cycle. In this case, it was predicted that approximately 40%-50% water savings could be achieved.Publication Investigation of the effects of reactive dyes functionality on dyeing behaviors of fabrics and the environment(Gazi Univ, Fac Engineering Architecture, 2023-01-01) TOPRAK ÇAVDUR, TUBA; ANİŞ, PERVİN; Anis, Pervin; Çalışkan; Bursa Uludağ Üniversitesi/Orhaneli Meslek Yüksekokulu.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; 0000-0001-8475-3197; B-5740-2017Reactive dyes are most commonly used for dyeing of cotton which is the most preferred natural fiber. Although these dyes have many advantages such as wide color gamut, bright colors and being able to be applied in different ways, they have some disadvantages such as losing their dye properties by hydrolysis, remaining hydrolyzate in the liquor and on the fiber surface, and requiring long and costly washing processes to remove hydrolyzates. Various dyes modifications have been conducted within the scope of environmentally friendly production in reactive dyeing. In this study, the dyeing behavior of cotton using dyestuffs with different functional group numbers developed for this purpose and the properties of these dyes in washing wastewater solutions were investigated. The dyeing behaviors of fabrics dyed with reactive dyes with mono-, bi-and tri-functional group numbers were evaluated by colorimeter and color strengths. The absorbance and transmittance measurements of the wastewater of all baths of the reactive washing processes were performed. Despite using dye at the same concentration, higher color depth and similar fastness values were obtained with tri-functional dyes compared to the others. All of the tri-functional reactive washing baths had higher transmittance values than those of the others, except for the first one. It was thought that this could have been explained by the tri-functional dye was fixed to the fiber at a higher rate than the others. In addition, the gradually increasing transmittance values of tri-functional reactive washing wastewater were interpreted as contributing to sustainability by increasing the possibility of reuse of the final wastewater baths or reducing the number of washing baths.