| 林小河,郭雪芳,陈礼辉,胡会超,李建国.纤维素酶处理对深度预水解硫酸盐竹溶解浆性能的影响[J].中国造纸,2025,(8):112-117 |
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| 纤维素酶处理对深度预水解硫酸盐竹溶解浆性能的影响 |
| Effect of Cellulase Treatment on the Performance of Deep Prehydrolysis Sulfate Bamboo Dissolving Pulp |
| 收稿日期:2025-02-14 修订日期:2025-03-06 |
| DOI:10.11980/j.issn.0254-508X.2025.08.014 |
| 关键词: 竹溶解浆 深度预水解 纤维素酶 Fock反应性能 |
| Key Words:bamboo dissolving pulp deep prehydrolysis cellulase Fock reactirity |
| 基金项目:国家重点研发计划(2023YFD2201903);企业委托项目(技检2020-01)。 |
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| 摘要:本研究以竹材为原料制备溶解浆,探究了深度预水解和纤维素酶处理对竹溶解浆性能的影响。结果表明,延长预水解时间可以降低竹溶解浆中半纤维素含量,同时提高Fock反应性能,但过长的预水解时间会轻微降低竹溶解浆α-纤维素含量;采用纤维素酶处理可以断裂纤维素分子链,“刻蚀”溶解浆纤维,改善纤维形态和微纳结构,溶解浆的聚合度和α-纤维素含量呈降低趋势,而Fock反应性能大幅度提升增加;与135 min预水解、蒸煮漂白制备溶解浆相比,竹材经过185 min深度预水解、蒸煮漂白制备溶解浆再经0.25 mg/g纤维素酶处理,可以提高竹溶解浆综合性能指标,其聚合度从905降低到442(降低了51.2%),α-纤维素含量从97%降低到92%(降低了5个百分点),Fock反应性能从24%提高到75%(提升了51个百分点)。 |
| 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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