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Silica Aerogel Application to Polyester Fabric for Outdoor Clothing
Pelin Altay,Raziye Atakan,Gülay Özcan 한국섬유공학회 2021 Fibers and polymers Vol.22 No.4
Most producers want to have a cheap, one-step system that will successfully apply multi-finishing operationswithout affecting any of the desired textile properties. Silica aerogel, used for isolation purposes in different areas such asconstruction, has been used in textile finishing in this study. 100 % polyester fabrics, which are widely used in outerwear,were impregnated with silica aerogel paste and binder at lower temperature and time than that applied for conventionalcoating method, providing decreased energy consumption. The samples were tested for wettability, soil release andhydrophobicity both before and after repeated laundering. Burst strength tests were also performed to investigate strengthproperties of the fabrics. The presence of silica groups on the treated fabrics was confirmed by FTIR spectra and thermalcharacteristics of the samples were evaluated by using differential scanning calorimeter (DSC). The results showed thataerogel impregnated fabrics provide superhydrophobic properties with a contact angle of around 170 o and improved soilrelease properties even at very low add-ons. It was also found that the silica aerogel treatment has no adverse effect on thefabric appearance or strength properties.
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Nilüfer Yıldız Varan,Pelin Altay 한국섬유공학회 2022 Fibers and polymers Vol.23 No.4
A novel method to enhance antibacterial activity, thermophysiological comfort properties of highly elastanepolyamide 66 fabrics by calcium chloride pad-dry-cure method was proposed. For this purpose, three different calciumchloride solutions were prepared and applied by pad-dry-cure method to the polyamide tricot (locknit) warp knitted fabrics. The effects of this method on polyamide fabrics were investigated by antibacterial activity, thermophysiological properties,physical performance tests and characterization analyses, namely, SEM, EDX and FTIR-ATR. Results indicate that calciumchloride agent procedure significantly affected antibacterial activity and thermal comfort properties. The calcium chlorideagent procedure was found to be favorable for polyamide/elastane fabrics since it provided antibacterial activity andthermophysiological effect under mild conditions with good stiffness, handle and whiteness properties by means of calciumchloride ionic bonds onto polyamide/elastane fabrics. Most notably, calcium chloride treated fabrics were evaluated as goodantibacterial, extremely breathable and comfortable at a higher level of activity.
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Vahid Shakeri Siavashani,Nevin Cigdem Gursoy,Majid Montazer,Pelin Altay 한국섬유공학회 2022 Fibers and polymers Vol.23 No.10
In this research, multifunctional properties of cotton/lycra textiles coated with ternary composites of polypyrrole(PPy), silver nanoparticles (SNPs), and poly(3,4-ethylene dioxythiophene) poly(styrene sulfonate) (PEDOT:PSS) (P-S-Pcomposites) is reported. FTIR spectroscopy, XRD and XPS surface analysis proved successful in situ polymerization of theP-S and also attaching the PEDOT:PSS onto the cotton/lycra surface. Morphological observations showed that coating thecotton/lycra textile with the P-S-P composites made a more compact layer on the surface. Surface topology showed that thePEDOT:PSS was able to fill the gaps between the P-S composites, thus making the surface smoother. Wettabilityinvestigations showed that considering the Wenzel theory, by increasing the density of the P-S coating, the hydrophobicity ofthe fabric increased but according to the smoother surface of the fibers after coating with PEDOT:PSS, the hydrophobicitywas slightly reduced. Due to filling the gaps on the surface and more compact layer, the P-S-P coated textile acted as anexcellent electromagnetic interference shield (SE≈40 dB) showed better electromagnetic absorption, reflection, and shieldingeffectiveness (SE) of about 40 %, 103 %, 115 % respectively than the P-S coated textile while the transmission decreased to35 %. Moreover, the treated textile had wonderful antimicrobial activity against both Gram-positive and negative bacteriaand also fungi. According to flexibility, high conductivity, and multifunctional property, the cotton/lycra knitted textilescoated with P-S-P could be very reliable to be used for developing smart textiles which are desirable for protective andmedical applications.
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