Abstract
Wood contains primary extractives, which are present in all woods, and secondary extractives, which are confined in certain wood species. Extractives in wood play a major role in wood-bonding processes, as they can contribute to or determine the bonding relevant properties of wood such as acidity and wettability. Therefore, extractives play an immanent role in bonding of wood chips and wood fibres with common synthetic adhesives such as urea-formaldehyde-resins (UF-resins) and phenol-formaldehyde-resins (PF-resins). Extractives of high acidity accelerate the curing of acid curing UF-resins and decelerate bonding with alkaline hardening PF-resins. Water-soluble extractives like free sugars are detrimental for bonding of wood with cement. Polyphenolic extractives (tannins) can be used as a binder in the wood-based industry. Additionally, extractives in wood can react with formaldehyde and reduce the formaldehyde emission of wood-based panels. Moreover, some wood extractives are volatile organic compounds (VOC) and insofar also relevant to the emission of VOC from wood and wood-based panels.
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References
Aehlig K (2004) Holz oder Holzwerkstoff, Verfahren zu deren Herstellung. DE10 2005 046 345 B4
Anonymus (1989) Bonding wood and wood products. In: Handbook of wood and wood-based materials for engineers, architects and builders, Forest Products Laboratory (U.S.), ISBN 978–0891161240: p 470
Back E (2000) Emission of volatile compounds in pitch control, wood resin and deresination. Ernst Back, Lawrence H. Allen, ISBN 0-89852-519-5, p 376–381
Chen CM (1970) Effect of extractive removal on adhesion and wettability of some tropical woods. For Prod J 20(1):36–41
Dietrichs HH (1964) Das Verhalten von Kohlenhydraten bei der Holzverkernung. Holzforschung 18:14–24
Freudenberg K (1920) Die Chemie der natürlichen Gerbstoffe. Springer-Verlag, Berlin Heidelberg GmbH. 164 S
Gabriel M, Paczkowski S, Nicke S, Schütz S, Behn C, Kraft R, Roffael E (2015) Effect of some treatments on emission of volatile organic compounds (VOC) from chips used in pellets making process. Int Wood Prod J 6(2):60–68
Gäumann E (1928) Die chemische Zusammensetzung des Fichten- und Tannenholzes in den verschiedenen Jahreszeiten. Flora N F 123:344–385
Hoffmann T, Klockow D (1993) Field and laboratory studies on terpene emissions from trees under different environmental conditions. In Air Pollution Research Report 47 “General assessment of biogenic emissions and deposition of nitrogen compounds, sulphur compounds and oxidants in Europe”, p 261–270
Kadir AA, Sudin R (1989) Carbohydrates in rubberwood (Hevea brasiliensis Muell.). Holzforschung 43(3):173–178
Kläusler OF (2014) Improvement of one-component polyurethane bonded wooden joints under wet conditions. Dissertation ETH Zürich, 2014
Knorz M, Niemz P, van de Kuilen J-W (2015) Measurement of moisture-related strain in bonded ash depending on adhesive type and glueline thickness. Holzforschung. doi:10.1515/hf-2014-0324
Lelis R (1992) Zum Verhalten von Splint- und Kernholz der Kiefer bei der Verleimung mit Harnstofformaldehydharzen (UF-Harzen) und Diisocyanat-Klebstoffen (PMDI). Magisterarbeit an der Forstlichen Fakultät der Georg-August-Universität Göttingen
Lelis R (1995) Zur Bedeutung der Kerninhaltsstoffe obligatorisch verkernter Nadelbaumarten bei der Herstellung von feuchtebeständigen und biologisch resistenten Holzspanplatten, am Beispiel der Douglasie [Pseudotsuga menziesii (Mirb.) Franco]. Dissertation am Forstwissenschaftlichen Fachbereich der Georg-August-Universität Göttingen, Juni 1995
Ohnesorge D, Richter K, Becker G (2010) Influence of wood properties and bonding parameters on bond durability of European beech [Fagus sylvatica L.]. glulams. Ann For Sci 67(6):601
Roffael E, Dix B (1994) unpublished work
Roffael E, Rauch W (1974) Extraktstoffe in Eiche und ihr Einfluss auf die Verleimbarkeit mit alkalischen Phenolformaldehydharzen. Holz Roh Werkst 32:182–187
Roffael E, Schäfer, M (2002) Bedeutung der Extraktstoffe des Holzes in biologischer, chemischer und technologischer Hinsicht. Hrsg. Institut für Holzbiologie und Holztechnologie der Georg-August-Universität Göttingen Büsgenweg 4, 37077 Göttingen. 76 S
Roffael E, Rauch W, Bismarck C (1975) Formaldehydabgabe und Festigkeitsausbildung bei der Verleimung von Eichenspänen mit Harnstofformaldehydharzen. Holz Roh Werkst 33:271–275
Roffael E, Dix B, Okum J (2000) Use of spruce tannin as a binder in particleboards and medium density fibreboards (MDF). Holz Roh Werkst 58:301–308
Roffael E, Dix B, Schneider T (2001) Zur Verwendung von Tanninen als Bindemittel in der Holzwerkstoffindustrie. Forstarchiv 73(1):15–22
Sachsse H, Roffael E (1993) Untersuchungen der Schälfurnier-Eignung von in Deutschland erwachsenem Douglasienholz. Holz Roh Werkst 51:167–176
Sandermann W, Dehn U v (1951) Einfluß chemischer Faktoren auf die Festigkeitseigenschaften zementgebundener Holzwolleplatten. Holz Roh Werkst 9:97–101
Schulz H (1972) Holz im Kreislauf der Wirtschaftsgüter. Verbesserte Eigenschaft von Holz und Holzwerkstoffen. Holz-Zentralblatt 102:1415–1417
Slay JR, Short PH, Wright DC (1980) Catalytic effects of extractives from pressure-refined fibre on the gel time of urea-formaldehyde resin. For Prod J 30(3):22–23
Uhde E (2010) Die natürlichen Emissionen der wichtigsten Bauhölzer sowie Emissionen leimhaltiger Holzwerkstoffe. Vortrag gehalten an der Fachhochschule in Eberswalde
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Roffael, E. Significance of wood extractives for wood bonding. Appl Microbiol Biotechnol 100, 1589–1596 (2016). https://doi.org/10.1007/s00253-015-7207-8
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DOI: https://doi.org/10.1007/s00253-015-7207-8