Influence of Hemicellulose Extraction on Water Uptake Behavior of Wood Strands


  • Yang Zhang
  • Omid Hosseinaei
  • Siqun Wang
  • Zhaobing Zhou


Water uptake, wettability, hemicelluloses, hot-water extraction, enzyme treatment


Hemicellulose is the most hydrophilic and unstable of wood polymers. This study examined the effect of decreasing the amount of hemicellulose in wood on wettability and water uptake behavior of wood strands. Two methods were used for decreasing hemicellulose in wood strands: hot-water extraction and enzyme treatment. Contact angle measurements showed a decrease in wettability of wood strands after hot-water extraction of hemicellulose. These results indicated a decrease in hydrophilic character of wood strands. Amount of water taken up by strands treated with hot-water extraction decreased as percentage of mass loss increased. The enzyme-pretreated wood strands also absorbed water at lower rates compared with untreated samples. Results indicated that hemicellulose has a great influence on water absorption of wood and that decreasing hygroscopocity of wood by extraction of hemicelluloses is possible.


Barrera-Garcia VD, Gougeon RD, Karbowiak T, Voilley A, Chassagne D (2008) Role of wood macromolecules on selective sorption of phenolic compounds by wood. J Agric Food Chem 56(18):8498-8506.nBoonstra MJ, Tjeerdsma B (2006) Chemical analysis of heat treated softwoods. Holz Roh Werkst 64(3):204-211.nEsperta A, Vilaplana F, Karlsson S (2004) Comparison of water absorption in natural cellulosic fibers from wood and one-year crops in polypropylene composites and its influence on their mechanical properties. Compos Part A-Appl S 35:1267-1276.nGarcia RA, Riedl B, Cloutier A (2008) Chemical modification and wetting of medium density fibreboard produced from heat-treated fibers. J Mater Sci 43 (15):5037-5044.nGardner J, Flowers JC, Elder TJ, Waagea SK (1990) Bonding flakeboard with filled and extended phenol formaldehyde resin. Forest Prod J 40(7/8):31-36.nGérardin P, Petric M, Petrissans M, Lambert J, Ehrhrardt JJ (2007) Evaluation of wood surface energy after heat treatment. Polym Degrad Stabil 92:653-657.nHawke R, Sun B, Gale M (1993) Effect of fiber mat moisture content on physical properties of polyisocyanate-bonded hardboard. Forest Prod J 43(1):15-20.nHosseinaei O, Wang S, Rials TG, Xing C, Taylor AM, Kelley SS (2011a) Effect of hemicellulose extraction on physical/mechanical properties and mold susceptibility of flakeboard. Forest Prod J (in press).nHosseinaei O, Wang S, Rials TG, Xing C, Zhang Y (2011b) Effects of decreasing carbohydrate content of wood strands on their properties. Cellulose 18(3): 841-850.nInagaki T, Yonenobu H, Tsuchikawa S (2008) Near-infrared spectroscopic monitoring of the water adsorption/desorption process in modern and archaeological wood. Appl Spectrosc 62(8):860-865.nKocaefe D, Poncsak S, Dore G, Younsi R (2008) Effect of heat treatment on the wettability of white ash and soft maple by water. Holz Roh Werkst 66(5):355-361.nLu C, Lam F (2001) Relationship between thickness swelling and mat structures in robot-formed flakeboard mats. Holz Roh Werkst 59:201-210.nMetsa-Kortelainen S, Antikainen T, Viitaniemi P (2006) The water absorption of sapwood and heartwood of Scots pine and Norway spruce heat-treated at 170°C, 190°C, 210°C and 230°C. European Journal of Wood and Wood Products 64(3):192-197.nParedes JJ, Jara R, Shaler SM, VanHeiningen ARP (2009) Surface characterization of red maple strands after hot water extraction. Wood Fiber Sci 41(1):38-50.nPetric M, Knehtl B, Krause A, Militz H, Pavlič M, Pétrissans M, Rapp A, Tomažič M, Welzbacher C, Philippe Gérardin P (2007) Wettability of waterborne coatings on chemically and thermally modified pine wood. J Coat Technol Res 4(2):203-206.nPétrissans M, Gérardin P, Elbakali I, Serraj M (2003) Wettability of heat-treated wood. Holzforschung 57(3):301-307.nPlus J, Tenkanen M, Korte HE, Poutanen K (1991) Products of hydrolysis of beechwood acetyl-4-O-methylglucuronoxylane by a xylanase and acetyl xylane esterase. Enzyme Microb Technol 13(6):483-486.nPoutanen K, Puls J, Linko M (1986) The hydrolysis of steamed birchwood hemicellulose by enzymes produced by Trichoderma reesei and Aspergillus awamori. Appl Microbiol Biot 23(6):487-490.nSattler C, Labbe N, Harper D, Elder T, Rials T (2008) Effects of hot water extraction on physical and chemical characteristics of oriented strand board (OSB) wood flakes. Clean-Soil Air Water 36(8):674-681.nSon J, Gardner DJ (2004) Dimensional stability measurements of thin wood veneers using Wilhelm plate technique. Wood Fiber Sci 36(1):98-106.nTjeerdsma BF, Militz H (2005) Chemical changes in hydrothermal treated wood: FTIR analysis of combined hydrothermal and dry heat-treated wood. Holz Roh Werkst 63:101-111.nWalinder MEP, Gardner DJ (1999) Factors influencing contact angle measurements on wood particles by column wicking. J Adhes Sci Technol 13(12):1363-1374.nWang S, Winistorfer PM (2001) Flake compression behavior in a resin less mat as related to dimensional stability. Wood Sci Technol 35:379-393.nZhang J, Heiss C, Thorne PG, Bal C, Lynd LR (2009) Formation of ethyl beta-xylopyranoside during simultaneous saccharification and co-fermentation of paper sludge. Enzyme Microb Technol 44(4):196-202.nZhang Y, Jin J, Wang S (2007) Effects of resin and wax on water uptake behavior of wood strands. Wood Fiber Sci 39(2):271-278.n






Research Contributions