Comparative study on the properties of cellulose nanofiber (CNF) and cellulose nanocrystals (CNC) reinforced 1C-PUR adhesive bonded wooden joints

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F22%3A43921718" target="_blank" >RIV/62156489:43410/22:43921718 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41320/22:92942

Výsledek na webu

<a href="https://doi.org/10.1016/j.conbuildmat.2022.128262" target="_blank" >https://doi.org/10.1016/j.conbuildmat.2022.128262</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.conbuildmat.2022.128262" target="_blank" >10.1016/j.conbuildmat.2022.128262</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparative study on the properties of cellulose nanofiber (CNF) and cellulose nanocrystals (CNC) reinforced 1C-PUR adhesive bonded wooden joints

Popis výsledku v původním jazyce

Polyurethane (PUR) adhesive was reinforced with cellulose nanocrystal (CNC) and acetylated cellulose nanofiber (CNF) to enhance its bonding performance. The reinforced adhesive was used to prepare lap joints using spruce and beech wood. Cyclic moisture exposure was carried out to assess the effect of moisture variation on the bond performance. Elastic modulus and shear strength were determined to ascertain the bonding behavior of adhesives. Reinforcement of PUR with nanocellulose significantly improved (33%) the elastic modulus in spruce wood while the improvement was only marginal (12%) in beech wood. Cyclic moisture exposure reduced the elastic modulus of CNC reinforced PUR in both the species, while the value increased by 5% for 0.5% CNF reinforced PUR joints. Reinforcement of PUR with nanocellulose significantly improved the shear strength. The improvent was more in spruce (45%) as compared to beech wood (35%). Moisture exposure caused a significant improvement in the shear strength of pure and reinforced PUR bonded joints, however, the values decreased for spruce wood except for 0.5% CNF loading where it was marginally higher. SEM micrographs revealed improved bond line with nanocellulose reinforcement in both the wood species. The glass transition temperature of PUR adhesive slightly decreased due nanocellulose reinforcement.

Název v anglickém jazyce

Comparative study on the properties of cellulose nanofiber (CNF) and cellulose nanocrystals (CNC) reinforced 1C-PUR adhesive bonded wooden joints

Popis výsledku anglicky

Polyurethane (PUR) adhesive was reinforced with cellulose nanocrystal (CNC) and acetylated cellulose nanofiber (CNF) to enhance its bonding performance. The reinforced adhesive was used to prepare lap joints using spruce and beech wood. Cyclic moisture exposure was carried out to assess the effect of moisture variation on the bond performance. Elastic modulus and shear strength were determined to ascertain the bonding behavior of adhesives. Reinforcement of PUR with nanocellulose significantly improved (33%) the elastic modulus in spruce wood while the improvement was only marginal (12%) in beech wood. Cyclic moisture exposure reduced the elastic modulus of CNC reinforced PUR in both the species, while the value increased by 5% for 0.5% CNF reinforced PUR joints. Reinforcement of PUR with nanocellulose significantly improved the shear strength. The improvent was more in spruce (45%) as compared to beech wood (35%). Moisture exposure caused a significant improvement in the shear strength of pure and reinforced PUR bonded joints, however, the values decreased for spruce wood except for 0.5% CNF loading where it was marginally higher. SEM micrographs revealed improved bond line with nanocellulose reinforcement in both the wood species. The glass transition temperature of PUR adhesive slightly decreased due nanocellulose reinforcement.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20502 - Paper and wood

Projekt

<a href="/cs/project/EF16_019%2F0000803" target="_blank" >EF16_019/0000803: Excelentní Výzkum jako podpora Adaptace lesnictví a dřevařství na globální změnu a 4. průmyslovou revoluci</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Construction and Building Materials

ISSN

0950-0618

e-ISSN

1879-0526

Svazek periodika

344

Číslo periodika v rámci svazku

15 August

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

128262

Kód UT WoS článku

000861321000004

EID výsledku v databázi Scopus

2-s2.0-85132961321