Formation and properties of nanocomposites made up from solid aspen wood, melamine-urea-formaldehyde, and clay

Abstract

Wood polymer nanocomposites were prepared from solid aspen wood, water-soluble melamine-urea-formaldehyde (MUF) resin, and silicate nanoclays. The nanofillers were ground with a ball-mill before being mixed with the MUF resin and impregnated into the wood. The water-soluble prepolymer was mixed with the nanoclays at a mixing speed of 3050 rpm for 20 min to form impregnation solutions. Wood was impregnated with resin, which polymerized in situ under certain conditions. The physical and mechanical properties of the composite and the effect of ball-milling treatment of nanofillers on these properties were investigated. Significant improvements in physical and mechanical properties, such as density, surface hardness, and modulus of elasticity, were obtained for specimens impregnated with MUF resin and nanoclay-MUF resin mixtures. Ball-mill treatment favors dispersion of the nanofillers into the wood, but also appears to interfere with particle-resin adhesion.

Impact of a reinforcement treatment with acrylate impregnation on the mechanical behavior of black spruce as connector member

“…Improvement of wood properties by increasing its water repellent capacity, dimensional stability, or flame retardancy was done by Mathias, et al [12], Hazarika, et al [13], Wang, et al [14], Cai, et al [15], Islam, et al [16], Bailing, et al [17], Devi, et al [18]. Furthermore, it is well known that adding nanoparticles leads to better results, such as increase of hardness or dynamic Young's modulus, [15] [19] [16]. With the aim to improve the mechanical properties of wood, Bergman, et al [20] used impregnation and coating.…”

The Effects of Acrylate Impregnation of Black Spruce Timber as Connectors Strength

“…Improvement of wood by increasing its water repellent properties, dimensional stability, or flame resistance was done by Mathias et al (1991), Hazarika et al (2012), Wang et al (2014), Cai et al (2007), Islam et al (2012), and Sun et al (2013). Furthermore, adding nanoparticles leads to better results, such as increase of hardness or dynamic Young's modulus (Cai et al 2007(Cai et al , 2008Shi et al 2007;Islam et al 2012). With the aim to improve the mechanical properties of wood, Bergman et al (2009) used impregnation and coating.…”

Preparation and characterization of wood/styrene‐acrylonitrile copolymer/MMT nanocomposite

“…Various nanounits such as nanoparticles, nanotubes, nanolayers could be accommodated into wood for improvement of strength, moisture resistance, dimensional stability, etc 12. Cai et al13 prepared wood plastic nanocomposite by impregnation of melamine urea formaldehyde resin and different alluminosilicate nanofillers into solid aspen wood. They reported that impregnation of hydrophobic nanofillers dispersed in MUF prepolymer into wood improved significantly surface hardness, modulus of elasticity, and water repellency.…”