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Vplyv modifikačných činidiel na degradáciu celulózy pri urýchlenom starnutí papiera
SYS 0070194 LBL 00000naa^^22^^^^^^^^450 005 20190402093504.4 100 $a 20131011a m y0sloc0103 ba 101 $a slo 102 $a SK 200 1-
$a Vplyv modifikačných činidiel na degradáciu celulózy pri urýchlenom starnutí papiera $d Influence of modificatory reagents on cellulose degradation at accelerated ageing $f Anna Briškárová, František Kačík 215 $c Graf., tab. 320 $a Lit. 330 $a Preservation of cultural heritage is an actual global problem. A great deal of culture heritage is formatted by information stored on lignocellulosic carriers. In present, treatment of these materials is realized by deacidification to eliminate main degradation mechanism - acid hydrolysis. Several new processes have been developed for complex protection of lignocellulosics to influence of various degradation mechanisms simultaneously. In this work three series of modified and one series of control (unmodified) samples were undergone to accelerated ageing at 98 °C for 0, 3, 5, 10 and 15 days. We compared the efficiency of multifunction modification system to effect of particular conservation substances (deacidification agent - magnesium ethoxide and titanium ethoxide (METE) and an antioxidant - 4-amino-2,2,6,6-tetrametylpiperidine (DAO3)) on samples of pure cellulose - Whatman paper. Degree of polymerization (DP) and molecular weight distribution (MWD) of cellulose samples were determined by gel permeation chromatography (GPC) as their cellulose tricarbanilates (CTC). DP of cellulose is linear function of time: DP = A0 + K·DAY (R2 = 0.82−0.99) in the investigated interval of accelerated ageing. Degradation rate of DP decreases 1.5-fold with application of DAO3; 5-fold with METE+DAO3 and 6-fold with METE as compared to unmodified sample. 330 $a Cieľom práce bolo sledovanie vplyvu rôznych modifikačných sústav (deacidifikačná látka, antioxidant, kombinácia deacidifikačnej aj antioxidačnej látka) na spomalenie degradácie celulózy pri urýchlenom starnutí papiera. 463 -1
$1 001 sldk_un_cat*0068712 $1 011 $a 1336-3824 $1 200 1 $a Acta facultatis xylologiae Zvolen $e vedecký časopis Drevárskej fakulty $v Roč. 55, č. 2 (2013), s. 87-95 610 $9 sldk_un_auth*h028035 $a urýchlené starnutie papiera $X intensified paper ageing 610 $9 sldk_un_auth*h008758 $a celulóza $X cellulose 610 $9 sldk_un_auth*h014306 $a degradácia celulózy $X cellulose biodegradation 610 $9 sldk_un_auth*0032431 $a modifikačné činidlá $X modificatory reagents 610 $9 sldk_un_auth*h029918 $a gélová permeačná chromatografia $X gel permeation chromatography 675 $a 676.019.002.254 $v 1. stred. $z slo 675 $a 547.458.81 $v 1. stred. $z slo 675 $a 676.019 $v 1.stred $z slo 675 $a 543.544.153 $v 1. stred. $z slo 675 $a 676.019.002.25 $v 1.stred $z slo 700 -1
$3 sldk_un_auth*0027084 $a Briškárová $b Anna $f 1985- $p TUZDFCHTD $4 070 $T Katedra chémie a chemických technológií 701 -1
$3 sldk_un_auth*p0015985 $a Kačík $b František $f 1958- $p TUZDFCHTD $4 070 $T Katedra chémie a chemických technológií 801 -0
$a SK $b ZV001 $c 20131011 $g AACR2
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