Study on multiprocessing bleaching of paper pulp with microwave radiation

LI Jianying; ZHAO Yanqiao; DENG Yu; WANG Wenzhong

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Study on multiprocessing bleaching of paper pulp with microwave radiation

更新时间：2023-03-30

- Study on multiprocessing bleaching of paper pulp with microwave radiation
- Journal of Radiation Research and Radiation Processing Vol. 28, Issue 4, Pages: 233-238(2010)
- 作者机构：
  
  1.天津商业大学生物技术与食品科学学院天津市食品生物技术重点实验室　天津　300134
  2.天津科技大学材料科学与化学工程学院　天津　300457
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LI Jianying, ZHAO Yanqiao, DENG Yu, et al. Study on multiprocessing bleaching of paper pulp with microwave radiation. [J]. Journal of Radiation Research and Radiation Processing 28(4):233-238(2010)
DOI：

LI Jianying, ZHAO Yanqiao, DENG Yu, et al. Study on multiprocessing bleaching of paper pulp with microwave radiation. [J]. Journal of Radiation Research and Radiation Processing 28(4):233-238(2010) DOI：

摘要

采用正交试验方法对纸浆多段漂白工艺中NaOH用量、辐射功率、碱处理时间及漂白工艺组合等因素进行了优化，并用红外光谱和纤维分析法对微波辐射纸浆漂白机理进行了研究。多段漂白的最佳工艺条件是：一段H,2,O,2,漂白，微波辐射功率240 W，处理时间2.5 min，H,2,O,2,用量5%，NaOH用量4%；二段NaOH碱处理，微波辐射功率200 W，处理时间1 min，NaOH用量3.5%；三段NaClO漂白，微波辐射功率240 W，处理时间2.5 min，NaClO用量4.2%，NaOH用量1%。在该工艺条件下，纸浆白度达78%ISO以上。红外光谱检测发现反应后木素的结构骨架大体上不起变化。纤维分析测定结果发现纸浆纤维形态基本上没有发生变化。

Abstract

The experiment conditions such as NaOH dosage, microwave radiation power, NaOH process time and bleaching processes assembling in multiprocessing bleaching of paper pulp were optimized by using the method of orthogonal test. The mechanism of straw pulp bleached by microwave radiation was studied by infrared spectroscopy (IR) and fibre analysis. The best conditions for multiprocessing bleaching of paper pulp could be as following that firstly, H,2,O,2, bleaching, microwave power was 240 W, process time was 2.5min, H,2,O,2, dosage was 5%, NaOH dosage was 4%; secondly, NaOH processing, microwave power was 200 W, process time was 1min, NaOH dosage was 3.5%; thirdly, NaClO bleaching, microwave power was 240 W, process time was 2.5 min, NaClO dosage was 4.2%, NaOH dosage was 1%. In optimal process, the whiteness of paper pulp could reach more than 78%ISO. IR results proved that the configuration of the lignin was almost the same as before reaction. The fiber analysis indicated that the form of the pulp fiber did not vary compared with that before reaction.

关键词

纸浆多段漂白优化微波辐射NaOH碱处理

Keywords

Paper pulpMultiprocessing bleachingOptimizationMicrowave radiationNaOH processing

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