酶处理对粉丹竹SCMP过氧化氢漂白浆性质的影响  

Effect of Enzyme Pretreatment on the Properties of Bamboo(Bambusa Chung Ⅱ) SCMP Bleached by H_2O_2

作　　者：李兵云[1] 詹怀宇[1] 梁辰[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

出　　处：《中国造纸学报》2010年第1期9-13,共5页Transactions of China Pulp and Paper

摘　　要：探讨了脂肪酶和果胶酶预处理对粉丹竹SCMP过氧化氢漂白浆的白度、白度稳定性、打浆度及强度性质的影响。对纸浆进行了苯-醇抽出物含量的测定和X射线光电子能谱（XPS）的分析。实验结果表明,两种酶预处理都可以使漂后纸浆的白度提高3-4个百分点,PC值降低33%-34%,打浆度分别提高4.0°SR、2.5°SR,裂断长、耐破指数和撕裂指数等也提高了4%-9%。粉丹竹SCMP苯-醇抽出物含量达1.92%,经过脂肪酶和果胶酶预处理后纸浆苯-醇抽出物含量分别降低了0.40个百分点和0.56个百分点。由XPS分析可知,在脂肪酶或果胶酶预处理过程中,纸浆抽出物的去除主要发生在纤维表面,使纤维表面暴露出更多的碳水化合物和木素,有利于后续过氧化氢漂白。This paper mainly discussed the effect of lipase or pectinase pretreatment on the brightness and brightness stability as well as beating degree and strength properties of H2O2 bleached Bambusa Chung II sulphonated chemimechanical pulp（SCMP）.The content of benzene/ethanol extractives was also evaluated.In addition,the properties of the fiber surface were analyzed using X-ray photoelectron spectroscopy.From the result,after lipase and pectinase pretreatment,the final brightness increased by 3%-4%ISO,PC number decreased by 33%-34%,beating degree increased by 2.5-4.0°SR and strength properties also increased by 4%-9%.The content of benzene/ethanol extractives of Bambusa Chung II SCMP after lipase and pectinase pretreatment decreased by 0.40% and 0.56% respectively.From XPS analysis,the removal of extractive took place on the fiber surface during enzyme pretreatment,which was of benefit to hydrogen peroxide bleaching.

关 键 词：磺化化学机械浆 过氧化氢漂白 脂肪酶处理 果胶酶处理 

分 类 号：Q55[生物学—生物化学] R745[医药卫生—神经病学与精神病学]