纤维素内切酶预处理对浆料打浆性能的影响  

The effect of endo-cellulase pretreatment on pulp beatability

作　　者：刘祝兰[1,2] 姚华[1,2] 曹云峰[1,2] 赵林果[2] LIU Zhu-lan;YAO Hua;CAO Yun-feng;ZHAO Lin-guo(Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Jiangsu Provincial Innovation Center for Forestry Resource Utilization,Nanjing Forestry University,Nanjing 210037,Jiangsu,China)

机构地区：[1]南京林业大学江苏省制浆造纸科学与技术重点实验室,南京210037 [2]南京林业大学江苏省林业资源高效加工利用协同创新中心,南京210037

出　　处：《中华纸业》2018年第24期44-50,共7页China Pulp & Paper Industry

基　　金：国家自然科学基金项目(31670591;31600473);江苏省自然科学基金项目(BK20160928);江苏省高校自然科学研究重大项目(13KJA220004);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：通过单因素变量分析纤维素内切酶预处理桉木浆和苇浆的效果,优选酶预处理最佳工艺。结果表明,纤维素内切酶预处理桉木浆的最佳工艺条件为:酶用量3.0I U/g,预处理时间2h,温度50℃,pH值7.5;预处理苇浆的最佳工艺条件为:酶用量1.0I U/g,预处理时间1h,温度50℃,p H值7.5。与原浆相比,在最佳工艺条件下,酶预处理桉木浆打浆度提高7.4°SR,苇浆打浆度降低3.1°SR。酶预处理过程中,桉木浆和苇浆中细小组分含量降低,纤维平均长度增加,桉木浆和苇浆纤维得以软化。经PFI磨浆后纤维表面分丝帚化程度加强,打浆效果显著改善,成纸抗张强度和耐破强度提高。The endo-cellulase pretreating for reed pulp and eucalyptus pulp were optimized with the method of univariate analysis.It concluded that the optimum conditions for eucalyptus pulp pretreating are:enzyme dosage 3 IU/g,pretreatment time 2h,temperature 50℃ and pH 7.5.For reed pulp,the optimum condition are:enzyme dosage 1 IU/g,pretreatment time 1h,temperature 50℃ and pH 7.5.Compared with the raw pulp,the beating degree of endo-cellulase pretreated Eucalyptus pulp increased by 7.4°SR,and reed pulp reduced by 3.1°SR under the optimum pretreatment conditions.The endo-cellulase pretreatment can help to reduce the fines content,increase average fiber length,and soften Eucalyptus and reed fiber,which induce higher fibrillation extent during PFI refining.And paper strength as well as tensile strength can also be improved.

关 键 词：纤维素内切酶 酶预处理 桉木浆 苇浆 

分 类 号：TS752[轻工技术与工程—制浆造纸工程] TS743.14