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Article: THE EFFECTS OF SUPERCRITICAL [CO.sub.2] ON THE BENDING PROPERTIES OF FOUR REFRACTORY WOOD SPECIES.
- Article from:
- Forest Products Journal
- Article date:
- November 1, 2000
- Author:
CopyrightCOPYRIGHT 2000 Forest Products Society. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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MATTHEW E. ANDERSON [* ]
ROBERT J. LEICHTI [*]
JEFFREY J. MORRELL [*]
ABSTRACT
The effects of three supercritical fluid (SCF) treatment parameters on the bending properties and development of treatment defects were studied in Douglas-fir, yellow-poplar, western redcedar, and Engelmann spruce. Two rates of pressurization (0.34 and 3.44 MPa/min.), two treatment pressures (10.34 and20.69 MPa), and two venting rates (0.34 and 3.44 MPa/min.) were examined on small, clear specimens of each species, using one treatment temperature (60[degrees]C) and one treatment time (30 min.). Supercritical treatment of yellow-poplar produced no ...