超声波协同木聚糖酶处理对速生杨CTMP浆性能的影响

Influence of Treatment of Xylanase Combined with Ultrasonic Wave-Assisted on the Properties of CTMP of Fast-Growing Poplar

对速生杨CTMP浆进行超声波协同木聚糖酶处理,探讨超声波协同木聚糖酶处理对CTMP浆的滤水性能、纤维形态以及物理性能和光学性能的影响。结果表明:酶用量10 U·g^(-1)、超声处理时间10 min时处理效果较好,与单一木聚糖酶处理30 min相比,超声波协同木聚糖酶处理后纸浆的打浆度降低32.9%,撕裂指数提高15.7%;与原CTMP浆相比,超声波协同木聚糖酶处理后纸浆的打浆度降低59.6%,撕裂指数提高36.3%。超声波的辅助处理还可以弥补单一木聚糖酶处理后纸浆抗张强度降低的缺陷,使纸浆的抗张指数恢复到原CTMP浆的水平;酶用量为10 U·g^(-1)时,超声波协同木聚糖酶处理10 min后纸浆的细小纤维量与单一木聚糖酶处理30 min相比降低了19.3%,与原CTMP浆相比则降低了47.2%。

Influence of treatment of single xylanase and ultrasonic wave-assisted xylanase on the drainability, fiber morphology, physical and optical properties of chemi-thermo-mechanical-pulp （CTMP） of fast-growing poplar were studied. Results showed that ultrasonic wave-assisted xylanase gave good results at enzyme dosage of 10 U·g-1 for 10 min. Beating degree decreased 32.9% and 59.6%, tearing index increased 15.7% and 36.3%, compared to the treatment with single xylanase at enzyme dosage of 10 U·g-1 for 30 rain and untreated pulp, respectively. And ultrasonic wave-assisted xylanase treatment can make tensile strength recover to the level of untreated pulp. The fines of pulp treated by ultrasonic wave-assisted xylanase for 10 min declined 19.3% and 47.2% compared to the pulp treated by single xylanase for 30 rain and untreated, respectively.