Penetration Process of Polyurethane Adhesive into the Wood Ultrastructure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F22%3APU147200" target="_blank" >RIV/00216305:26110/22:PU147200 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00027162:_____/22:N0000222 RIV/68407700:21110/22:00361927

Výsledek na webu

<a href="http://dx.doi.org/10.1063/5.0119524" target="_blank" >http://dx.doi.org/10.1063/5.0119524</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0119524" target="_blank" >10.1063/5.0119524</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Penetration Process of Polyurethane Adhesive into the Wood Ultrastructure

Popis výsledku v původním jazyce

The main goal of this paper was to ascertain the exact distribution of one-component polyurethane adhesive in the structure of spruce wood. The used polyurethane (PUR) adhesive meets the requirements set out by EN 301 for bonding structural timber. Fluorochrome Rhodamine B showed sufficient fluorescence when mixed with the PUR adhesive in the amount of 2.5% (diluted in N,N-Dimethylformamide) and subsequent fluorescence microscopy showed the distribution of adhesive in the lumen and in the medullary rays of spruce wood. The adhesive penetration in the transverse direction made its way to the 4th row of wood cells from the bondline. The existence of the adhesive in lumens that were further away was caused by adhesive penetration in medullary rays. Using transmission electron microscopy, the CaCO3 nanoparticles that were deagglomerated in the adhesive using ultrasound were only observed in the lumens of wood cells. The energy dispersive X-ray analysis of the bondline area only detected iodine (dispersed in an amount of 10% and 20% by weight in PUR) in the lumens of the wood cell, and in much higher amounts than in the cell wall. All of the experimental techniques used show that the one-component polyurethane adhesive is not able to penetrate the cell wall structure.

Název v anglickém jazyce

Penetration Process of Polyurethane Adhesive into the Wood Ultrastructure

Popis výsledku anglicky

The main goal of this paper was to ascertain the exact distribution of one-component polyurethane adhesive in the structure of spruce wood. The used polyurethane (PUR) adhesive meets the requirements set out by EN 301 for bonding structural timber. Fluorochrome Rhodamine B showed sufficient fluorescence when mixed with the PUR adhesive in the amount of 2.5% (diluted in N,N-Dimethylformamide) and subsequent fluorescence microscopy showed the distribution of adhesive in the lumen and in the medullary rays of spruce wood. The adhesive penetration in the transverse direction made its way to the 4th row of wood cells from the bondline. The existence of the adhesive in lumens that were further away was caused by adhesive penetration in medullary rays. Using transmission electron microscopy, the CaCO3 nanoparticles that were deagglomerated in the adhesive using ultrasound were only observed in the lumens of wood cells. The energy dispersive X-ray analysis of the bondline area only detected iodine (dispersed in an amount of 10% and 20% by weight in PUR) in the lumens of the wood cell, and in much higher amounts than in the cell wall. All of the experimental techniques used show that the one-component polyurethane adhesive is not able to penetrate the cell wall structure.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20502 - Paper and wood

Projekt

<a href="/cs/project/GA21-20645S" target="_blank" >GA21-20645S: Charakterizace vlastností modifikovaných lepidel na bázi izokyanátu pro speciální lepené aplikace dřevěných prvků</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název statě ve sborníku

AIP Conference Proceedings 2611

ISBN

978-0-7354-4247-4

ISSN

—

e-ISSN

—

Počet stran výsledku

5

Strana od-do

„040008-1 “-„040008-5“

Název nakladatele

AIP Publishing LLC

Místo vydání

Melville (NY), Spojené státy

Místo konání akce

Heraklion

Datum konání akce

4. 9. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—