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Synergistic effect of screen-printed Al(OH)[sub]3 nanoparticles and phosphorylated cellulose nanofibrils on the thermophysiological comfort and high-intensive heat protection properties of flame-retardant fabric
Tjaša Kolar, Jelka Geršak, Nataša Knez, Vanja Kokol, 2022, izvirni znanstveni članek

Opis: 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%.
Ključne besede: 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
Objavljeno v DKUM: 12.07.2023; Ogledov: 309; Prenosov: 8
.pdf Celotno besedilo (2,91 MB)
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Priprava in karakterizacija elektroprevodnih tekstilnih nanosov
Damijana Zlatolas, 2016, magistrsko delo

Opis: Tekstilni materiali, naravni (celuloza) ali sintetični (polimerni materiali) so večinoma električno neprevodni in ne omogočajo prostega pretoka električnega naboja po svoji strukturi. Posledično to povzroča kopičenje elektrostatičnega naboja na površini tekstilnega materiala, ki nastaja zaradi trenja med neprevodnimi vlakni. Statična elektrika in tveganje elektrostatičnega preboja, predstavlja problem v tekstilnih procesih in končnih aplikacijah. Cilj raziskovalne naloge je pripraviti električno prevodne sol-gel nanose na osnovi tetraetoksisilana (TEOS) in metiltrietoksisilana (Me-TREOS) a) s prevodnim tetratiafulvalenom (TTF) in b) dopirane s kovinskimi prahi: aluminij (Al), baker (Cu) in železo (Fe). S prevodnimi sol-gel nanosi se bodo modificirala naravna in sintetična tekstilna vlakna. Sol-gel nanose in modificirana vlakna bodo okarakterizirana (SEM mikroskopija, meritve električne prevodnosti in električne upornosti). Drugi del cilja raziskovalne naloge je pripraviti nanokompozite na osnovi poliamida (PA6), ki bo dopira s prevodnimi nanomateriali polianilina PANI, Ag/PANI, s prevodnim titanovim dioksidom (TiO2) in Mn acetatom ter s kombinacijami PANI, TiO2 in Mn acetat. Površinsko bodo obdelana sintetična vlakna s prevodnim nanomaterialom TiO2/Mn acetat. PA6 nanokompozite in prevodne nanomateriale materiale ter modificirana vlakna bodo okarakterizirana (FTIR, TEM, DSC, BET, meritve električne upornosti).
Ključne besede: sol-gel tehnologija, elektro prevodni nanosi, PA6 nanokompoziti, prevodni nanomateriali, tekstilna vlakna
Objavljeno v DKUM: 17.10.2016; Ogledov: 2350; Prenosov: 141
.pdf Celotno besedilo (4,57 MB)

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Vpliv smeri vitja sukanca na fizikalno mehanske lastnosti tkanin za vrhnja oblačila : diplomsko delo
Zoran Grobelšek, 1995, diplomsko delo

Ključne besede: tekstilna tehnologija
Objavljeno v DKUM: 26.07.2007; Ogledov: 2340; Prenosov: 0

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