Počet záznamov: 1
The color of beech wood modified in air, paraffin or polyethylene glycol, and after following weathering in xenotest
SYS 0112500 LBL 00000naa^^22^^^^^^^^450 005 20211104092958.2 017 70
$a 10.17423/afx.2021.63.2.05 $2 DOI 100 $a 20211104a m y0sloy0103 ba 101 0-
$a eng 102 $a SK 200 1-
$a The color of beech wood modified in air, paraffin or polyethylene glycol, and after following weathering in xenotest $f Miroslav Repák, Ladislav Reinprecht 215 $c Graf., obr., tab. 320 $a Lit. 330 $a The thermal treatment of European beech (Fagus sylvatica L.) wood specimens was performed in three different media – air, paraffin or polyethylene glycol 6000 (PEG 6000) – during 1, 2, 3 or 4 hours, applying either only heating at a temperature of 100 °C or modification process at the temperatures of 190 °C and 210 °C. Following, the thermally treated specimens were artificially weathered in Xenotest in an accordance with the modified EN 927-6 (2018) for 6-weeks. The color parameters L*, a*, and b* of beech specimens were measured in their original state, after thermal treatment, and finally after weathering. The total color difference DE*ab values of the air-thermally, paraffin-thermally and PEG- thermally modified beech specimens ranged from 23.6 (for air-thermal mode 190 °C/1h) up to 55.8 (for PEG-thermal mode 210 °C/4h), evidently in connection with their apparent darkening with DL* from – 22.9 up to – 54.2. Due to the following exposure of beech specimens in Xenotest, the highest total color difference DE*ab from 20.1 to 36.4 had the PEG-thermally modified ones, which evidently lightened with DL* from 18.6 to 32.6. At weathering the PEG-thermally modified beech wood specimens were the best resistant against creation of cracks in surfaces, in contrast to the air-thermally modified specimens. 463 -1
$1 001 sldk_un_cat*0112179 $1 011 $a 1336-3824 $1 200 1 $a Acta Facultatis Xylologiae Zvolen $e vedecký časopis Drevárskej fakulty $v Vol. 63, no. 2 (2021), s. 55-71 $1 210 $a Zvolen $c Technická univerzita vo Zvolene $d 2021 610 1-
$9 sldk_un_auth*h001468 $a bukové drevo $X beech wood 610 1-
$9 sldk_un_auth*h015030 $a parafín $X paraffine 610 1-
$9 sldk_un_auth*h015558 $a polyetylénglykoly $X polyetylene glycols 610 1-
$9 sldk_un_auth*0050136 $a termická modifikácia $X thermal modification 610 1-
$9 sldk_un_auth*h014696 $a odolnosť dreva voči klimatickým činiteľom $X weathering durability 610 1-
$9 sldk_un_auth*h013461 $a farba dreva $X colour of wood 675 $a 674.031.632.2 $v 2. stred. $z slo 675 $a 630*81 $v 1. stred. $z slo 675 $a 665.7.033.22 $v 2. stred 700 -1
$3 sldk_un_auth*0039706 $a Repák $b Miroslav $f 1993- $p TUZDFDT $4 070 $T Katedra drevárskych technológií 701 -1
$3 sldk_un_auth*p0028092 $a Reinprecht $b Ladislav $f 1953- $p TUZDFDT $4 070 $T Katedra drevárskych technológií 801 -0
$a SK $b ZV001 $c 20211104 $g AACR2 856 4-
$u https://df.tuzvo.sk/sites/default/files/05-02-21_0_0_0.pdf
Počet záznamov: 1