Počet záznamov: 1
Assessment of the chemical change in heat treated pine wood by near infrared spectroscopy
SYS 0100717 LBL 00000naa^^22^^^^^^^^450 005 20190402110239.5 017 70
$a 10.17423/afx.2019.61.1.03 $2 DOI 100 $a 20190402a m y0sloy0103 ba 101 0-
$a eng 102 $a SK 200 1-
$a Assessment of the chemical change in heat treated pine wood by near infrared spectroscopy $f Zuzana Vidholdová, Anna Sandak, Jakub Sandak 215 $c Obr., tab. 320 $a Lit. 330 $a Fourier-transform near-infrared spectroscopy (FT-NIR) was used as none-destructive method to determinate changes in the chemical structure of heat-treated wood. For this purpose, pine sapwood (Pinus sylvestrisL.) was treated at different temperatures (from 100 °C to 240°C) and for three durations(1, 3 or 5 hours). The effects of chemical changes on the FT-NIR spectra are linked to absorbance changes of functional groups (–OH, –CH, –CO and –CH2) of lignin, hemicelluloses and cellulose. Gradual degradation of amorphous portion of cellulose was caused by high temperature, while crystalline and semi-crystalline portions of cellulose seem to be less affected by the thermal treatment. The effect of various intensities of heat treatment on chemical changesof wood polymers varied depending on temperature and duration. Presentation of spectra in the form of the xylograms shows clear tendency of degradation kinetic. Evaluation of thermal stability of selected wood component and/or comparison of the influence of modification process parameters can be carried out. 463 -1
$1 001 sldk_un_cat*0100704 $1 011 $a 1336-3824 $1 200 1 $a Acta Facultatis Xylologiae Zvolen $e vedecký časopis Drevárskej fakulty $v Vol. 61, no. 1 (2019), s. 31-42 $1 210 $a Zvolen $c Technická univerzita vo Zvolene $d 2019 610 1-
$9 sldk_un_auth*h005104 $a borovicové drevo $X pine wood 610 1-
$9 sldk_un_auth*h030732 $a tepelné spracovanie dreva $X thermal treatment of wood 610 1-
$9 sldk_un_auth*h017405 $a spektroskopia FT-NIR $X FT-NIR spectroscopy 610 1-
$9 sldk_un_auth*0051973 $a xylogram $X xylogram 675 $a 630*81 $v 1. stred. $z slo 675 $a 674.032.475.4 $v 2. stred $z slo 675 $a 630*824.87 $v 1. stred. $z slo 700 -1
$3 sldk_un_auth*p0017466 $a Vidholdová $b Zuzana $f 1975- $p TUZDFDT $4 070 $T Katedra drevárskych technológií 701 -1
$3 sldk_un_auth*0051965 $a Sandak $b Anna $4 070 701 -1
$3 sldk_un_auth*0006762 $a Sandak $b Jakub $4 070 801 -0
$a SK $b ZV001 $c 20190402 $g AACR2 856 4-
$u https://df.tuzvo.sk/sites/default/files/03-01-19.pdf
Počet záznamov: 1