European Journal of Wood and Wood Products

, Volume 67, Issue 3, pp 323–327 | Cite as

Studies on Iranian cultivated paulownia – a potential source of fibrous raw material for paper industry

  • Alireza Ashori
  • Amir Nourbakhsh
Originals Originalarbeiten


In the present work, chemical and morphological characteristics of Iranian cultivated paulownia (Paulownia fortunei L.) fibers were investigated. Chemical properties including holocellulose (81.2%), alpha-cellulose (52.6%), lignin (24.6%) and extractives (1% NaOH 14.7%) contents were determined. Fiber length, width, width of lumen and cell wall thickness were 1002, 35.44, 26.49 and 6.47 µm, respectively. The paulownia wood contains a significant portion of parenchyma cells and vessel elements compared to the hardwoods being mainly fibrous. The short length and thin-walled fibers may be expected to give relatively dense papers which are weak in tearing strength, but are superior in burst and tensile properties. Paulownia has acceptable Runkel ratio and flexibility coefficient are in the range of hard and softwoods, respectively. In general, results based on chemical and morphological analysis indicated that Iranian cultivated paulownia fibers are promising fibrous raw material for the paper production.


Lignin Lignin Content Kenaf Cell Wall Thickness Slenderness Ratio 
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Im Iran angebaute Paulownie als möglicher Faserrohstoff für die Papierindustrie


In der vorliegenden Arbeit wurden die chemischen und physikalischen Eigenschaften von Fasern der im Iran angebauten Paulownie (Paulownia fortunei L.) untersucht. Dabei wurden die chemischen Eigenschaften einschließlich des Gehalts an Holocellulose (81.2%), Alphacellulose (52.6%), Lignin (24.6%) und Extraktstoffen (1% NaOH, 14.7%) bestimmt. Die Faserlänge betrug 1002 µm, die Faserbreite 35.44 µm, die Lumenweite 26.49 µm und die Zellwanddicke 6.47 µm. Im Vergleich zu anderen Laubhölzern mit hohem Faseranteil enthält das Holz der Paulownie einen hohen Anteil an Parenchymzellen und Gefäßgliedern. Es ist anzunehmen, dass die kurzen und dünnwandigen Fasern ein relativ dichtes Papier mit schlechter Reißfestigkeit jedoch guten Berst- und Zugfestigkeitseigenschaften liefern. Das Runkel-Verhältnis ist akzeptabel und die Flexibilitätskoeffizienten liegen im Bereich von Nadel- und Laubhölzer. Die Ergebnisse der chemischen und morphologischen Analyse zeigten, dass die Holzfaser der im Iran angebauten Paulownie ein viel versprechendes Rohmaterial für die Papierherstellung ist.


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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  1. 1.Department of Chemical IndustriesIranian Research Organization for Science and Technology (IROST)TehranIran
  2. 2.Department of Chemical IndustriesResearch Institute of Forests and Rangelands (RIFR)TehranIran

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