dimensional stabilization 1-9-08

dimensional stabilization 1-9-08 - Treatments that Enhance...

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1 Treatments that Enhance Physical Properties of Wood Douglas J. Gardner, Professor Wood-Polymer Hybrid Composites References • John A. Meyer (deceased) Emeritus Professor, SUNY-Syracuse • Roger Rowell, U.S. Forest Products Lab • FPL General Technical Report FPL-GTR- 55 • Wood Handbook
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2 Processes • Bending Wood – Steam – Ammonia • Plasticization • Moisture Content – 12 to 20% Treatment Processes • Diffusion (PEG treatment) • Vacuum/Pressure Processes – Chemical modification – Polymer impregnation • Heat treatment • Heat/Pressure treatment Before Treatment After Treatment
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Processes Water-soluble polymers or synthetic resins that become insoluble after curing. – Polyethylene glycol (PEG) – Impreg (PF resin) Liquid monomers that polymerize in the lumen of wood cells. – Methyl methacrylate – Epoxy resin Free radical curing – UV light – Peroxide catalysts – Radiation curing Processes • Compression of wood while heating or curing with resin
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dimensional stabilization 1-9-08 - Treatments that Enhance...

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