Organo-silane compounds in medium density fiberboard: physical and mechanical properties

Abstract

We studied the effects of nanoparticles of organo-silane (NOS) compounds in the size range of 20–80 nm on physical and mechanical properties in medium density fiberboard, and used NOS at four consumption levels of 0, 50, 100, and 150 g kg⁻¹ dry wood fibers. Density of all treatments was kept constant at 0.67 g cm⁻³. The water-repellent property of organo-silane significantly reduced water absorption (WA) and thickness swelling but mechanical properties declined due to the reduced proportion of wood-fiber as organo-silane was added to the matrix: the compression ratio of MDF panels and the integrity among wood-fibers both declined, resulting in reduced mechanical properties. We recommend use of 50 g of NOS/kg wood-fiber to improve WA and thickness swelling while retaining acceptable mechanical properties.

Keywords

Composite-board / Medium-density fiberboard (MDF) / Nanotechnology / Physical and mechanical properties / Water-repellant / Organo-silane

References

[1] Baileys JK, Marks BM, Ross AS, Crawford DM, Krzysik AM, Muehl JH, Youngquist JA. Providing moisture and fungal protection to wood-based composites. For Prod J, 2003, 53(1): 76-81.

[2] Eshaghi S, Faezipour M, Taghiyari HR. Investigation on lateral resistance of joints made with drywall and sheet metal screws in bagasse particleboard and comparison with that of commercial MDF. Maderas-Cienc Tecnol, 2013, 15(2): 127-140.

[3] Gardner DJ, Tascioglu C, Walinder MEP. Goodell B, Nicholas DD, Schultz TP. Wood composite protection. Wood detrioration and preservation: advances in our changing world. 2003, Washington, DC: American Chemical Society, 399 419

[4] Ghorbani M, Akhtari M, Taghiyari HR, Kalantari A. Effects of silver and zinc-oxide nanoparticles on gas and liquid permeability of heat-treated Paulownia wood. Austrian J For Sci, 2012, 129(1): 106-123.

[5] Haghighi Poshtiri A, Taghiyari HR, Karimi AN. The optimum level of nano-wollastonite consumption as fire-retardant in poplar wood (Populus nigra). Int J Nano Dimens, 2013, 4(2): 141-151.

[6] Khojier K, Zolghadr S, Zare N. Structural, electrical, and optical properties of molybdenum oxide thin films prepared by post-annealing of Mo thin films. Int J Bio-Inorg Hybrid Nanomater, 2012, 1(3): 199-207.

[7] Kirkpatrick JW, Barnes HM (2006) Biocide treatments for wood composites—a review. In: 37th annual meeting—the international research group on wood protection. Document No. IRG/WP 06-40323, Tromso, Norway

[8] Laks PE (2002) Biodegradation susceptibility of untreated engineered wood products. In: Enhancing the eurability of lumber and engineered wood products. FPS symposium proceedings no. 7249. Madison, Forest Products Society, pp 125–130

[9] Phuong LX, Shida S, Saito Y. Effects of heat treatment on brittleness of Styrax tonkinensis wood. J Wood Sci, 2007, 53: 181-186.

[10] Poda AR, Moser RD, Duddy MF, Doorenbos Z, Lafferty BJ, Weiss CA Jr, Harmon A, Chappell MA, Steevens JA. Nano-aluminum thermite formulations: characterizing the fate properties of a nanotechnology during use. J Nanomater Mol Nanotechnol, 2013, 2 1

[11] Taghiyari HR. Fire-retarding properties of nano-silver in solid woods. Wood Sci Technol, 2012, 46(5): 939-952.

[12] Taghiyari HR. Nano-zycosil in MDF: gas and liquid permeability. Eur J Wood Wood Prod , 2013, 71(3): 353-360.

[13] Taghiyari HR, Enayati A, Gholamiyan H. Effects of nano-silver impregnation on brittleness, physical and mechanical properties of heat-treated hardwoods. Wood Sci Technol, 2013, 47(3): 467-480.

[14] Valenzuela J, von Leyser E, Pizzi A, Westermeyer C, Gorrini B. Industrial production of pine tannin-bonded particleboard and MDF. Eur J Wood Wood Prod, 2012, 70(5): 735-740.