Density profile and microstructural analysis of densified beech wood (Fagus sylvatica L.) plasticized by microwave treatment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F18%3A43912758" target="_blank" >RIV/62156489:43410/18:43912758 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s00107-017-1173-z" target="_blank" >https://doi.org/10.1007/s00107-017-1173-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00107-017-1173-z" target="_blank" >10.1007/s00107-017-1173-z</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Density profile and microstructural analysis of densified beech wood (Fagus sylvatica L.) plasticized by microwave treatment

Popis výsledku v původním jazyce

This study was carried out in order to determine the efficacy of microwave (MW) plasticization for wood densification purposes. The plasticization process was carried out using a continuous feed laboratory MW at a frequency of 2.45 GHz. European beech (Fagus sylvatica L.) specimens measuring 50 mm x 40 mm x 8 mm were MW treated (plasticized) with an output of 3.5 kW at a conveyor speed of 0.4 m/min. Afterwards, MW plasticized specimens were densified with a ratio of 50%. Microscopic structure changes of densified wood were detected using a scanning electron microscope (SEM) and density profiles were measured using the X-ray densitography. An average density of 677 kg m(-3) and 771 kg m(-3) increased significantly to 951 kg m(-3) for radially densified and to 1194 kg m(-3) for tangentially densified specimens. X-ray densitography results show uniformity of density profiles through specimen thickness, which confirmed the evenly plasticized volume of wood. Microscopic structure observation revealed that the MW plasticization was not accompanied by any fractures, and deformations present in the densified wood were due to viscoelastic buckling of cell walls without crack propagation. Therefore, MW treatment can be considered as an effective method for wood plasticization.

Název v anglickém jazyce

Density profile and microstructural analysis of densified beech wood (Fagus sylvatica L.) plasticized by microwave treatment

Popis výsledku anglicky

This study was carried out in order to determine the efficacy of microwave (MW) plasticization for wood densification purposes. The plasticization process was carried out using a continuous feed laboratory MW at a frequency of 2.45 GHz. European beech (Fagus sylvatica L.) specimens measuring 50 mm x 40 mm x 8 mm were MW treated (plasticized) with an output of 3.5 kW at a conveyor speed of 0.4 m/min. Afterwards, MW plasticized specimens were densified with a ratio of 50%. Microscopic structure changes of densified wood were detected using a scanning electron microscope (SEM) and density profiles were measured using the X-ray densitography. An average density of 677 kg m(-3) and 771 kg m(-3) increased significantly to 951 kg m(-3) for radially densified and to 1194 kg m(-3) for tangentially densified specimens. X-ray densitography results show uniformity of density profiles through specimen thickness, which confirmed the evenly plasticized volume of wood. Microscopic structure observation revealed that the MW plasticization was not accompanied by any fractures, and deformations present in the densified wood were due to viscoelastic buckling of cell walls without crack propagation. Therefore, MW treatment can be considered as an effective method for wood plasticization.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20502 - Paper and wood

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

European Journal of Wood and Wood Products

ISSN

0018-3768

e-ISSN

—

Svazek periodika

76

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

105-111

Kód UT WoS článku

000419447100009

EID výsledku v databázi Scopus

2-s2.0-85015189952