ITAST (Iranian Textile Association of Science and Technology)Journal of Textiles and Polymers2322-520313120260620Preparation, characterization, and antibacterial properties of PVA/gelatin/ sodium alginate/ silver nanofibersساخت، شناسایی و خواص ضد میکروبی نانوالیاف پلی وینیل الکل/ ژلاتین/ سدیم آلژینات/ نقره24595710.48302/jtp.2026.574633.1347ENSaharAmirisimin BLVFarzamBahramiDepartment of Polymer Engineering, Science and Research Branch, Islamic Azad University, Tehran, IranHossein ALiKhonakdarDepartment of Polymer Science, Faculty of Science, Iran Polymer and Petrochemical Institute, IPPI, Tehran, IranJournal Article20260208Nanofibrous scaffolds based on polyvinyl alcohol (PVA), gelatin (GE), and sodium alginate (SA) were fabricated by electrospinning and loaded with silver nanoparticles (Ag-NPs, 0.4 wt%) to develop antibacterial biomaterials. The optimal scaffold composition consisted of PVA/SA at a volume ratio of 70:30 and was crosslinked with citric acid (5 wt% of the total polymer content). The physicochemical properties of the fabricated scaffolds were characterized using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) analysis, and water contact angle (WCA) measurements. FTIR analysis confirmed intermolecular interactions among the polymer components and successful incorporation of Ag-NPs within the crosslinked polymer network. SEM observations demonstrated the formation of continuous nanofibrous structures, with the optimized PVA/SA/Ag-NP scaffold exhibiting an average fiber diameter of 266 ± 44 nm. EDX mapping verified the presence and homogeneous distribution of Ag-NPs throughout the nanofibrous matrix without noticeable aggregation. The incorporation of hydrophilic polymers resulted in favorable surface wettability, with the optimized scaffold exhibiting a water contact angle of 37.8°. Antibacterial activity evaluated against Staphylococcus aureus and Escherichia coli demonstrated inhibition zone diameters of 3.4 mm. Scaffolds without Ag-NPs showed no detectable antibacterial activity, whereas Ag-NP-loaded scaffolds effectively inhibited bacterial growth. These results demonstrate that Ag-NP-loaded PVA/GE/SA nanofibrous scaffolds possess favorable physicochemical characteristics, surface wettability, and antibacterial activity, suggesting their potential as antibacterial biomaterials for future tissue engineering and regenerative medicine applications. However, further investigations involving mechanical characterization, biological evaluation, and silver-release studies are required to fully establish their biomedical applicability.ITAST (Iranian Textile Association of Science and Technology)Journal of Textiles and Polymers2322-520313120250601Design and Performance Evaluation of Textile-based Microstrip Antenna for Wearable Applications in the ISM Bandطراحی و بررسی عملکرد انتن های میکرواستریپ مبتنی بر منسوج پوشیدنی قابل کاربرد در باند ISM24741810.48302/jtp.2026.566560.1344ENطاهرهخیریاصفهان- دانشگاه صنعتی اصفهان-دانشکده مهندسی نساجی-MohsenShanbeh0000-0003-4826-0998محسنمداح علیاصفهان- دانشکاه صنعتی اصفهان- دانشکده مهندسی برق و کامپیوترJournal Article20251216This study explores the innovative development of electronic textiles, focusing on wearable textile-based antennas designed for advanced applications in healthcare, and fitness. In this study, a novel textile-based ISM band microstrip patch antenna was designed and modeled to work in the 2.4 GHz frequency. The woven fabrics by silver-coated nylon6 multifilament yarns was used to prepare the patch and ground of antenna. A key aspect of the designing process involves calculating the relative permittivity of the denim fabric used as substrate. Determining this value caused the optimization of the antenna’s performance in the 2.4 GHz, ISM band. Moreover, the Simulation Technology using CST software analyzed the suggested antenna performance. Key findings of proposed antenna include a return loss below -10 dB, a gain of 7 dBi, and a Specific Absorption Rate (SAR) of 0.154 W/kg. The SAR results reveal that the antenna complies with safety standard limits. These results demonstrate the antenna’s efficiency, safety, and suitability for future application in wearable technologies.ITAST (Iranian Textile Association of Science and Technology)Journal of Textiles and Polymers2322-520313120250601Experimental and Numerical Investigation of Two-Way Reinforced Concrete Slabs Retrofitted with Braided Glass/Epoxy Composite Grids24756210.48302/jtp.2026.573782.1346ENAliShakersoureh. Department of Textile Engineering, Amirkabir University of Technology, Tehran, IranMajidSafarJohariDepartment of Textile Engineering, Amirkabir University of Technology, Tehran, IranHadiDabiryanDepartment of Textile Engineering, Amirkabir University of Technology, Tehran, Iran0000-0001-5161-2849FarzadHatamiStructural and Earthquake Research Institute, Amirkabir University of Technology, Tehran, IranJournal Article20260203The structural integrity of concrete slabs is a vital concern in civil engineering, necessitating innovative reinforcement and retrofitting techniques to ensure their long-term performance and resilience. This study explores the use of a novel two-dimensional braided glass/epoxy composite grid for retrofitting two-way reinforced-concrete slabs. Through comprehensive numerical analysis and experimental validation, the research aims to assess the effectiveness of this advanced reinforcement technique in enhancing the mechanical properties and stress distribution of retrofitted slabs. The finite-element modeling procedure was validated experimentally using an unretrofitted control slab and a slab retrofitted with a 50×50 mm braided composite grid. A Representative Volume Element (RVE) model is employed to simulate the braided composite grid, providing insights into its advantages and potential challenges. The findings demonstrate significant improvements in load-bearing capacity, energy absorption and overall durability, offering a promising solution for the rehabilitation of aging infrastructure. Within the investigated configurations, braided-grid retrofitting increased the ultimate load by up to 53.62%, with the maximum improvement obtained for the 105 mm-thick C35 slab strengthened using the 100×100 mm grid. This study contributes to the existing body of knowledge by highlighting the practical applications and benefits of incorporating braided composite grid in the retrofitting of concrete slabs.