摘要
研究了木聚糖酶预处理对麦草的化学组成及其化学浆纤维长度的影响。结果表明,木聚糖酶酶处理后原料的热水抽出物和1%NaOH抽出物含量增加,乙醇-苯酚(苯-醇)抽出物含量有所降低,酶处理对原料中酸不溶木质素含量影响很小,但聚戊糖含量降低。延长酶处理时间,对酶处理最终结果影响不大。酶处理后的稀碱抽提可以有效地降低原料中的木质素和聚戊糖含量。与对照样品相比,酶处理后麦草化学浆的纤维长度有所增加。上述结果从理论上解释了酶法制浆过程中出现的一些现象。
Wheat straw was pretreated by crude xylanase prior to chemical pulping, and effects of enzyme treatment on chemical composition of wheat straw and fiber length of its chemical pulp were investigated. The results show that contents of hot-water extractive and 1% NaOH extractive were increased, and alcohol-benzene extractive content was lowered by xylanase treatment. Xylanase treatment had a slight influence on Klasson lignin content, but lowered pentosan content. The extraction with low consistency sodium hydroxide solution after enzymatic treatment led to the decreases of Klasson lignin and pentosan contents effectively. Compared to the control, chemical pulp from xylanase-pretreated wheat straw has a longer length of fiber.
出处
《林产化学与工业》
EI
CAS
CSCD
2006年第2期127-130,共4页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(30400338)
关键词
木聚糖酶处理
碱抽提
纤维长度
麦草
xylanase treatment
alkali extraction
fiber length
wheat straw
