Abstract
In this study, the potential use of nanotechnology was evaluated to improve the thermal properties of medium density fiberboard (MDF). For this, Na+ montmorillonite (NaMMT) nanoclay was added to urea formaldehyde resin to produce MDF. In order to characterize the structure of the MDF, X-ray diffraction (XRD) and SEM observation were performed, and the thermal properties were examined using thermogravimetric analysis (TGA), differential thermal analysis (DTA), thermal conductivity test and fire test. Characterization of the MDFs shows that dispersed and exfoliated structures were generated by the hot press. The X-ray diffraction confirmed the suitable exfoliation of NaMMT in the MDFs containing NaMMT. The SEM images of NaMMT-added boards showed a suitable dispersion of NaMMT through the MDF. The results of thermal tests indicated a desirable effect of NaMMT on thermal-oxidative stability and thermal conductivity of MDF.
Zusammenfassung
In dieser Studie wurde eine mögliche Anwendung der Nanotechnologie zur Verbesserung der thermischen Eigenschaften von mitteldichten Faserplatten (MDF) untersucht. Dazu wurde bei der MDF-Herstellung Na+ Montmorillonit (NaMMT)-Nanotonerde dem Harnstoffharz beigemengt. Die Struktur der mitteldichten Faserplatte wurde anhand von Röntgenstrahlbeugung (XRD) und REM-Aufnahmen untersucht und die thermischen Eigenschaften wurden mittels thermogravimetrischer Analyse (TGA), Differenzthermoanalyse (DTA), Wärmeleitfähigkeitsprüfung und Brandprüfung bestimmt. Es zeigte sich, dass beim Heißpressen in der Platte fein verteilte, abgeschieferte Strukturen entstanden. Röntgenstrahlbeugung bestätigte die günstig wirkende Abschieferung von NaMMT in den MDF-Platten. REM-Aufnahmen der Platten mit NaMMT zeigten eine günstig wirkende Verteilung von NaMMT in den Platten. Die Ergebnisse der thermischen Prüfungen bestätigten die gewünschte Wirkung von NaMMT auf die thermisch-oxidative Stabilität und die Wärmeleitfähigkeit der MDF-Platten.
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Acknowledgements
We would like to give special thanks to Professor T. Nishino (Kobe university, Japan) for his kind cooperation in FE-SEM and XRD studies. Tarbiat Modares University of Iran is acknowledged for the SEM and thermal analysis. The authors are also thankful to Hamid Zare, S.M.J. Moosavi and M. Farjollahpour (University of Tehran, Iran) for their general help.
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Zahedsheijani, R., Faezipour, M., Tarmian, A. et al. The effect of Na+ montmorillonite (NaMMT) nanoclay on thermal properties of medium density fiberboard (MDF). Eur. J. Wood Prod. 70, 565–571 (2012). https://doi.org/10.1007/s00107-011-0583-6
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DOI: https://doi.org/10.1007/s00107-011-0583-6