| 邓中浩,褚美雪,马迪,李丹丹,赵可欣,李群,路福平,黎明.复合酶制剂用于杨木化学浆漂白及其对纸浆性能的影响[J].中国造纸,2026,45(9):59-66 |
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| 复合酶制剂用于杨木化学浆漂白及其对纸浆性能的影响 |
| Bleaching of Poplar Chemical Pulp with Compound Enzyme and Its Effect on Pulp Properties |
| 收稿日期：2026-03-09 修订日期：2026-04-08 |
| DOI：10.11980/j.issn.0254-508X.2026.09.008 |
| 关键词: 杨木硫酸盐浆 漆酶 漂白 白度 复合酶制剂 |
| Key Words:poplar kraft pulp laccase bleaching brightness compound enzyme |
| 基金项目:国家重点研发计划2022YFC2105500国家自然科学基金2227832132072161国家重点研发计划（2022YFC2105500）；国家自然科学基金（22278321，32072161）。 |
| 作者 | 单位 | 邮编 | | 邓中浩* | 1天津科技大学生物工程学院,工业发酵微生物教育部重点实验室,天津,300457 | 300457 | | 褚美雪 | 1天津科技大学生物工程学院,工业发酵微生物教育部重点实验室,天津,300457 | 300457 | | 马迪 | 1天津科技大学生物工程学院,工业发酵微生物教育部重点实验室,天津,300457 | 300457 | | 李丹丹 | 1天津科技大学生物工程学院,工业发酵微生物教育部重点实验室,天津,300457 | 300457 | | 赵可欣 | 1天津科技大学生物工程学院,工业发酵微生物教育部重点实验室,天津,300457 | 300457 | | 李群* | 2天津科技大学轻工科学与工程学院,天津市制浆造纸重点实验室,天津,300457 | 300457 | | 路福平* | 1天津科技大学生物工程学院,工业发酵微生物教育部重点实验室,天津,300457 | 300457 | | 黎明* | 1天津科技大学生物工程学院,工业发酵微生物教育部重点实验室,天津,300457 | 300457 |
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| 摘要:本研究以杨木硫酸盐浆为原料，开发了一种适用于全无氯漂白工艺的助漂复合酶制剂。浆料经氧脱木质素后，在50 ℃、pH值=7.0条件下进行120 min酶预处理，再经两段H2O2漂白得到漂白浆。采用正交实验优化漆酶、木聚糖酶和脂肪酶的配比，并对所得漂白浆性能进行表征。结果表明，复合酶制剂最佳用量组合为漆酶25 U/g绝干浆、木聚糖酶15 U/g绝干浆、脂肪酶15 U/g绝干浆；与仅经两段H2O2漂白的对照组（PP组）相比，两段复合酶预处理结合两段H2O2漂白的酶处理组（MPMP组）白度提高了2.1个百分点，达到88.9%，且漂白过程无有机氯产生；纸张抗张指数、耐破指数、撕裂指数分别提高18.2%、16.0%、48.1%；纸浆纤维的化学组分及表面形态分析表明，酶预处理有利于木聚糖和木质素的溶出，从而提高漂白剂的漂白效果并增加纤维间结合力。 |
| Abstract:In this study， poplar kraft pulp was used as raw material to develop a compound enzyme preparation for chlorine-free bleaching. After oxygen delignification of pulp， The pulp was pretreated with enzyme at 50 ℃ and pH value of 7.0 for 120 min， and then bleached with two stages of H2O2. the dosage of laccase， xylanase and lipase was optimized by orthogonal experiment. The bleached pulp was characterized. The results showed that the optimal dosage combination of compound enzyme preparation was laccase 25 U/g absolute dry pulp， xylanase 15 U/g absolute dry pulp， lipase 15 U/g absolute dry pulp； Compared with the control group (PP group) which only underwent two-stage H2O2 bleaching， the brightness of the two-stage composite enzyme pretreatment combined with two-stage H2O2 bleaching enzyme treatment group (MPMP group) reached 88.9% ， increased by 2.1 percentage points， and no organic chlorine was produced in the bleaching process. The tensile index， burst index and tear index of paper were increased by 18.2%， 16.0% and 48.1%， respectively. The analysis of the chemical composition and surface morphology of pulp fibers showed that enzyme treatment was beneficial to the dissolution of xylan and lignin， further improving the bleaching effect of bleaching agent and increasing the binding ability between fibers. |
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