【作者】 葛培锦；

【导师】 尤纪雪； 陈嘉川；

【作者基本信息】 南京林业大学 ， 林产化学加工工程， 2006， 博士

【摘要】 发展麦草烧碱法化学机械浆（ACMP）是有效利用农业剩余物，克服造纸工业原料短缺的重要途径。生物化学机械浆是减少制浆过程废水污染的有效方法。本文利用热水预处理、木聚糖酶预处理和热水-木聚糖酶预处理的方法，对麦草烧碱法化学机械制浆过程中，热水和木聚糖酶预处理的作用效果以及麦草木聚糖酶-烧碱法化学机械浆（H-X-ACMP）木聚糖酶预处理H₂O₂漂白进行了研究。 主要得到了如下结果： 1．麦草热水预处理的适宜温度是90℃。麦草H-ACMP与ACMP相比较，磨浆后可以提高浆料的抗张指数和撕裂指数分别约7％和5％。 2．麦草木聚糖酶预处理的适宜条件是：酶用量15IU／g、时间90-120min。麦草X-ACMP与ACMP相比较，浆料的抗张指数和撕裂指数分别提高约40％和16％。热水处理后的木聚糖酶预处理，可以进一步提高这一作用，麦草H-X-ACMP与ACMP相比较，浆料的抗张指数和撕裂指数分别提高约75％和19.5％，对于同样的物理指标，可以降低烧碱用量约30％。 3．木聚糖酶预处理可较好地改善H-X-ACMP过氧化氢漂白的效率，在木聚糖酶用量12IU／g、时间120min这一适宜条件下进行预处理，用5％H₂O₂漂白，比对照浆白度增加5.5％ISO个单位。H-X-ACMP经XP₅P₅a多段漂白可以获得白度达74.6％ISO的麦草生物化机浆。 4．热水和木聚糖酶预处理，可增加化机浆的R50、R102和R203组分。这是H-X-ACMP具有较高机械强度的主要原因。麦草H-X-ACMP是生产高强度瓦楞纸板的良好原料。 5．麦草二氧六环木素的红外光谱、2D-HMQC NMR光谱等技术分析结果表明：麦草和麦草H-X-ACMP经木聚糖酶预处理，羟基和甲氧基数量增加，在脱去聚戊糖的同时，对浆料起到“活化”作用，为后续化学药品处理创造了有利条件。更多还原

【Abstract】 Developing wheat straw soda Chemi-mechanical pulp （ACMP） is an important method of the utilization of agricultural residues and overcoming the shortage of the raw material in the pulp and paper industry. Bio-chemimechanical pulping is an efficienct way of reducing waste water pollution in pulping. The function of hot water pretreatment, xylanase pretreatment and hot water-xylanase pretreatment prior to soda treatment during chemi-mechanical pulping of wheat straw along with xylanase pretreatment prior to hydrogen peroxide bleaching of wheat straw xylanase soda chemi-mechanical pulp （H-X-ACMP） were investigated in this thesis.It mainly achieves the following results:1. The suitable temperature of pretreating wheat straw with hot water was 90°C. Compared to the ACMP, H-ACMP respectively increases 7% and 5% in tensile index and tear index of chemi-mechanical pulp.2.The suitable conditions of pretreatment wheat straw with xylanase were the enzyme dosage 15 IU/g （on oven dry wheat straw and xylanase activity）, pretreatment time 90-120min.Compared to the ACMP, X-ACMP respectively increase 40% and 16% in tensile index, tear index of chemi-mechanical pulp. Pretreatment with xylanase after hot water treatment of wheat straw, it was more effective than pretreatment with hot water and xylanase, Compared to the ACMP, H-X-ACMP respectively increase 75%和 19.5% in tensile index, tear index of chemi-mechanical pulp.For the same physical strength ,it could decrease the 30% of the soda consumption.3. Pretreatment with xylanase prior to H₂O₂ bleaching during bleaching led to effectiveness of H₂O₂ bleaching improving, and brightness of bleached pulp increasing 5.5%ISO（compared to the control）. The suitable conditions of xylanase pretreatment were xylanase dosage of 12 IU/g（ oven dry wheat straw）, the time of 120min. Furthermore, the pulp could be bleached to 74.6% ISO brightness level by using XP₅a P₅a bleaching sequences.4. Compared to the ACMP, H-X-ACMP the R50, R102、 R203 fractionations fiber could be increased by hot water and xylanase pretreatment of wheat straw, and softness and fibrillation of fiber could also be improved, it was mainly the reason for H-X-ACMP possess upper physical strength. H-X-ACMP could be sued to the paperboard of higher strength.5.FTIR and 2D-HMQC NMR spectroscopy of wheat straw dioxane lignin analysis results showed: pretreatment with xylanase led to -OH and -OCH₃ increasing, wheat straw and soda chemi-mechanical pulp of wheat straw were activated during breaking off covalent bond and xylan from the lignin-carbohydrate-eomplexes （LCC） was partially degraded and removed in enzyme stage by enzyme attacks lignin-carbohydrates linkages such as ether or glycoside linkages. Xylanase pretreatment created advantage condition that wheat straw and soda chemi-mechanical pulp of wheat straw were treatmented by the subseguently chemicals.更多还原