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采用X射线电子能谱(XPS)分析了生物酶处理前后粉单竹磺化化学机械浆(SCMP)纤维表面化学成分的变化,探讨了生物酶预处理改善其漂白性能和白度稳定性的原因。结果表明,SCMP纤维表面的O/C比为0.40,57.45%和7.57%的纤维表面被木素和抽出物所覆盖;经脂肪酶、果胶酶处理后,其O/C比分别为0.43和0.41,纤维表面木素的含量分别为66.40%和68.41%,抽出物的含量分别为3.05%和2.03%;而经漆酶处理后其纤维表面的O/C比为0.24,且纤维表面几乎完全被木素所覆盖。说明通过脂肪酶、果胶酶和漆酶处理可以去除SCMP纤维表面的抽出物,使纤维表面暴露出更多的木素,从而提高其可漂性。
The changes of the chemical composition of the surface of SFM fibers before and after the enzyme treatment were analyzed by X-ray photoelectron spectroscopy (XPS), and the reasons for the improvement of the bleaching properties and whiteness stability of the fibers by the pretreatment of the enzyme were discussed . The results showed that the O / C ratios of SCMP fibers were 0.40, 57.45% and 7.57%, respectively, covered by lignin and extractives. The O / C ratios of lipase and pectinase treatments were 0.43 and 0.43, respectively 0.41. The content of lignin on the surface of the fiber was 66.40% and 68.41%, respectively, and the contents of the extract were 3.05% and 2.03% respectively. The O / C ratio of the fiber surface after laccase treatment was 0.24 and the fiber surface was almost completely Covered by lignin It shows that the lipase, pectinase and laccase treatment can remove the extractions of SCMP fiber surface, exposing more fiber surface to lignin and improving its bleachability.