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Assessment of the flamgard retardant efficciency during the thermal loading of spruce wood
Názov Assessment of the flamgard retardant efficciency during the thermal loading of spruce wood Aut.údaje Iveta Čabalová ...[et al.] Spoluautori Čabalová Iveta TUZDFCHTD - Katedra chémie a chemických technológií Zachar Martin TUZDFPO - Katedra protipožiarnej ochrany Bélik Michal Majerská Kristína Zdroj.dok. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. Vol. 62, no. 2 (2020), s. 75-87. - Zvolen : Technická univerzita vo Zvolene, 2020 Poznámky Lit. Jazyk dok. angličtina Krajina Slovenská republika Systematika 674.032.475.5 630*843 630*812.14 547.458.81 547.458.87 630*864.4 Heslá smrekové drevo - spruce wood * retardéry horenia - retarders of burning * termická degradácia dreva - thermal degradation of wood * celulóza - cellulose * hemicelulózy - hemicelluloses * lignín - lignin Anotácia The aim of the paper was to determine the resistance of spruce wood (Picea abiesL.) treated with a flame retardant Flamgard after exposure of its surface to radiant heat. Treated samples were thermally loaded for 30 and 45 minutes and untreated sample were loaded for 30minutes. The changes in the chemical composition of wood (extractives, lignin, cellulose and hemicelluloses content) in two layers which were removed below the charred layer (layer 1-thickness up to 20 mm and layer 2-thickness from 20 to 40 mm) and thickness of the charred layer were evaluated. During the thermal loading of a control sample, the temperature of 300°C in time of 920 seconds was observed.The average thickness of charred layer was 15.41 mm.The limit temperature of 300°C was not reached by both treated samples loaded for 30 and 45 minutes. The average thickness of charred layer of the treated samples was 10.03 mm (30 min.) and 20.04 mm(45 min.).The major chemical changes were recorded in the wood sample untreated with a retardant, mainly in the layer 1 (decrease inlign in by 12.26% and holocellulose content by 16.87%). The experiment showed that the retardant used reduced considerably the degradation of material in terms of changes in its chemical composition. There were no big changes of both lignin and holocellulose content during the thermal loading of the treated samples (decrease inlignin from 1.89 to 6.46% and holocellulose amount from 0 to 4.14%). The experiments also confirmed that the least thermally stable components of wood, namely hemicelluloses, were degraded to the greatest extent, most in the layer 1 of the control sample (decrease in20.25%). URL https://df.tuzvo.sk/sites/default/files/07-02-20_0.pdf Kategória publikačnej činnosti ADN Báza dát xcla - ČLÁNKY Druh dok. RBX - rozpis článkov z periodík Odkazy PERIODIKÁ-Súborný záznam periodika Zväzky 2020: 1-2 
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Počet záznamov: 1