The use of organo alkoxysilane coupling agents for wood preservation
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C.A.S. Hill
Abstract
Corsican pine (Pinus nigra) sapwood was treated with methanolic solutions of two organo alkoxysilanes ([γ-(methacryloxy)propylx] trimethoxy silane (TMPS), or vinyl trimethoxy silane (VTMS)). Various treatment parameters were studied in order to determine the optimum method for obtaining a stable weight percentage gain. For TMPS, it was found that best results were obtained when a free-radical initiator was used in conjunction with the silane. This indicates that polymerisation of this species occurs via the pendant methacryloxy moeity, a result confirmed by solid-state nuclear magnetic resonance studies of the treated wood. For VTMS, wood moisture content had a profound influence upon the weight percentage gain due to treatment, with higher weight percentage gains obtained as wood moisture content was increased. This indicates that polymerisation in this case occurred via the formation of silanol groups to form siloxane linkages. Solid-state NMR confirmed that the double bond of the organo-functional group was intact after polymerisation had occurred. Modified wood samples were then prepared using optimised treatments for each silane. The wood was prepared to a variety of weight percentage gains and the effect of treatment on the dimensional stability and decay properties of the treated material studied. Treatment of Corsican pine sapwood with the two organo-alkoxy silanes, resulted in only moderate increases in dimensional stabilisation, with anti shrink efficiency values (after 5 water-soak/oven-dry cycles) no greater than 40%. Treatments were found to be relatively stable to hydrolysis. Some differences were observed in the effectiveness of the two silanes in providing protection. Full decay protection required high treatment levels with the silanes.
Copyright © 2004 by Walter de Gruyter GmbH & Co. KG
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- Changes in the fiber wall during refining of bleached pine kraft pulp
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- Changes in the surface properties of wood due to sanding
- Use of near infrared spectroscopy to predict the mechanical properties of six softwoods
- The creep of wood destabilized by change in moisture content. Part 1: The creep behaviors of wood during and immediately after drying
- Modeling the process of desorption of water in oak (Quercus robur L.) wood
- Moisture adsorption thermodynamics of wood from fractal-geometry approach
- Application of ionic liquids for electrostatic control in wood
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- Environmentally-benign wood preservatives based on an organic biocide:antioxidant combination: Ground-contact efficacy ratings and BHT depletion after four years of exposure
- Production of 2,5-dimethoxyhydroquinone by the brown-rot fungus Serpula lacrymans to drive extracellular Fenton reaction
- Fungal decay resistance of wood reacted with phosphorus pentoxide-amine system
- The use of organo alkoxysilane coupling agents for wood preservation
- Phenolic extractives from wood of birch (Betula pendula)
- Stability of arylglycerols during alkaline cooking
Articles in the same Issue
- The Bremen Cog of 1380 – An electron microscopic study of its degraded wood before and after stabilization with PEG
- Ultrastructure of iodine treated wood
- Effects of refining on the fibre structure of kraft pulps as revealed by FE-SEM and TEM: Influence of alkaline degradation
- Changes in the fiber wall during refining of bleached pine kraft pulp
- An unusual formation of tension wood in a natural forest Acacia sp.
- Changes in the surface properties of wood due to sanding
- Use of near infrared spectroscopy to predict the mechanical properties of six softwoods
- The creep of wood destabilized by change in moisture content. Part 1: The creep behaviors of wood during and immediately after drying
- Modeling the process of desorption of water in oak (Quercus robur L.) wood
- Moisture adsorption thermodynamics of wood from fractal-geometry approach
- Application of ionic liquids for electrostatic control in wood
- Ionic liquids in wood preservation
- New bis-quaternary ammonium and bis-imidazolium chloride wood preservatives
- Environmentally-benign wood preservatives based on an organic biocide:antioxidant combination: Ground-contact efficacy ratings and BHT depletion after four years of exposure
- Production of 2,5-dimethoxyhydroquinone by the brown-rot fungus Serpula lacrymans to drive extracellular Fenton reaction
- Fungal decay resistance of wood reacted with phosphorus pentoxide-amine system
- The use of organo alkoxysilane coupling agents for wood preservation
- Phenolic extractives from wood of birch (Betula pendula)
- Stability of arylglycerols during alkaline cooking
