Abstract
Iinteractions of copper and wood components in the ACQ-D treated Chinese fir (Cunninghamia lanceolata Hook.) after hot water and hot air post-treatments were studied by using Fourier transform infrared spectroscopy (FTIR). Compared to Chinese fir (Cunninghamia lanceolata Hook.) without any treatments, significant reduction was noted at 1735±5 cm-1 assigned to carboxylic groups in the hemicellulose in all the samples with different post-treatments. The intensity of bands at 1655±5cm-1, 1510±5 cm-1 and 1265±5cm-1 are assigned to ketone carbonyl stretching groups, aromatic skeletal vibration and acetyl ether linkage in lignin were also decreased after different post-treatments compared to untreated Chinese fir. These results imply the fixation reactions of copper in the treated wood have been promoted by the post-treatment conditions, and the major bonding sites of copper in the treated wood are located in the wood lignin and hemicellulose.
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