脂肪酶预处理对粉丹竹SCMP过氧化氢高浓漂白的影响  

Effect of Lipase Pretreatment on Hydrogen Peroxide Bleaching at High Consistency of Bambusa Chung Ⅱ SCMP

作　　者：李兵云[1] 詹怀宇[1] 王双飞[2] 覃程荣[2] 梁辰[1] 付时雨[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]广西大学轻工与食品学院,广西南宁530004

出　　处：《造纸科学与技术》2009年第5期5-9,共5页Paper Science & Technology

基　　金：国家973预研项目(编号2006CB70861.4)

摘　　要：本文主要讨论了脂肪酶预处理对粉丹竹SCMP过氧化氢高浓漂白的影响。以酶预处理SCMP过氧化氢漂白纸浆白度和PC值为指标,探讨了脂肪酶用量、体系pH值、处理温度和时间等工艺参数对预处理效果的影响,得出了脂肪酶预处理的合适工艺条件为脂肪酶用量10 IU/g、pH值8、温度35℃和时间30min。另外通过X射线光电子能谱对脂肪酶预处理前后纸浆纤维表面成分进行了分析和比较,发现脂肪酶处理可以去除粉丹竹SCMP纤维表面的抽出物和部分的木素,使纤维表面暴露出更多碳水化合物。In this work, we examined the influence of operating variables [viz. lipase dosage （0- 15IU/g）, pH （7 - 10）, temperature （25 -55 ℃ ） and time （20 -60min） ] of the enzymatic pretreatment on the hydrogen peroxide bleaching of Bambusa chung Ⅱ SCMP. The results indicated that enzymatic pretreatment could boost the hydrogen peroxide bleaching and stabilize its brightness. The optimal conditions were lipase dosage of 10IU/g, pH value of 8, temperature of 35℃ and time of 30min. From the analysis of fiber surface of the pulps after enzymatic pretreatment by XPS, it can be found that lipase could remove some extractives and part of lignin from fiber surface, and result in more carbohydrate on the fiber surface.

关 键 词：脂肪酶 磺化化学机械浆 过氧化氢 白度 返黄 

分 类 号：TS745[轻工技术与工程—制浆造纸工程]