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本论文用AU-MTPE90酶和木聚糖酶对搓磨分丝后的马尾松木片进行预处理,并研究酶用量对纸张性能和磨浆能耗的影响。结果表明:经生物酶处理后的纸张强度得到明显提高,松厚度略有增加,其中,AU-MTPE90酶预处理后抗张指数可提高40.57%,撕裂指数可提高68.51%,松厚度可提高15.81%;木聚糖酶预处理后抗张指数可提高12.49%,撕裂指数可提高76.12%,松厚度可提高9.26%。同时,木聚糖酶预处理马尾松浆料后的纤维束含量降低显著,说明利用生物酶预处理浆料,可以提高原料的利用率,降低机械制浆的能耗。另一方面,木聚糖酶用量对纸张动态接触角的影响较大,在0.2s时,400转下酶用量为162u/g的浆料接触角即可达到未经酶处理的600转的效果,说明生物酶预处理浆可以减少磨浆转数,从而降低磨浆能耗。
In this thesis, the pine wood chips after rubbing and grinding were pretreated with AU-MTPE90 enzyme and xylanase, and the effects of enzyme dosage on paper performance and refining energy consumption were studied. The results showed that the strength of the paper treated with enzyme increased obviously and the bulkiness increased slightly. The tensile index of AU-MTPE90 increased by 40.57%, the tear index increased by 68.51% and the bulkiness increased 15.81%. After pretreated by xylanase, the tensile index increased by 12.49%, the tear index increased by 76.12% and the bulkiness increased by 9.26%. Meanwhile, the xylanase pretreatment masson pine pulp significantly reduced the fiber content, indicating that the use of enzyme pretreatment of the slurry, can improve the utilization of raw materials and reduce energy consumption of mechanical pulping. On the other hand, the amount of xylanase has a great influence on the dynamic contact angle of paper. At 0.2s, the contact angle of slurry with enzyme dosage of 162u / g at 400rpm can reach the effect of 600 without enzyme treatment , Indicating that the biological enzyme pretreatment slurry can reduce the refining rotation, thereby reducing the refining energy consumption.