Person: YILDIZ, ZEHRA
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
YILDIZ
First Name
ZEHRA
Name
4 results
Search Results
Now showing 1 - 4 of 4
Publication Metadata only Emerging applications of photocurable polymers(CRC Press, Taylor & Francis Group, 2023-01-01) YILDIZ, ZEHRA; KOÇAK, EMİNE DİLARA; YILDIZ Z., KOÇAK E. D.Publication Metadata only Mechanical and acoustic properties of alkali treated agricultural waste reinforced sustainable polyurethane composites(2023-11-01) KOÇAK, EMİNE DİLARA; YILDIZ, ZEHRA; KOÇAK E. D., Olcay H., YILDIZ Z.In this research, polyurethane (PU) foam composites were prepared by using various agricultural waste (rice husk, corn silk, artichoke stem) particles. In order to enhance the compatibility and adhesion between the waste particle and PU matrix, alkali treatment was employed. The alkali treated particles were chemically and morphologically characterized by Fourier transform infrared (FTIR) spectroscopy, cellulose determination instrument, and scanning electron microscopy (SEM), respectively. The effects of the alkali treatment on the structural, morphological, mechanical, and acoustic properties of the overall PU foam composites were all examined. Due to the differences in chemical compositions of the agricultural wastes, the alkali treatment affected the acoustic and mechanical properties of the PU foam composites in varying ratios. The PU foam composite reinforced with alkali treated artichoke stem waste particles showed the highest tensile strength value of 265 kPa, whereas the highest sound absorption value of 40.5% as an enhancement on the acoustic properties compared to the blank PU foam composite was recorded in corn silk waste particle loaded sample.Publication Metadata only Polymers for the textile industry(CRC Press, Taylor & Francis Group, 2023-01-01) KOÇAK, EMİNE DİLARA; YILDIZ, ZEHRA; KOÇAK E. D., YILDIZ Z.Publication Open Access Sustainable fabric printing by using pre-consumed cellulosic textile wastes: The effect of waste particle content(2024-04-05) YILDIZ, ZEHRA; KARTAL, İLYAS; KOÇAK, EMİNE DİLARA; ERYILMAZ, OĞUZ; YILDIZ Z., KARTAL İ., KOÇAK E. D., Ozer B., Kus B. N., ERYILMAZ O.The textile industry generates significant amounts of waste, including yarn/fiber fluffs, fabric scraps, offcuts, etc. These wastes can be recycled and repurposed for usage in screen printing which is a versatile and cost-effective printing technique by producing high-quality prints. In this study, pre-consumed colored cotton wastes were milled into 30–70 μm particle size by using a miller. Then the colored waste particles were included in a commercial printing paste and applied on cotton fabrics via screen printing. Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) analysis, and energy dispersive spectrometer (EDS) were employed to observe the chemical changes in the printed textile fabrics. The printed fabrics were evaluated through color, wash/rub fastness, tensile strength, surface wettability, tactile, and air permeability properties. The dispersion quality of the waste particles on textile fabrics was observed by using light microscopy and scanning electron microscopy (SEM) images. The overall results demonstrate that a 10% amount of waste fibrous particle inclusion to the printing paste gave optimum results by means of dispersion quality of wastes, air permeability, and handle properties. Above 10% waste amounts, the waste particles cannot be dissipated well on the fabric surface, resulting in agglomerated and non-uniform printed areas. These findings hold substantial potential for promoting sustainable coloring applications by using colored pre-consumed textile wastes within the textile industry while maintaining high-quality fabric products.