Abstract
A CrO3/guajacyl polymeric complex was prepared and characterized. The increased crosslinking of the lignin network in wood afforded by the equivalent CrO3/guajacyl units complexes as well as the insolubility of these complexes are the cause of the enhanced water resistance presented by the CrO3-treated wood. Chromium trioxide was found to be the complexing species. Chromium (VI) was not reduced to chromium (III) during the treatment. A parallel with the lignosulfonates/dichromate gel formation was made.
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