摘要
在传统盘磨机械浆(RMP)的基础上,通过前期对杨木进行化学预浸渍处理、加入纤维素酶进行生物-化学预处理、生物-化学预处理前增加盘磨机械预处理来探究纤维素酶的影响,对比了RMP、化学机械浆(CMP)、生物化学浆(BMP)和机械生物化学浆(M-BMP)的磨浆能耗、纤维形态以及机械强度和光学性能。实验证实:纤维素酶的加入可以润胀纤维并对其进行可控水解,磨浆能耗从2550 kW·h/t降低至2106 kW·h/t,节约磨浆能耗13%以上;生物-化学预处理最高可将纤维宽度从21.70μm提高至23.20μm,将浆料中细小纤维比例从18.89%增加到24.51%;X射线衍射(XRD)和红外分析证明酶处理可以降解无定形区纤维素,使得纤维物料的相对结晶度上升;浆料耐破指数从0.34 kPa·m^(2)/g提升至0.46 kPa·m^(2)/g,抗张指数从9.22 N·m/g提升至12.66 N·m/g,较BMP分别提升35.29%和37.31%。此外,通过白度与不透明度的分析,证实了纤维素酶对高得率浆光学性能的影响在可控范围内。
Based on the traditional refiner mechanical pulp(RMP),the influence of cellulase was explored by conducting chemical pre-impregnation treatment on poplar wood in the early stage,adding cellulase for biochemical pretreatment,and adding mechanical pretreatment with disc grinding before biochemical pretreatment.The grinding energy consumption,fiber morphology,mechanical strength and optical properties of RMP,chemical mechanical pulp(CMP),biochemical pulp(BMP)and mechanical biochemical pulp(M-BMP)were compared.It was found that the addition of cellulase could swell and hydrolyze the fiber,reduce the energy consumption of grinding from^(2)550 kW·h/t to 2106 kW·h/t,save more than 13% of the energy consumption of grinding,the biological-chemical pretreatment could increase the fiber width from^(2)1.70μm to 23.20μm and the proportion of fine fibers in the pulp from 18.89% to 24.51%.XRD and infrared analysis proved that the enzymatic treatment could degrade amorphous cellulose,resulting in an increase in the relative crystallinity of the fiber material,and increase the burst index of the pulp from 0.34 kPa·m^(2)/g to 0.46 kPa·m^(2)/g.The tensile index increases from 9.22 N·m/g to 12.66 N·m/g,which is 35.29% and 37.31% higher than that of the refiner mechanical pulp,respectively.The characterization of whiteness and opacity proved that the cellulase could influence the optical properties of the high-yield pulp in a controllable range.
作者
耿博
梁龙
韩善明
吴珽
沈葵忠
房桂干
GENG Bo;LIANG Long;HAN Shanming;WU Ting;SHEN Kuizhong;FANG Guigan(Institute of Chemical Industry of Forestry Products,CAF/Key Lab.of Biomass Energy and Material,Jiangsu Province/KeyLab.of Chemical Engineering of Forest Products,National Forestry and Grassland Administration/National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass,Nanjing 210042,China;Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,China;Shandong Huatai Paper Co.,Ltd.,Dongying 257335,China)
出处
《林产化学与工业》
北大核心
2025年第4期97-104,共8页
Chemistry and Industry of Forest Products
基金
国家重点研发计划资助项目(2022YFC2105503)
中央财政林业科技推广示范资金项目(苏[2023]TG07)。
关键词
纤维素酶
磨浆能耗
纤维形态
耐破指数
抗张指数
cellulase
energy consumption of grinding
fiber morphology
burst index
tensile index
