| 邢君梅,梁龙,沈葵忠,朱海峰,王锦栎,陈嘉珞,吴珽,房桂干.碱-酶协同预处理优化桉木高得率浆能耗-强度机制研究[J].中国造纸学报,2025,40(4):112-121 |
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| 碱-酶协同预处理优化桉木高得率浆能耗-强度机制研究 |
| Investigation into the Energy Consumption-Strength Mechanism of Alkali-Enzyme Synergistic Pretreatment for Optimizing Eucalyptus High-yield Pulp |
| 投稿时间：2025-06-30 修订日期：2025-08-22 |
| DOI：10.11981/j.issn.1000-6842.2025.04.112 |
| 中文关键词: 高得率浆 碱-酶协同预处理 纸张性能 磨浆能耗 多尺度表征 |
| Key Words:high-yield pulp alkali-enzyme synergistic pretreatment paper properties refining energy consumption multi-scale characterization |
| 基金项目: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）。 |
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| 中文摘要: |
| 本研究系统探讨了碱-酶协同预处理对桉木高得率浆性能与解离能耗的影响机制。结果表明，在较优的碱-酶协同预处理条件（NaOH用量6%、纤维素酶用量8 FPU/g）下，浆料性能显著改善，磨浆能耗大幅降低。当浆料游离度达到150 mL时，碱-酶协同预处理能耗为1 104.01 kWh/t，显著低于单一碱预处理（1 498.68 kWh/t），相比机械磨浆（1 627.81 kWh/t）节能32.2%；同时，碱-酶协同预处理下纸张的抗张指数（24.4 N·m/g）和耐破指数（1.29 kPa·m2/g）分别较机械磨浆纸张（18.5 N·m/g和0.883 kPa·m2/g）提高了约32%和46%，但与单一碱预处理下纸张相比，强度性能略有降低。机制研究表明，碱-酶协同预处理的磨浆能耗降低主要归因于碱处理溶出木质素与半纤维素，破坏木质素-碳水化合物复合体结构，同时纤维润胀；随后酶处理进一步溶出部分纤维素与半纤维素，增大纤维孔隙率，疏松纤维结构，从而更易于纤维分离。碱-酶协同预处理下纸张的强度性能轻微下降，则与酶处理过程中纤维表面碳水化合物的溶出有关。 |
| 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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