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11.11.2015 | Original Paper

Effect of addition of microfibrillated cellulose to urea-formaldehyde on selected adhesive characteristics and distribution in particle board

verfasst von: Eike Mahrdt, Stefan Pinkl, Clemens Schmidberger, Hendrikus W. G. van Herwijnen, Stefan Veigel, Wolfgang Gindl-Altmutter

Erschienen in: Cellulose | Ausgabe 1/2016

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Abstract

Several studies demonstrate that the addition of microfibrillated cellulose (MFC) to urea-formaldehyde (UF) wood adhesive improves the mechanical bond strength of wood particle board. In order to elucidate potential underlying mechanisms, the distribution of unmodified UF as well as MFC-modified UF (UF-MFC) in particle board was studied by means of light microscopy. The viscosity and cure characteristic of the adhesive systems were also characterised. UF-MFC showed high viscosity and shear thinning compared to UF. Both chemical and mechanical cure of adhesive were delayed in the presence of MFC. In UF-MFC, the size distribution of adhesive particles shifts towards larger particles compared to UF. More adhesive is directly available for adhesive bonding, and a larger part of the wood is covered with adhesive. This may be the cause for the better mechanical performance of particle board bonded with UF-MFC compared to UF.

Vorheriger Artikel Silver-nanoparticle-impregnated cellulose nanofiber coating for packaging paper

Nächster Artikel Bio polyetherurethane composites with high content of natural ingredients: hydroxylated soybean oil based polyol, bio glycol and microcrystalline cellulose

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Titel: Effect of addition of microfibrillated cellulose to urea-formaldehyde on selected adhesive characteristics and distribution in particle board
verfasst von: Eike Mahrdt
Stefan Pinkl
Clemens Schmidberger
Hendrikus W. G. van Herwijnen
Stefan Veigel
Wolfgang Gindl-Altmutter
Publikationsdatum: 11.11.2015
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 1/2016
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-015-0818-5

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