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

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 

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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  1. 1.
    Ashori A (2006a) Non-wood fibers – A potential source of raw material in papermaking. Polym-Plast Technol Eng J 45(10):1133–1136CrossRefGoogle Scholar
  2. 2.
    Ashori A (2006b) Pulp and paper from kenaf bast fibers. Fibers Polym J 7(1):26–29CrossRefGoogle Scholar
  3. 3.
    Binotto AP, Nicholls GA (1977) Correlation of fiber morphological variation and wet mat compressibility of loblolly pine bleached kraft pulp. Tappi 60(6):91–94Google Scholar
  4. 4.
    Caparrós S, Díàz MJ, Ariza J, Lóez F, Jiménez F (2008) New perspectives for Paulownia fortunei L. valorization of the autohydrolysis and pulping processes. Biores Technol 99(4):741–749CrossRefGoogle Scholar
  5. 5.
    Çöpür Y, Güler C, Akgül M, Taşçio~glu C (2007) Some chemical properties of hazelnut husk and its suitability for particleboard production. Build Environ 42(7):2568–2572CrossRefGoogle Scholar
  6. 6.
    Dence CW, Lin YS General structural features of lignin. In: Methods in Lignin Chemistry. Springer-Verlag, BerlinGoogle Scholar
  7. 7.
    Eroglu H (1998) Fiberboard industry. Karadeniz Technical University. Publication No. 304, Trabzon, TurkeyGoogle Scholar
  8. 8.
    Franklin GL (1945) Preparation of thin sections of synthetic resins and wood-resin composites, and a new macerating method for wood. Nature 155(3924):51–59CrossRefGoogle Scholar
  9. 9.
    Jang HF, Seth RS (1998) Using confocal microscopy to characterize the collapse behavior of fibers. Tappi J 81(5):167–174Google Scholar
  10. 10.
    Kalaycioglu H, Deniz I, Hiziroglu S (2005) Some of the properties of particleboard made from paulownia. J Wood Sci 51(4):410–414CrossRefGoogle Scholar
  11. 11.
    Li P, Oda J (2007) Flame retardancy of paulownia wood and its mechanism. J Mater Sci 42(20):8544–8550CrossRefGoogle Scholar
  12. 12.
    Silvestre AJD, Evtuguin DV, Sousa APM, Silva AMS (2005) Lignans from a hybrid Paulownia wood. Biochem Syst Ecol 33(12):1298–1302CrossRefGoogle Scholar
  13. 13.
    TAPPI Test Methods. Tappi Press, Atlanta, GAGoogle Scholar
  14. 14.
    TAPPI Useful Methods. Tappi Press. Atlanta, GAGoogle Scholar
  15. 15.
    Wise LE, Karl HL (1962) Cellulose and hemicellulose in pulp and paper science and technology. In: Earl LC (ed), vol. 1. McGraw Hill Book Co, New YorkGoogle Scholar

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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