应用ATR-FTIR研究铜唑类防腐剂在竹材中的固着机理

以竹材作为试验材料，研究铜唑类防腐剂在竹材中的固着机理。研究的目的在于了解铜唑防腐剂与竹材的相互作用的具体情况，从理论上为防腐剂配方的设计和优化、防腐处理工艺改良提供依据。制备竹材木质素和竹材综纤维素，采用衰减全反射傅里叶红外光谱研究铜唑防腐剂与竹材主要组分的相互作用，结果表明药剂处理后木质素的红外谱图发生了明显的变化，木质素的特征峰(1 510 cm-1附近)变化较大，木素的酚羟基参与了木质素-铜络合物的形成;药剂处理后综纤维素的谱图变化不大，只是半纤维素的羧基以及半纤维素的酰氧键(CO—O)伸缩振动发生变化，说明铜唑类防腐剂在竹材中的固着主要在发生半纤维素和木质素上。

Study on Fixation Mechanism of CuAz Preservatives in Bamboo by ATR-FTIR

The fixation mechanism of CuAz preservatives in bamboo was studied with bamboo as the experimental material in the present paper. The purpose of the study is to understand the interaction between preservatives and bamboo, provide a theoretical basis for the design and optimization of preservatives formula and for improving preservative treatment. The chemical combination between preservatives and bamboo components was analysed by ATR Fourier transform infrared spectroscopy (ATR-FTIR), and the results show that the infrared spectra of lignin after treatment changed significantly. The lignin characteristic peaks (1 510 cm^-1 ) changed obviously. Lignin phenolic hydroxyl was involved in the lignin-copper complex formation. Holocellulose＇ s spectra after treatment changed little, with just a change in hemicellulose carboxyl and hemicellulose acyl-oxygen bond (C-O) stretching vibration.