Identification of Cupric and Cuprous Copper in Copper Naphthenate-Treated Wood by X-Ray Photoelectron Spectroscopy
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P. Kamdem
Summary
X-ray photoelectron spectroscopy (XPS) was used to monitor the modification on copper naphthenate (Cu-N) treated Southern pine and the effect of a post treatment steaming on Cu-N treated samples. The atomic ratio of oxygen to carbon (O1s/C1s) decreases with Cu-N treatment, confirming the coverage of the sample surface with Cu-N, which is rich in -CH2- groups. XPS spectra and Auger parameters were successively used to identify and quantify Cu (I) and Cu (II) on the surface of Cu-N treated samples. The peak at 935 eV and the presence of shake up satellites are a good indication of the presence of cupric copper, while the peak at 933 eV and the disappearance of shake-up satellites are attributed to the presence of cuprous copper. The post-treatment steaming of Cu-N treated Southern pine cubes results in the conversion of 52 percent of the cupric copper into cuprous copper on the wood surface.
Copyright © 2001 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
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- Measurement of Wood Wettability by the Wilhelmy Method. Part 1. Contamination of Probe Liquids by Extractives
- Measurement of Wood Wettability by the Wilhelmy Method. Part 2. Determination of Apparent Contact Angles
- Biomechanical Pulping of Agave sisalana
- Oxidation of Benzyl Alcohols by the Laccase-Mediator System (LMS) a Comprehensive Kinetic Description
- Chemical Modification of Wood by Polyglycerol/Maleic Anhydride Treatment
- Relationship between Released Strain and Growth Rate in 39 Year-Old Tectona grandis Planted in Indonesia
- Reduction of Residual Stresses in Medium Density Fibreboard. Part 1. Taguchi Analysis
- Reduction of Residual Stresses in Medium Density Fibreboard. Part 2. Effects on Thickness Swell and Other Properties
- Evaluation of Pettys Nonlinear Model in Wood Permeability Measurement
- Dielectric Relaxation Based on Adsorbed Water in Wood Cell Wall under Non-Equilibrium State 2
- Preparation and Properties of Acetylated and Propionylated Wood-Silicate Composite
- The Flakes Alignment Efficiency and Orthotropic Properties of Oriented Strand Board
- Walter Liese 75 Years Young
- Literature Reports
