Effect of chemical and thermal modification, and material replacement on strand board properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F20%3A43917704" target="_blank" >RIV/62156489:43410/20:43917704 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s00107-020-01527-8" target="_blank" >https://doi.org/10.1007/s00107-020-01527-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00107-020-01527-8" target="_blank" >10.1007/s00107-020-01527-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of chemical and thermal modification, and material replacement on strand board properties

Popis výsledku v původním jazyce

The purpose of this paper was to analyze the effects of various OSB-strand modifications on physical and mechanical properties of strand board. Norway spruce (Picea abies L. Karst) strands were acetylated using acetic anhydride or thermally modified at 180 oC using atmospheric pressure and superheated steam environment. Strand boards made of acetylated strands (Acet), thermally modified strands (TM) and thermally modified strands used only at surface layers (TMSL) were produced. Furthermore, strand boards with 20% (Cork20%) and 40% (Cork40%) cork particles were manufactured. Wood-water relations, i.e., equilibrium moisture content (EMC), water absorption (WA), thickness swelling (TS), as well as mechanical properties, i.e., bending strength and internal bonding, were tested and compared to untreated reference strand board. The EMC for TMSL was no different than the reference boards, however, the other boards had a statistically significant decrease in EMC. Acetylated strand board and boards with cork particles had a significant increase in water resistance. The mechanical properties decreased for TM and Cork40%, but no difference was shown for Cork20%. Acetylation increased internal bond strength. The results provide a comparison between different modifications of strand boards and show a new possibility of reducing the water effects on OSB with cork particles.

Název v anglickém jazyce

Effect of chemical and thermal modification, and material replacement on strand board properties

Popis výsledku anglicky

The purpose of this paper was to analyze the effects of various OSB-strand modifications on physical and mechanical properties of strand board. Norway spruce (Picea abies L. Karst) strands were acetylated using acetic anhydride or thermally modified at 180 oC using atmospheric pressure and superheated steam environment. Strand boards made of acetylated strands (Acet), thermally modified strands (TM) and thermally modified strands used only at surface layers (TMSL) were produced. Furthermore, strand boards with 20% (Cork20%) and 40% (Cork40%) cork particles were manufactured. Wood-water relations, i.e., equilibrium moisture content (EMC), water absorption (WA), thickness swelling (TS), as well as mechanical properties, i.e., bending strength and internal bonding, were tested and compared to untreated reference strand board. The EMC for TMSL was no different than the reference boards, however, the other boards had a statistically significant decrease in EMC. Acetylated strand board and boards with cork particles had a significant increase in water resistance. The mechanical properties decreased for TM and Cork40%, but no difference was shown for Cork20%. Acetylation increased internal bond strength. The results provide a comparison between different modifications of strand boards and show a new possibility of reducing the water effects on OSB with cork particles.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20502 - Paper and wood

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

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

78

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

565-575

Kód UT WoS článku

000523088500001

EID výsledku v databázi Scopus

2-s2.0-85083197903