Formation and properties of nanocomposites made up from solid aspen wood, melamine-urea-formaldehyde, and clay
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Xiaolin Cai
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.
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©2007 by Walter de Gruyter Berlin New York
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Artikel in diesem Heft
- Characterization of thin water layers in pulp by tritium exchange. Part 1: Methods development
- Characterization of thin water layers in pulp by tritium exchange. Part 2: Effect of refining on water absorption
- Characterizing wood fiber and particle length with a mixture distribution and a segmented distribution
- Effect of photolysis on 17th/18th century paper
- Changes in the cell wall volume of a number of wood species due to reaction with acetic anhydride
- A novel simple route to wood acetylation by transesterification with vinyl acetate
- Formation and properties of nanocomposites made up from solid aspen wood, melamine-urea-formaldehyde, and clay
- Ellagitannins from Portuguese oak wood (Quercus pyrenaica Willd.) used in cooperage: influence of geographical origin, coarseness of the grain and toasting level
- Epimeric phenylpropanoid glycosides from inner bark of Paulownia coreana Uyeki
- Lipid and lignin composition of woods from different eucalypt species
- A hysteresis model suitable for numerical simulation of moisture content in wood
- Simple estimation of critical stress intensity factors of wood by tests with double cantilever beam and three-point end-notched flexure
- Screening fungi tolerant to Western red cedar (Thuja plicata Donn) extractives. Part 1. Mild extraction by ultrasonication and quantification of extractives by reverse-phase HPLC
- Screening fungi tolerant to Western red cedar (Thuja plicata Donn) extractives. Part 2. Development of a feeder strip assay
- Contribution of hardness to the natural resistance of a range of wood species to attack by the marine borer Limnoria
- Biodeterioration of treated Pinus radiata timber by Australian decay fungi and the termite Coptotermes acinaciformis in laboratory bioassays and field conditions
- Development of an accelerated soil-contact decay test
- Obituary Dr. Bo Hortling (1942–2006)
