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对于脱墨浆生产线典型部位(热分散后、后浮选后和成浆池)取样分离的纤维组分,采用四氢呋喃(THF)进行抽提。THF抽出物的FTIR表明:黏性物质中存在的成分包括饱和脂肪酸酯、聚醋酸乙烯类物质、丙烯酸类物质、含有Si-O键的有机硅化合物,以及少量的苯环邻位二取代物。将上述试样及成纸的THF抽出物进行GC-MS分析,检测出的物质可归类于合成黏合剂成分、木材抽出物成分和木素降解产物。可以看出,黏合剂类物质是纤维组分THF抽出物的主要成分。
For the typical deinked pulp production line samples (after heat dispersion, post-flotation and into the slurry tank) sampling separation of fiber components, using tetrahydrofuran (THF) for extraction. The FTIR of the THF extract showed that the components present in the viscous material include saturated fatty acid esters, polyvinyl acetates, acrylics, Si-O bond-containing organosilicon compounds, and minor amounts of ortho-disubstituted benzene rings . The THF extract from the sample and the paper was subjected to GC-MS analysis, and the detected substances were classified into the synthetic binder component, the wood extract component and the lignin degradation product. As can be seen, binders are the major component of the THF extract of the fiber component.