Removal of residual lignin of ethanol-based organosolv pulp by an alkali extraction process
Removal of residual lignin of ethanol-based organosolv pulp by an alkali extraction process
复制标题
碱提取工艺去除乙醇基有机溶剂浆中残留木质素
DOI：
10.1002/app.26622
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发表时间：
2007-10-05
影响因子：
3
通讯作者：
Li, Kecheng
中科院分区：
文献类型：
--
作者：
Zhang, Meiyun;Xu, Yongjian;Li, Kecheng
有机溶剂纸浆通常具有高卡伯值。本研究研究了漂白前的碱提取方法，以降低有机溶剂纸浆的卡伯值。用1%NaOH溶液提取卡伯值为58.2的乙醇麦草浆。结果表明，乙醇浆纤维表面存在大量木质素颗粒。碱提1 min后，乙醇浆的卡伯值降低了60%，达到22.2，纤维表面木质素颗粒的数量和尺寸均明显减小。与进一步的乙醇洗涤/提取相比，碱提取在去除木质素方面更加有效。 X射线光电子能谱结果表明，碱提取后纤维表面残留有一层薄薄的木质素，但这并没有降低内部结合强度。 (c) 2007 年 Wiley 期刊公司。
Organosolv pulps usually have high kappa number. This research investigated an alkaline extraction method prior to bleaching for reducing the kappa number of organosolv pulp. Ethanol wheat straw pulp with a kappa number of 58.2 was extracted with 1% NaOH solution. The results show that the ethanol pulp has a large amount of lignin particles on the fiber surface. After 1 min alkali extraction, the kappa number of the ethanol pulp is reduced by 60%, to 22.2, and both the number and the size of the lignin particles on the fiber surface are significantly reduced. In comparison with a further ethanol washing/extraction, the alkali extraction is much more effective in terms of lignin removal. X-ray photoelectron spectroscopy results show that a thin layer of lignin remained on the fiber surface after alkli extraction, but this did not reduce the internal bond strength. (c) 2007 Wiley Periodicals, Inc.