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Thermal properties of wool fabrics treated in an Atmospheric Pressure Post-Discharge plasma equipment
No full textStudy of Methylene Blue adsorption on keratin nanofibrous membranes
No full text: In this work, keratin nanofibrous membranes (mean diameter of about 220nm) were prepared by electrospinning and tested as adsorbents for Methylene Blue through batch adsorption tests. The adsorption capacity of the membranes was evaluated as a function of initial dye concentration, pH, adsorbent dosage, time and temperature. The adsorption capacity increased with increasing the initial dye concentration and pH, while it decreased with increasing the adsorbent dosage and temperature, indicating an exothermic process. The adsorption results indicated that the Langmuir isotherm fitted the experimental data better than the Freundlich and Temkin isotherm models. A mean free energy evaluated through the Dubinin-Radushkevich model of about 16kJmol(-1), indicated a chemisorption process which occurred by ion exchange. The kinetic data were found to fit the pseudo-second-order model better than the pseudo-first-order model. The obtained results suggest that keratin nanofibrous membranes could be promising candidates as dye adsorption filters
The influence of an atmospheric plasma treatment on thermal comfort-related properties of wool fabrics
No full textThe effect of an innovative atmospheric plasma jet treatment on physical and mechanical properties of wool fabrics
No full textThis work concerns the study of some important physical and mechanical properties of a wool fabric treated with a roll-to-roll atmospheric plasma jet equipment. The plasma pilot unit, based on a postdischarge technology, was equipped with an innovative plasma-to-fabric contactor, which promotes a relevant penetration of plasma through the fabric structure and geometrically defines the atmosphere. Wool fabrics were processed at three different velocities (1, 3 and 6 m/min); the other process variables were kept constant. Tensile strength, elongation at break, surface thickness, wettability and air permeability increased after the plasma treatment, while several low-stress mechanical properties, strictly related to the handle, were not modified. SEM analysis was also carried out to better interpret the above macroscopic results
Multifunctional Finishing of Wool Fabrics by Chitosan UV-grafting
No full textChitosan was grafted on wool knitted fabrics, by ultraviolet radiation, in order to confer peculiar properties increasing the textile value and its applications. Results showed first of all the antimicrobial properties conferred by the treatment. Chitosan weight on was optimized while an oxidative pre-treatment of the wool as well as the impregnation method were investigated to improve the effectiveness of treated
fabrics. Moreover treated wool fabrics showed an increased dyeability towards acid dyes and antifelting properties with respect to untreated fabrics, while no effect was revealed toward antipilling properties
Multifunctional finishing of wool fabrics by chitosan UV-grafting: An approach
No full textThe aim of this study was the surface modification of wool fibers to confer a multifunctional finishing
to the fabrics, improving the textile value and its applications without damage of comfort properties.
The attention was focused on an economical and environmental friendly process to obtain an effective
treatment with good durability to washing.
Chitosan in acetic acid solution was applied by padding, and grafted by ultraviolet radiation, through
radical reactions promoted by a photoinitiator. 2% chitosan grafted was enough to confer satisfactory
antimicrobial activity (67% reduction of Escherichia coli) after an oxidative wool pre-treatment and 1 h
impregnation at 50 ◦C. Moreover treated wool fabrics showed a strong dyeability increase toward acid dye.
However the evaluation of the treatment durability to laundering showed different behavior depending
on the nature of the surfactants. Finally, anti-felting properties with respect to untreated fabrics were
revealed, while no effect was shown toward anti-pilling properties
Caratterizzazione fisico-meccanica di tessuti di lana e lana/cashmere sottoposti a lavaggio a secco in CO2
No full textEffet of CO2 dry cleaning on low-stress mechanical properties, air permeability and crease pressing performance of men's suit fabrics
No full text
Oxygen Plasma Treatment to Reduce DyeingTemperature of Wool Fabrics and Characterization of their Physical, Mechanical and Handle Properties
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