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Abstract: Al(OH)3 nanoparticles (ATH NPs) and phosphorylated cellulose nanofibrils (PCNFs) were used as user-friendly and comfortable coating components on flame-retardant fabric to improve its thermophysiological comfort and high-intensive heat protection properties. The effect of the PCNF imprinting and its attachment after the post-printing of a hydrophobic polyacrylate (AP) on the same (back side) or the other (front) side of the fabric, with and without the addition of ATH NPs, was considered, to maintain the front side (facing the wearer) as hydrophilic while keeping the back side (facing the outside) hydrophobic. The amount of coatings applied and their patterning were studied, varied with the ATH NPs’ concentration (1.7, 3.3 and 6.7 wt%) and screen mesh size used (60 and 135), based on the coating’ mass, fabric’s air permeability, thickness and microstructure. The reduced moisture build-up (55%), increased the water vapour (13%) and heat (12%) transfer from the skin, were assessed by applying PCNF under the AP, being more pronounced in the case of using a 135 mesh-sized screen, given the smaller, more densely distributed, thinner and imprinted pattern coatings. These effects were further improved by the addition of nanoporous ATH NPs, which allowed more homogeneous spreading of the moisture and its faster transport. Such a treatment also shifted the fabric’s degradation temperature towards higher values (up to 15°C), retained up to 30% of high-heat flux (21 kW/m2), prolonged the time to ignition by 11 s and reduced the total heat released by up to 60%, thereby providing better protection when exposed to the heat, due to the presence of the phosphorous (PCNF) promoted generation of an Al2O3 char acting as a barrier layer, while also reducing the production of heat and generation of smoke by 75%.
Keywords: tekstilna tehnologija, ognjevaren tekstil, Al(OH)3 nanodelci, celulozni nanofibrili, tiskanje tekstilij, optične lastnosti, termofiziološko udobje, toplotna zaščita, flame-retardant textile, Al(OH)3 nanoparticles, phosphorylated cellulose nanofibrils, screen-printing, thermophysiological comfort, heat protection
Published in DKUM: 12.07.2023; Views: 455; Downloads: 14
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Abstract: Uporaba sintetičnih gostil daje odlično globino barvnih tonov v reaktivnem tisku in hkrati predstavlja tudi zanimivo alternativo alginatom, ki se uporabljajo danes. Za uporabo teh sistemov je zelo pomembno dobiti natančne informacije o občutljivosti na strižno hitrost in na elektrolite. Viskozne in viskoelastične lastnosti tiskarskih barvnih gošč iz alginatnih in sintetičnih gostil ter njihovih mešanic smo raziskovali in primerjali z rezultati tiska. Ugotovili smo, da občutljivost sintetičnih gostil na elektrolite lahko uravnavamo z dodatkom alginata. Mešanice gostil kažejo lastnosti med sintetičnimi in alginatnimi gostili in predstavljajo zanimivo alternativo.
Keywords: tekstilna industrija, tiskanje tekstilij, reaktivna barvila, alternativna gostila, alginat, poliakrilat, lastnosti gostil, kakovost odtisov, reologija, barvna metrika
Published in DKUM: 31.08.2017; Views: 1203; Downloads: 142
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Abstract: Tiskanje je najbolj mnogostranski in pomemben tehnološki postopek, ki vpeljuje barve in dizajn na površino tekstilij. Naravna gostila imajo pri tiskanju tekstilij pomembno vlogo, saj so popolnoma biološko razgradljiva. Celulozna vlakna so najbolj pogosto tiskani substrati in reaktivna barvila so najbolj uporabljena barvila. Mnoge kemikalije, ki jih pri plemenitenju uporabljamo so še zmeraj toksične in/ali ekološko nesprejemljive, zato se jim poskušamo izogniti ali nadomestiti s sprejemljivimi. Reakcije, ki jih katalizirajo encimi, potekajo pri milejših pogojih (pH in temperaturi) hitreje in specifično, zaradi česar ne poškodujejo substrata in ne delujejo na druge komponente v sistemu. Z uporabo celulaznih encimov v postopku tiskanja celuloznih substratov z naravnimi gostili bi tako lahko z (delno ali popolno) razgradnjo celuloznega substrata dobili ekološko prijazen postopek tiskanja, hkrati pa tudi zanimive dezene, predvsem, če bi postopek encimskega tiskanja kombinirali s predhodnim ali naknadnim barvanjem substrata. Tako bi dobili možnost za kombinirano, strukturno in barvno vzorčenje materiala.
Keywords: encimi, tiskarska gostila, tiskarske gošče, tiskanje tekstilij, celuloza
Published in DKUM: 11.10.2010; Views: 2825; Downloads: 149
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Keywords: tekstilna tehnologija, tiskanje tekstilij, digitalni tisk, brizgalni tiskalnik, kisla barvila, poliamid, elastan, barvna metrika
Published in DKUM: 26.07.2007; Views: 3351; Downloads: 0

Keywords: tiskanje tekstilij, pigmenti, naravno olje, emulzijsko gostilo, bombaž, kakovost tiska
Published in DKUM: 26.07.2007; Views: 2854; Downloads: 0