Seyda Eyupoglu

Prof. Dr. Seyda Eyupoglu

orcid

Research Focus & Metrics

Academic Career Length

11Years (2016-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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6 October 2021 in Journal of Natural Fibers
Verified
Journal Article
Closed access
SESeyda Eyupoglu
Seyda Eyupoglu
NMNigar Merdan
Nigar Merdan
In this study, novel cellulosic fiber was obtained from Lavandula spp. (lavender) plant stem. The physico-chemical, morphological, thermal, and mechanical behaviors of lavender fibers were characterized. The energy dispersive X-ray analysis result of lavender shows that the fibers comprise of carbon (52.79%), oxygen (47.14%), and calcium (0.07%). Fourier transform-infrared analysis revealed that lavender fibers consist of cellulose and X-ray diffraction analysis indicates that lavender fiber has 65% crystallinity index. The thermogravimetric analysis shows that the lavender fibers are stable to 362.99°C. Young’s modulus, tensile strength, and elongation at break of single fiber were obtained from the tensile test as 7.68–4.82 GPa, 226.65 MPa, and 2.94–4.69%, respectively.

9 June 2023 in Coloration Technology
Verified
Journal Article
Open access
Can EyupogluCan Eyupoglu
Can Eyupoglu
SESeyda Eyupoglu
Seyda Eyupoglu
NMNigar Merdan
Nigar Merdan
ZBZeynep Omerogullari Basyigit
Zeynep Omerogullari Basyigit
In this study, the ecological dyeing process of wool fabrics was investigated. Wool fabric samples were treated with atmospheric pressure plasma‐jet and corona discharge plasma to modify the surface to make the process sustainable and greener. The samples were dyed with the aqueous extract procured from the powdered roots of Rubia tinctorum L. (madder) using the ultrasonic‐assisted method. Scanning electron microscopy and Fourier Transform–infrared analysis were performed to investigate the effect of plasma treatment on the physical and chemical properties of wool fibres. The effects of plasma treatment type, plasma treatment parameters and the duration of dyeing on colorimetric and fastness properties were investigated. The etching of the wool fibre surface and roughness after plasma treatment were proven with scanning electron microscopy images. The Fourier Transform–infrared spectra showed that no significant differences in the functional groups of wool fibre occurred after plasma treatment. The experimental results proved that plasma treatment parameters and dyeing time had an effect on the colorimetric and fastness properties of the samples. Furthermore, an artificial neural network model was proposed for estimating the dyeing properties of wool fabrics, namely, L, a, b, K/S, colour change, rubbing fastness (dry) and rubbing fastness (wet). The experimental results show that the proposed model achieves regression values greater than 0.97 for all dyeing properties. The proposed model is successful and can be efficiently used for estimating the dyeing characteristics of wool fabrics.

4 February 2025 in Fibers and Polymers
Verified
Journal Article
Open access
PDF file
SESeyda Eyupoglu
Seyda Eyupoglu
CECan Eyupoglu
Can Eyupoglu
NMNigar Merdan
Nigar Merdan
In this research, green dyeing treatment of wool fabrics was examined with natural dye extracted from Beta vulgaris (beetroot) with an ultrasonic-assisted method. Wool fabric samples were treated with ascorbic acid, sodium carbonate, and tannic acid with different concentrations and durations via the ultrasonic-assisted method before dyeing treatment. The usability of ascorbic acid, sodium carbonate, and tannic acid was investigated as a bio-mordant agent in the natural dyeing process. After the pre-treatment with different substrates, the samples were colored with the natural dye obtained from beetroot for 5 min with the ultrasonic-assisted method. The dyeing parameters’ effects were investigated on the colorimetric and fastness properties. According to the results, Fourier transform infrared spectra indicate that there are no important dissimilarities in the functional groups of wool fabric samples with the pre-mordanting process. The experimental results show that ascorbic acid, sodium carbonate, and tannic acid are used as bio-mordants. Furthermore, the pre-mordanting process, mordant agent type, mordant concentration, and mordanting time had an effect on the fastness and colorimetric behaviors of the samples. Color strength results demonstrated that ascorbic acid mordant improved the color strength of the samples (K/S increased from 3.51 to 4.63), attributing darker shades (lower lightness, L) to the wool fabric. The light fastness of samples improved from 1 to 2 with the use of ascorbic acid for 15 min mordanting time. Furthermore, the best results for color change, washing, and rubbing fastness were obtained by using tannic acid as a mordant and increasing the mordanting time. In addition, the following dyeing characteristics of wool fabrics are estimated using an artificial neural network (ANN) model. In accordance with the experimental outcomes, the suggested approach obtains regression values of more than 0.97 for all dyeing characteristics. As can be shown, the suggested approach is accomplished and can be utilized effectively for predicting colorimetric properties of wool fabric. It has been concluded that the ultrasonic-assisted method is an environmentally sustainable dyeing process of textile fibers, and bio-mordants have rendered the dyeing treatment greener and more sustainable.

29 May 2020 in Journal of Natural Fibers
Verified
Journal Article
Closed access
SESeyda Eyupoglu
Seyda Eyupoglu
(known as ginger), a natural flowering plant of Zingiberaceae family, was taken to investigate its possible utilization in a textile material. Zingiber officinale fibers (ZOFs) were obtained from t... 摘要研究了姜科天然开花植物姜黄(生姜)在纺织材料中的应用. 从该植物的根中提取了生姜纤维(ZOFs). 测定了生姜纤维中纤维素、半纤维素和木质素的含量. 采用能量色散X-射线分析仪(EDX)对生姜纤维进行了元素分析. 用扫描电子显微镜(SEM)对纤维的表面形貌进行了研究. 采用傅里叶变换-红外光谱法(FT-IR)确定了生姜纤维的化学官能团. 用X-射线衍射分析了生姜纤维的结晶结构,计算了其结...

18 March 2023 in Biomass Conversion and Biorefinery
Verified
Journal Article
Closed access
PDF file
SESeyda Eyupoglu
Seyda Eyupoglu
CECan Eyupoglu
Can Eyupoglu
NMNigar Merdan
Nigar Merdan

15 January 2024 in Biomass Conversion and Biorefinery
Verified
Journal Article
Open access
PDF file
SESeyda Eyupoglu
Seyda Eyupoglu
Can EyupogluCan Eyupoglu
Can Eyupoglu
NMNigar Merdan
Nigar Merdan
The main aim of this study is to identify a new sustainable plant-based fiber extracted from the reddish shell bean plant to investigate its usage in polymer matrix composites. Natural reddish shell bean fiber was extracted from vegetable shells with a biological degradation method. To determine the fiber characteristic properties, physical, chemical, and instrumental tests were performed on reddish shell bean fiber. The surface of the sample was determined with a scanning electron microscope, and it shows that the fiber has a rough surface along its length. In addition, an image processing approach was devised and implemented to determine the average fiber diameter of the reddish shell bean fiber. The elemental composition of fiber was obtained as 50.67 wt.% oxygen, 47.89 wt.% carbon, and 1.52 wt.% calcium with an energy disperse X-ray analysis device. In addition, fiber diameter was predicted as 785.87 μm with the image processing technique. The fiber density was measured as 1080 kg/m3. The crystallinity index of reddish shell bean fiber was calculated as 57%, and the fiber stables up to 328.23°C. The ultimate tensile strength of reddish shell bean fiber was obtained as 111 MPa. The elongation at break and estimated values of Young’s modulus of reddish shell bean fiber are 1.83% and 6.11 GPa, respectively. According to the results, reddish shell bean fiber can be utilized as reinforcement in polymer matrix composites.