Tekstil Teknolojileri ve Tasarımı Fakültesi

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http://hdl.handle.net/11527/20121

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Çıkarma tarihi ile Tekstil Teknolojileri ve Tasarımı Fakültesi'a göz atma

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  • Öge
    10. Uluslararası Lif ve Polimer Araştırmaları Sempozyumu (10. ULPAS) Bildiriler Kitabı: 13-14 Mayıs 2022, İstanbul, Türkiye: Akıllı ve teknik tekstiller / editors, Prof. Dr. Yusuf Ulcay, Prof. Dr. Ali Demir, Doç. Dr. Ali Kılıç, Dr. Gülçin Baysal, Merve Nur Sağırlı
    (İstanbul Teknik Üniversitesi, 2022) ; Tekstil Mühendisliği ; Ulcay, Yusuf ; Demir, Ali ; Kılıç, Ali ; Baysal, Gülçin ; Sağırlı, Merve Nur
    Sempozyumun ana misyonu, lif ve polimer alanındaki çalışan ve araştırmacıları kuruluşlarına ve topluluklarına sürekli olumlu katkıda bulunmaya hazırlamaktır. Uluslararası Elyaf ve Polimer Sempozyumu ULPAS (IF&PRC), sürekli büyüme şartlarına hazır, iyi eğitimli, bağımsız araştırmacıları hazırlamak için özenli bir ortamda proje çalışmalarına dayalı ve nitelikli sempozyum programları sağlamayı amaçlamaktadır. Ayrıca, Lif ve Polimer Araştırma Enstitüsü üyeleri arasında işbirliği ve koordinasyon kurmayı da amaçlamaktadır.
  • Öge
    International Textile and Fashion Congress, ITFC 2023 : proceeding book
    (İTÜ Yayınevi, 2023) Tekstil Teknolojileri ve Tasarımı Fakültesi ; Okur, Nazan ; Sarıçam, Canan ; Göcek, İkilem
    We have organized international & national congresses and R&D days for our community through-out 40 years in irregular sequences up-to-now, neverthless hereafter, our purpose is to commence a new bi-annual international textile congress series at ITU starting from year 2023 for our distinguished community in view of the fact that year 2023 is an extremely significant year for us: 250th anniversary of Istanbul Technical University, 100th anniversary of Turkish Republic and 40th anniversary of Textile Engineering Department, ITU. In the core of Istanbul, our aim is to organize a meeting point for all textile & fashion/retail researchers as well as fashion designers around the world at the Department of Textile Engineering at Gumussuyu/Beyoglu. We are expecting to strengthen connections with our colleagues, industry members and professionals from across the world, along with sharing our knowledge and experience on innovative textiles and fashion trends tackling global challenges at a new era after pandemics. Thus, we aim to mention the importance of textile in all global struggles that have affected the whole world since 2019 and to witness the latest developments in textile & fashion.
  • Öge
    Development of biodegradable poly(butylene succinate) based nanofibrous webs via solution-blow spinning technology for N95 respiratory filters
    (Springer, 2024) Pakolpakçil, Ayben ; 0000-0002-6981-4980 ; Tekstil Mühendisliği
    As a result of the COVID-19 outbreak, millions of people are wearing face masks (including disposable surgical face masks), and many used masks, particularly disposable masks, are entering the environment and increasing pollution. The applicability of nanofibers in the field of filtration is considerable, and it has replaced environmentally friendly materials in research in this area. Solution-blown spinning (SBS) is an efficient and straightforward method for creating micro and nanofibers that allow quick fiber deposition on any substrate. Poly(butylene succinate) (PBS) is an environmentally safe biopolymer with unique properties, such as processability and flexibility, that has piqued the interest of industry and researchers. Hence, an eco-friendly air filter based on PBS nanofibers was fabricated using SBS. This solution-blown spun PBS filter was demonstrated as an air filter for the first time. The findings demonstrated that a weight of around 19.3 g/m2 PBS webs with a mean diameter of 199 nm was adequate to produce a filtering performance of 95.26% with a pressure drop of 251 Pa at a flow rate of 85 L/min. The fast and economic features of the SBS process, as well as the environmentally friendly nature of the PBS polymer, may be a considerable contribution to the development of green filters.
  • Öge
    Utilization of poplar fibers in needle punched nonwovens
    (Springer, 2024) Usta, Canan ; Seyhan, Aybeniz ; Gürarslan, Alper ; Tekstil Mühendisliği
    The focus of this study is to conduct pioneering research on utilizing poplar seed hair fibers in needle punched nonwovens. These fibers were blended with hollow PET fibers at two different weight ratios to obtain needle punched webs for the first time. The weight, thickness, abrasion resistance, bursting and tensile properties, hydrophobic/oleophilic surface characteristics of the nonwovens are analyzed elaborately. Finally, it has been demonstrated that poplar fiber-containing nonwovens have superior rose oil absorption compared to solely PET nonwoven fabrics. When compared the maximum adsorption capacities, the incorporation of 37.3 wt.% and 21.7 wt.% poplar fiber into PET nonwoven increased the oil absorption by approximately 35 and 24 times, respectively. Although pristine PET nonwoven was able to remove only 16% of MB dye from aqueous dye solution, addition of poplar fiber enhanced the removal process and the solution had been decolorized to nearly colorless. The results indicated that poplar blended nonwoven fabrics treated with NaClO2 show the high-performance removal of MB dye from wastewater, with the increased percentage of 40% and 67% for PET-PO30 and PET-PO60 fabric, respectively. Therefore, developing industrial scale surfaces with non-traditional and sustainable poplar seed fibers, marks a significant advancement for the textile industry.
  • Öge
    Thermally powered soft gripper covered with silver-coated nylon fabric heater reinforced with stainless steel yarn
    (Wiley, 2024) Taherkhani, Bahman ; Çelebi, Mehmet Fatih ; Çetin, Münire Sibel ; Tunçay Atalay, Aslı ; Ince, Gökhan ; Atalay, Özgür ; Tekstil Mühendisliği
    Soft grippers, generating movement immediately, are generally based on flexible materials actuated by air pressure and comprised of bulky parts, including valves, compressors/pumps, motors, and tubes. In this work, a compact soft gripper with the ability to actuate with a low boiling point liquid (acetone) is presented. SolidWorks 2021 software and 3D printing technology are used to design and manufacture the gripper molds, respectively. The constitutive material of the soft gripper body is highly flexible Ecoflex. A silver-coated nylon fabric (SCNF) heater reinforced with stainless steel yarn (SSY) covering the external surface of the gripper is designed and manufactured using Autocad 2021 and a laser cutting machine, respectively. The idea is inspired by floating the gripper in warm water to provide smooth heat over a large surface area. The available commercial software Abaqus2021 is used to simulate the mechanical deformation of the gripper, and its results are verified with experimental results. The parameter's effect including the voltage and low boiling liquid volume on achievable force and actuating time are investigated. The relation between the electrical, thermal, and mechanical properties of the presented gripper is discussed in detail.
  • Öge
    Thermally driven 3D seamless textile actuators for soft robotic applications
    (Wiley, 2024) Atalay, Özgür ; Özlem, Kadir ; Gümüş, Çağatay ; Khamis Ahmed, Ibrahim Adel ; Yilmaz, Ayse Feyza ; Çelebi, Mehmet Fatih ; Çetin, Munire Sibel ; Taherkhani, Bahman ; Tuncay Atalay, Aslı ; İnce, Gökhan ; Tekstil Mühendisliği
    Soft wearable robotic devices have emerged as a promising solution for human mobility assistance and rehabilitation, yet current solutions suffer from issues such as bulkiness, high cost, nonscalability, noise, and limited portability. This study introduces a novel approach to soft robotic assistive devices using untethered, soft actuators with seamlessly integrated sensing, heating, and actuation properties through digital machine knitting and low-boiling liquid. The proposed soft actuator operates under a voltage of less than 12.5 V, generating a tip force of up to 50 mN. This actuator achieves a bending motion when filled with 2 mL of low-boiling liquid and supplied with 15 W. The dynamic response of the actuator is examined under consistent parameters, revealing a 60-second inflation time and a subsequent natural cooling period of 30 s at room temperature. Notably, over 12 cycles, the tip force of the actuator exhibits minimal variation, highlighting its durability for prolonged usage. The proposed approach paves the way for overcoming the limitations of existing technologies, particularly in terms of motion assistance and rehabilitation applications, with an emphasis on at-home usage during daily activities.
  • Öge
    Design and scalable fast fabrication of biaxial fabric pouch motors for soft robotic artificial muscle applications
    (Wiley, 2024) Yilmaz, Ayse Feyza ; Ozlem, Kadir ; Celebi, Mehmet Fatih ; Taherkhani, Bahman ; Kalaoglu, Fatma ; Tunçay Atalay, Aslı ; Ince, Gokhan ; Atalay, Ozgur ; orcid.org/0000-0003-1050-0685 ; Tekstil Mühendisliği
    Soft pouch motors, engineered to mimic the natural movements of skeletal muscles, play a crucial role in advancing robotics and exoskeleton development. However, the fabrication techniques often involve multistage processes; they lack soft sensing capabilities and are sensitive to cutting and damage. This work introduces a new textile-based pouch motors with the capacity for biaxial actuation and capacitive sensory functions, achieved through the application of computerized knitting technology using ultrahigh molecular weight polyethylene yarn (Spectra) and conductive silver yarns. This method enables the rapid and scalable mass fabrication of robust pouch motors. The resulting pouch motors exhibit maximum lifting capacity of 10 kg, maximum contraction of 53.3% along the y-axis, and transverse extension of 41.18% along the x-axis at 50 kPa pressure. Finite element analysis closely matches the experimental data. The capacitance signals in relation to contraction motion are well suited for detecting air pressure levels and hold promise for applications requiring robotic control. Notably, it effectively elevates an ankle joint simulator at a 20° angle, highlighting its potential for applications such assisting individuals with foot drop. This study presents a practical demonstration of the soft ankle exosuit designed to provide lifting support for individuals facing this mobility challenge.
  • Öge
    Fabrication and characterization of graphene-loaded recycled poly(ethylene terephthalate) electrospun composite nanofibrous mats with improved thermal conductivity
    (Wiley, 2024) Kalaoglu-Altan, Ozlem Ipek ; Karagüzel Kayaoğlu, Burçak ; Trabzon, Levent ; orcid.org/0000-0002-0394-7027 ; Tekstil Mühendisliği
    In this study, graphene-loaded electrospun recycled poly(ethylene terephthalate) (rPET) nanofibrous mats were produced and characterized morphologically, spectrally, mechanically and thermally. Particularly, the effects of graphene nanoplatelets (GNP) and multilayer graphene (GML) in improving the thermal conductivity and heat dissipation abilities of rPET-based composite nanofibers were investigated. The morphological analyzes pointed out that 1% graphene loading led to smooth nanofibers while 5 and 10% of GNP-loading resulted in coarser nanofibers with rougher surfaces and agglomerations. The differential scanning calorimetry results pointed out that the crystallization temperature increased with increasing graphene content as a result of the pronounced nucleation effect. The thermogravimetric analysis demonstrated an improvement in the thermal stability of the composite nanofibers. The thermal conductivity coefficients increased to 25.422 W/mK-35.842 W/mK for rPET/GNP nanofibers and up to 62.669 W/mK for rPET/GML nanofibers, compared to that of 12.753 W/mK for neat rPET nanofibers which correspond to an increase between 99 and 391%. Heat dissipation capability of the graphene-loaded composite nanofibers was illustrated with infrared thermography data, displaying an increase in the average surface temperature of the nanofibrous mats between 2 and 19°C at 30 s of heating. The results suggest the use of the graphene-loaded rPET composite nanofibers as textile materials for thermoregulating applications. Highlights Recycled poly(ethylene terephthalate)/graphene composite nanofibers are electrospun. Thermal conductivity of graphene-loaded nanofibers increases by up to 391%. Graphene loading in nanofibers leads to faster and more uniform heat dissipation. Mechanical properties of composite nanofibers improve. Value-added recycled polyester materials for thermal management are foreseen.
  • Öge
    Development of needle-punched nonwovens made from waste milkweed and PET fibers
    (Sage Publications, 2024) Tekbaş, Rana Nur ; Karkın, Sevgi ; Cengiz, Fehmi ; Mula, Murat ; Gürarslan, Alper ; https://orcid.org/0009-0006-5430-3316 ; Tekstil Mühendisliği
    Despite the widespread usage and affordability of petroleum-based products, there has been tremendous effort in prioritizing and utilizing biodegradable and environmentally friendly materials. Untraditional natural fibers play a critical role in sustainability studies; however, fibers such as kapok and milkweed are quite expensive compared to other plant-based natural fibers such as cotton and flax. Therefore, it is critical to utilize these untraditional fibers in the most efficient manner that is possible. In this study, short milkweed fiber leftovers collected from the milkweed yarn spinning process were utilized as a filler material inside the needle-punched nonwoven fabrics. For this purpose, short milkweed fibers were blended with hollow polyethylene terephthalate (PET) fibers to develop nonwovens. Three different sets of weight/g fabrics were prepared for both only PET containing and short milkweed/PET blended fibers. Thickness, weight, tensile and bursting strength, thermal comfort, air permeability, and water contact angle measurements were conducted for the samples. Consequently, the thermal resistance of short milkweed/PET blended fabrics with similar weight increased by up to 34% compared to only PET-containing fabrics. Results indicate that valuable short milkweed fibers are suitable for developing nonwoven fabrics with comparable physical properties and superior thermal insulation properties.
  • Öge
    16. Uluslararası Lif ve Polimer Araştırmaları Sempozyumu, 9-10 Mayıs, 2025, İstanbul Teknik Üniversitesi
    (İTÜ Yayınevi, 2025) Tekstil Mühendisliği ; Ulcay, Yusuf ; Demir, Ali ; Toptaş, Ali ; Bidoki, Seyedmansour ; Çavuşoğlu, Aysu
    ULPAS is fundamentally a thematic symposium, a scientific marketplace where research findings in fibers—the fundamental building blocks of textiles—and polymers—the molecules that form them—are shared with the international community.