麦草烧碱AQ浆木聚糖酶和活性氧漂白研究.pdfVIP

file:///E|/qk/zgzz/zgzz99/zgzz9904/990407.htm 中国造纸 CHINA PULP PAPER 1999年　第18卷　第4期 Vol.18 No.4 1999 麦草烧碱-AQ浆木聚糖酶与活性氧漂白研究 于伟东　陈中豪　余惠生 摘　要　木聚糖酶与活性氧协同处理麦草烧碱-AQ浆，在达到相当的脱木素能力和白度 提高幅度时，纸浆的粘度要高于O P漂后的纸浆。活性氧处理麦草烧碱-AQ浆，其残余 木素脱除达到37%，白度提高10.2%(SBD)；而酶用于活化氧X处理前可以大幅度提高脱 木素率，当酶用量为2U/g时，X处理后纸浆中的残余木素脱除在45%以上，白度较没有 酶处理的提高6.3%(SBD)。木聚糖酶与活性氧协同处理再经H O 漂白后的纸浆性质与 2 2 O PP漂后的纸浆相比，在白度相当的情况下，纸浆的硬度相差不大，而纸浆的粘度高于 O PP漂后的纸浆。 关键词　木聚糖酶　活性氧　麦草烧碱-AQ浆　氧脱木素 Bleaching of Wheat Straw Kraft-AQ Pulp with Xylanase and Active Oxygen Yu Weidong　Chen Zhonghao (South China University of Technology,Guangzhou,510641 ） Yu Huisheng (Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou,510650) ABSTRACT　Comparing with the oxygen delignified wheat straw pulp,wheat straw pulp bleached with xylanase(En)and active oxygen(X)had the same brightness and kappa number but higher viscosity.37% residual lignin of the pulp was removed and 10 points brightness was increased when the pulp was bleached with active oxygen.45% residual lignin removal and 6.3 points extra brightness increase were achieved when xylanase was used before active oxygen treatment.Hardness of the pulp bleached with En-X-P sequence was the same as the pulp bleached with Op-P sequence,viscosity of the former was higher than the later. KEYWORDS　xylanase,acitve oxygen,oxygen delignification,wheat straw kraft-AQ pulp 　　麦草原料中含有较多的杂细胞，可漂性较差。麦草原料中含有较多半纤维素，有 利于木聚糖酶的处理，文章结合木聚糖酶与活性氧协同处理麦草烧碱-AQ浆，探索其可 行性和优越性。 1　原料、试验方法与检测 file:///E|/qk/zgzz/zgzz99/zgzz9904/990407.htm（第 1／5 页）2010-3-23 18:32:42 file:///E|/qk/zgzz/zgzz99/zgzz9904/990407.htm 1.1　原料取自咸阳造纸厂，具体性质见表1 表1　麦草烧碱