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| Effect of Cellulase Treatment on the Performance of Deep Prehydrolysis Sulfate Bamboo Dissolving Pulp |
| Received:February 14, 2025 Revised:March 06, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.08.014 |
| Key Words:bamboo dissolving pulp deep prehydrolysis cellulase Fock reactirity |
| Fund Project:国家重点研发计划（2023YFD2201903）；企业委托项目（技检2020-01）。 |
| Author Name | Affiliation | Postcode | | LIN Xiaohe* | Fujian Qingshan Paper Co., Ltd., Sanming, Fujian Province, 365500 | 365500 | | GUO Xuefang | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | CHEN Lihui | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | HU Huichao | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | LI Jianguo | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 |
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| Abstract:This study employed the bamboo as the raw materials to manufacture the dissolving pulp， and analyzed the effects of deep prehydrolysis and cellulase treatments on the performance of bamboo dissolving pulp. The results showed that extending the time of prehydrolysis treatment decreased the hemicellulose content while improved the Fock reactivity. However， the overlong prehydrolysis treatment leaded to the low content of α-cellulose in the bamboo dissolving pulp. Cellulase treatment cut the cellulose molecular chain and “etched” the dissolving pulp fiber， and thus modified the fiber morphology and micro-nano structure. As a result， cellulase treatment reduced the degree of polymerization and α-cellulose content and enhanced the Fock reactivity. Compared with the sample with 135 min prehydrolysis and cooling and bleaching treatment， the deep prehydrolysis-sulfate bamboo dissolving pulp with prehydrolysis (185 min)， cooking and bleaching and 0.25 mg/g cellulase treatments， had the decreased degree of polymerization from 905 to 442 (with a reduction by 51.2%)， reduced α-cellulose content from 97% to 92% (with a reduction by 5 percentage points)，and increased Fock reactivity from 24% to 75% (with an increase by 51 percentage points). |
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