Interaction of copper-containing preservatives with wood. Part 1. Mechanism of the interaction of copper with cellulose

被引：15

作者：

Druz, N ^{[1
]}

Andersone, I ^{[1
]}

Andersons, B ^{[1
]}

机构：

[1] Latvian State Inst Wood Chem, LV-1006 Riga, Latvia

来源：

HOLZFORSCHUNG | 2001年 / 55卷 / 01期

关键词：

cellulose; copper preservatives; fixation; sorption; ESR; XPS; EDXA;

D O I：

10.1515/HF.2001.003

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

In the present work. the stare of the copper ions absorbed by cellulose from aqueous solutions with different pH values has been studied by electron spin resonance (ESR), X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray analysis (EDXA) methods, It has been shown that the curve of copper sorption has a S-like shape characteristic for weak acid sorbents. At all pH values in ESR-spectra, an anisotropic Cu(II)-signal is registered. At pH >4, the anisotropy of ESR-spectra decreases. At pH = 10, complexes connected by exchange interactions and diamagnetic clusters are formed. After the leaching of specimens, the ESR-signal practically disappeared. The decrease of the copper content in cellulose did not correlate with the change of the integral intensity of the spectra. The changes in ESR-spectra of copper-containing cellulose after leaching were explained by the formation of the Cu(II) diamagnetic clusters.

引用

页码：13 / 15

页数：3

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