碱-酶协同预处理优化桉木高得率浆能耗-强度机制研究

邢君梅; 梁龙; 沈葵忠; 朱海峰; 王锦栎; 陈嘉珞; 吴珽; 房桂干

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Investigation into the Energy Consumption-Strength Mechanism of Alkali-Enzyme Synergistic Pretreatment for Optimizing Eucalyptus High-yield Pulp

Received:June 30, 2025 Revised:August 22, 2025

DOI：10.11981/j.issn.1000-6842.2025.04.112

Key Words:high-yield pulp;alkali-enzyme synergistic pretreatment;paper properties;refining energy consumption;multi-scale characterization

Fund Project:国家重点研发计划（2022YFC2105503）；中央财政林业科技推广示范资金项目（苏［2024］TG12）。

Author Name	Affiliation	Postcode
XING Junmei^*	Jiangsu Key Lab of Biomass Energy and Material， Institute of Chemical Industry of Forest Products， Chinese Academy of Forestry， Nanjing， Jiangsu Province， 210042 Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037	210037
LIANG Long	Jiangsu Key Lab of Biomass Energy and Material， Institute of Chemical Industry of Forest Products， Chinese Academy of Forestry， Nanjing， Jiangsu Province， 210042 Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037	210037
SHEN Kuizhong^*	Jiangsu Key Lab of Biomass Energy and Material， Institute of Chemical Industry of Forest Products， Chinese Academy of Forestry， Nanjing， Jiangsu Province， 210042 Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037	210037
ZHU Haifeng	Jiangsu Key Lab of Biomass Energy and Material， Institute of Chemical Industry of Forest Products， Chinese Academy of Forestry， Nanjing， Jiangsu Province， 210042 Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037	210037
WANG Jinli	Jiangsu Key Lab of Biomass Energy and Material， Institute of Chemical Industry of Forest Products， Chinese Academy of Forestry， Nanjing， Jiangsu Province， 210042 Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037	210037
CHEN Jialuo	Jiangsu Key Lab of Biomass Energy and Material， Institute of Chemical Industry of Forest Products， Chinese Academy of Forestry， Nanjing， Jiangsu Province， 210042 Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037	210037
WU Ting^*	Jiangsu Key Lab of Biomass Energy and Material， Institute of Chemical Industry of Forest Products， Chinese Academy of Forestry， Nanjing， Jiangsu Province， 210042	210042
FANG Guigan	Jiangsu Key Lab of Biomass Energy and Material， Institute of Chemical Industry of Forest Products， Chinese Academy of Forestry， Nanjing， Jiangsu Province， 210042	210042

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Abstract:

This study systematically investigated the mechanism by which alkali-enzyme synergistic pretreatment affected the properties and dissociation energy consumption of eucalyptus CTMP. The experimental results indicated that under optimal alkali-enzyme synergistic pretreatment conditions （NaOH dosage of 6%， cellulase dosage of 8 FPU/g）， pulp properties were significantly improved， and refining energy consumption was substantially reduced. When the pulp freeness reached 150 mL， the energy consumption of the alkali-enzyme synergistic pretreatment was 1 104.01 kWh/t， significantly lower than that of the single alkali pretreatment （1 498.68 kWh/t）， and 32.2% lower compared to mechanical refining （1 627.81 kWh/t）. Meanwhile， the tensile index （24.4 N·m/g） and bursting index （1.29 kPa·m²/g） of the paper formed via alkali-enzyme synergistic pretreatment increased by approximately 32% and 46%， respectively， compared to the paper formed via mechanical refining （18.5 N·m/g and 0.883 kPa·m²/g）. However， the strength properties were slightly reduced compared to the paper formed via single alkali pretreatment. The mechanistic studies revealed that the reduction in refining energy consumption with alkali-enzyme synergistic pretreatment was primarily attributed to the dissolution of lignin and hemicellulose by alkali treatment， which disrupted the lignin-carbohydrate complex structure and caused fiber swelling. The subsequent enzymatic treatment further dissolved part of the cellulose and hemicellulose， increased fiber porosity， and loosened the fiber structure， thereby facilitating fiber separation. The slight decline in the strength properties of the paper formed via alkali-enzyme synergistic pretreatment was related to the dissolution of carbohydrates on the fiber surface during the enzymatic treatment process.

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