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The effect of acetylated particle distribution and type of resin on physical and mechanical properties of poplar particleboard

Einfluss der Verteilung acetylierter Späne im Plattenquerschnitt und der Harzart auf die physikalischen und mechanischen Eigenschaften von Pappelspanplatten

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Abstract

This paper presents the results of a study on using acetylated particles for particleboard production. A three-layer board with distributed acetylated particles on the surface layers and a single-layer board with a uniform distribution of acetylated particles were fabricated. Three levels of acetylation of  0, 8.4 and 17.3% weight percentage gain (WPG), i.e., zero, medium and high levels of acetylation, were applied. The boards were fabricated with 4 wt% methylene diphenyl diisocyanate (MDI) and 10 wt% urea formaldehyde (UF) adhesive. The results indicated that the mechanical properties of the boards were negatively affected by acetylated particles. Overall, MDI-bonded particleboards gave superior mechanical performance, water resistance, and thickness swell to UF-bonded particleboards. The strength of UF-bonded boards decreased much more than that of MDI-bonded boards as acetylation level increased. The MDI-bonded single-layer boards made using medium-level acetylation were recognized to have suitable mechanical properties, and the MDI-bonded three-layer boards made from high level acetylation showed suitable dimensional stability.

Zusammenfassung

Vorgestellt werden die Ergebnisse einer Studie über die Verwendung von acetylierten Spänen zur Herstellung von Spanplatten. Es wurden eine dreischichtige Platte mit acetylierten Spänen in den Deckschichten und eine einschichtige Platte mit 50% acetylierten Spänen hergestellt. Dabei wurden drei Acetylierungsgrade angewandt  0, 8,4 und 17,3% Gewichtszunahme (WPG), d. h. null, mittlerer und hoher Grad an Acetylierung. Die Platten wurden mit 4 Gew.% Methylendiphenyldiisocyanat (MDI) und 10 Gew.% Harnstoff-Formaldehydharz (UF) hergestellt. Die Ergebnisse zeigten, dass die acetylierten Späne einen negativen Einfluss auf die mechanischen Eigenschaften der Platten hatten. Im Allgemeinen zeigten die MDI-verklebten Spanplatten bessere mechanische Eigenschaften, Wasserresistenz und Dickenquellung als die UF-verklebten Spanplatten. Mit zunehmendem Acetylierungsgrad nahm die Festigkeit der UF-verklebten Platten stärker ab als die der MDI-verklebten Platten. Die MDI-verklebten einschichtigen Platten mit mittlerem Acetylierungsgrad wiesen brauchbare mechanische Eigenschaften auf und die MDI-verklebten dreischichtigen Platten mit hohem Acetylierungsgrad ergaben eine brauchbare Dimensionsstabilität.

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Acknowledgements

This research was supported by the Center of Excellence of Applied Management of Fast Growing Wood. The authors would like to thank Dr.  M.  Azadfallah for helping to correct this paper.

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Authors and Affiliations

  1. Wood Science and Technology Department, Natural Resources Faculty, University of Tehran, Chamran Boulevard, P.O. Box 4314, 3158777878, Karaj, Iran

    Hamideh Abdolzadeh, Kazem Doosthoseini, Ali Naghi Karimi & Ali Akbar Enayati

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  1. Hamideh Abdolzadeh
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  2. Kazem Doosthoseini
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  3. Ali Naghi Karimi
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  4. Ali Akbar Enayati
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Correspondence to Hamideh Abdolzadeh.

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Additional corresponding author e-mail address: h_abdolzadeh@ut.ac.ir

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Abdolzadeh, H., Doosthoseini, K., Karimi, A.N. et al. The effect of acetylated particle distribution and type of resin on physical and mechanical properties of poplar particleboard. Eur. J. Wood Prod. 69, 3–10 (2011). https://doi.org/10.1007/s00107-009-0390-5

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