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| Effects and Mechanisms of Enzymatic Synergy on the Refining Performance of Bleached Eucalyptus Kraft Pulp |
| Received:September 04, 2025 Revised:September 29, 2025 |
| DOI：10.11980/j.issn.0254-508X.2026.02.008 |
| Key Words:enzymatic refining cellulase xylanase refining energy consumption synergistic effect |
| Fund Project:国家重点研发项目“生物造纸技术及产业示范”（2022YFC2105503）。 |
| Author Name | Affiliation | Postcode | | DUAN Linjuan* | School of Cultural Creativity and Tourism, Yuncheng Vocational and Technical University, Yuncheng, Shanxi Province, 044000 | 044000 | | WU Hao | National Key Lab of Bio-based Fiber Materials, Tianjin Key Lab of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457 | 300457 | | LI Zhiqiang | National Key Lab of Bio-based Fiber Materials, Tianjin Key Lab of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457 | 300457 | | LI Qun* | National Key Lab of Bio-based Fiber Materials, Tianjin Key Lab of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457 | 300457 | | ZHANG Fengshan | Shandong Huatai Paper Co., Ltd., Dongying, Shandong Province, 257335 | 257335 | | ZHU Hongwei | Yueyang Forest & Paper Co., Ltd., Yueyang, Hu’nan Province, 430600 | 430600 | | LIU Rongrong* | National Key Lab of Bio-based Fiber Materials, Tianjin Key Lab of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457
Shandong Huatai Paper Co., Ltd., Dongying, Shandong Province, 257335 | 257335 |
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| Abstract:This study used bleached eucalyptus kraft pulp (BEKP) as the raw material to systematically investigate the effects of xylanase， cellulase， and their synergistic effect at different enzyme dosages and refining conditions on fiber structure， refining efficiency， and paper strength. The aim was to elucidate the mechanisms of enzymatic systems and to optimize the refining process. The results showed that xylanase treatment primarily hydrolyzed surface hemicellulose of the fibers， increasing the accessibility of hydroxyl groups on the fiber surface. Consequently， the water retention value (WRV) increased from 172 g/g to 183 g/g after PFI refining， while the tensile and burst strengths of the paper exhibited only minor changes. Low-dose cellulase treatment (5 U/g) significantly increased WRV to 241 g/g by cleaving the amorphous regions of cellulose. Comaring with tne orginal pulp， this treatment also reduced specific refining energy by 29.7%， and increased the tensile index and burst index by 12.6% and 19.1%， respectively. Synergistic enzyme treatment further increased the proportion of C—O and the O/C ratio， while decreasing the C—C fraction. This indicated an additive effect of hemicellulose hydrolysis and cellulose chain cleavage， which promoted fiber fibrillation and swelling. When cellulase was fixed at 5 U/g and xylanase at 125 U/g， comparing with the paper that had not been treated with enzyme， the tensile index and burst index increased by approximately 19.2% and 30.4%， respectively. These improvements were clearly superior to those observed with single-enzyme treatments， validating the positive effect of enzymatic synergy. |
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