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Mimosa tannin resins for impregnated paper overlays

Mimosa-Tanninharze zur Oberflächenbeschichtung von Papier

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Abstract

The surface quality of plywood coated with resin impregnated papers based on tannin/furfuryl alcohol resins was studied. Several hardeners such as hexamine, paraformaldehyde, formurea and a mixture of formurea and paraformaldehyde were added in small quantities to a mimosa tannin/furfuryl alcohol resin. Papers impregnated with resin based on tannin + furfuryl alcohol + paraformaldehyde, or + formurea were found to yield excellent results in standard water vapour resistance and cross-cut tests. Matrix assisted laser desorption ionization time of flight (MALDI-TOF) mass spectrometry and cross-polarisation-magic angle spinning NMR (CP-MAS 13C NMR) were used to show coreaction of tannin with furfuryl alcohol and even furfuryl alcohol self condensation under alkaline conditions, as well as coreaction of formaldehyde-yielding compounds such as hexamine with both tannin aromatic rings and the aromatic ring of furfuryl alcohol. Some of the more important oligomers formed were identified by MALDI-TOF.

Zusammenfassung

Untersucht wurde die Oberflächenqualität von Sperrholz, das mit harzimprägnierten Papieren auf Basis von Tannin/Furfurylalkohol beschichtet worden war. Verschiedene Härter, wie zum Beispiel Hexamin, Paraformaldehyd, Formurea und eine Mischung aus Formurea und Paraformaldehyd wurden in kleinen Mengen dem Mimosatannin/Furfurylalkoholharz zugegeben. Es wurde gezeigt, dass Papiere, die mit Harzen auf Basis von Tannin + Furfurylalkohol + Paraformaldehyd oder + Formurea imprägniert worden waren, ausgezeichnete Ergebnisse bei der Prüfung des Wasserdampfdurchgangswiderstandes und bei Gitterschnittprüfungen erzielten. Mittels MALDI-TOF (matrixunterstützte Laser-Desorptions-Ionisation in Verbindung mit Flugzeitmassenspektrometrie) und CP-MAS 13C NMR (Kreuzpolarisationsverfahren (NMR) mit schneller Probenrotation um den magischen Winkel) wurde eine Koreaktion von Tannin mit Furfurylalkohol und sogar eine Selbstkondensation von Furfurylalkohol unter alkalischen Bedingungen sowie eine Koreaktion von formaldehydfreisetzenden Verbindungen, wie zum Beispiel Hexamin mit sowohl aromatischen Ringen von Tannin als auch dem aromatischen Ring von Furfurylakohol aufgezeigt. Einige der wichtigeren gebildeten Oligomere wurden mittels MALDI-TOF bestimmt.

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Authors and Affiliations

  1. LERMAB, University of Lorraine, Epinal, France

    Ummi Hani Abdullah, A. Pizzi & X. Zhou

  2. Faculty of Forestry, Universiti Putra Malaysia, Serdang, Selangor, Malaysia

    Ummi Hani Abdullah

  3. South West Forestry University, Kunming, Yunnan, PR, China

    X. Zhou

  4. Deutsches Kunststoff-Institut, Darmstadt, Germany

    K. Rode

  5. IR2 M, University of Haute Alsace, Mulhouse, France

    L. Delmotte

  6. Department of Wood Science and Technology, University of Zabol, Zabol, Iran

    H. R. Mansouri

Authors
  1. Ummi Hani Abdullah
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  2. A. Pizzi
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  3. K. Rode
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  4. L. Delmotte
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  5. X. Zhou
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  6. H. R. Mansouri
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Correspondence to A. Pizzi.

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Abdullah, U.H., Pizzi, A., Rode, K. et al. Mimosa tannin resins for impregnated paper overlays. Eur. J. Wood Prod. 71, 153–162 (2013). https://doi.org/10.1007/s00107-012-0652-5

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  • DOI: https://doi.org/10.1007/s00107-012-0652-5

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