Počet záznamov: 1
Effect of the thermal ageing of selected characteristics of recycled office paper
Názov Effect of the thermal ageing of selected characteristics of recycled office paper Aut.údaje Jarmila Geffertová, Anton Geffert, Eva Výbohová Autor Geffertová Jarmila TUZDFCHTD - Katedra chémie a chemických technológií Spoluautori Geffert Anton TUZDFCHTD - Katedra chémie a chemických technológií Výbohová Eva TUZDFCHTD - Katedra chémie a chemických technológií Zdroj.dok. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. Roč. 59, č. 1 (2017), s. 59-73. - Zvolen : Technická univerzita vo Zvolene, 2017 Poznámky Lit. Jazyk dok. angličtina Krajina Slovenská republika Heslá recyklovaný papier - recycled paper * modelovanie tepelného starnutia - modelled thermal ageing * jasová reverzibilita - brightness reversion * tržná dĺžka - breaking length * index dotrhávania - tear index * vzduchová priepustnosť - air permeability * napúčanie - swelling * kryštalinita celulózy - crystallinity of cellulose Anotácia The work was focused on monitoring of changes of selected characteristics of recycled office paper occurring during the modelled thermal ageing. The effect of modelled thermal ageing was manifested mainly by the change of optical characteristics when brightness of recycled paper surface decreased by 40%. The coordinate values L*, a* and b* of the color space moved into the black, red and yellow region of the spectrum in achieving of total color differences E* 14.0 during modelled ageing. Thermal ageing due to hornification and shrinkage of fibers significantly affected the value of air permeability (increasing by 31.5%), the value of swelling of paper (decreasing by 37%), the value of tear index (decreasing by 26%), the value of total crystallinity index (decreasing by 26%) and the value of oxidation index (increasing by 24% ). Modelled thermal ageing slightly reduce the pH values of the surface of the paper (by 5.2%), the values of breaking length (by 5.3%) and the values of intensity of the hydrogen bonds (by 2.6%). The biggest changes of monitored characteristics were observed after the first 6-hour interval of modelled thermal ageing. URL https://df.tuzvo.sk/sites/default/files/06-01-17_3_0_0_1_1_0_0_0_0_0_0_0_0.pdf Kategória publikačnej činnosti ADN Báza dát xcla - ČLÁNKY Druh dok. RBX - rozpis článkov z periodík Odkazy PERIODIKÁ-Súborný záznam periodika Zväzky 2017: 1-2 
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Počet záznamov: 1