漂白针叶木硫酸盐浆两步处理制备黏胶纤维用溶解浆  

Two stages treatment to upgrade bleached softwood papergrade-pulp to dissolving pulp for viscose production

作　　者：吕东[1] 吴可佳[1,2] 孔凡功[2] 王海松[1,2] 

机构地区：[1]中国科学院生物基材料重点实验室,中国科学院青岛生物能源与过程研究所,山东青岛266101 [2]制浆造纸科学与技术教育部重点实验室,齐鲁工业大学,济南250353

出　　处：《中华纸业》2016年第4期18-22,共5页China Pulp & Paper Industry

基　　金：国家自然基金项目(21206184,31370582);制浆造纸科学与技术教育部重点实验室开放基金资助项目

摘　　要：以漂白针叶木硫酸盐浆为原料,探讨了生物酶和碱性过氧化氢处理两步法制备黏胶纤维用溶解浆的可能性。研究发现,市售化学浆经工业酶L-10(主要成分为内切葡聚糖酶)处理后浆粕反应性能可达到80%,而使用氢氧化钠和过氧化氢处理能够继续提高浆粕的α-纤维素含量和改善黏度。在L-10纤维素酶用量300I U/g将化学浆改性后,再使用9wt%氢氧化钠和1wt%过氧化氢处理,所得浆粕的反应性能为68.7%,α-纤维素含量为92.1%,浆粕黏度为506.9m l/g,达到黏胶纤维用溶解浆的质量标准。To convert bleached softwood paper-grade pulp into dissolving pulp for viscose application, two stages treatment consisting of enzymatic treatment and alkaline peroxide treatment were investigated. It was found that high reactivity （about 80%） of pulp could be achieved by endoglucanases （EG）-rich industrial treatment, and the a-cellulose content as well as the viscosity of enzymatically treated pulp can be further adjusted by the alkaline peroxide treatment with certain dosages of NaOH and H2O2 to finally meet the quality requirements of dissolving pulp. The resulting pulp with 68.7% of reactivity, 92.1% of cellulose content, and 506.9 ml/g of pulp viscosity could be obtained after the two stages of treatments. The appropriate dosage of EG-rich cellulose was 300 IU/g bone dry pulp in the stage of enzymatic treatment, while the suitable dosages of NaOH and H202 were 9 wt% and 1 wt%, respectively, in the stage of alkaline peroxide treatment.

关 键 词：溶解浆 纤维素酶 碱性过氧化氢 黏胶纤维 

分 类 号：TS749[轻工技术与工程—制浆造纸工程]