On the formaldehyde release of wood
On the formaldehyde release of wood
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DOI：
10.1007/s001070050422
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发表时间：
2000-11
期刊：
影响因子：
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通讯作者：
M. Schäfer;E. Roffael
中科院分区：
文献类型：
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作者：
M. Schäfer;E. Roffael
本文论述了木材纤维素、半纤维素和木质素的主要成分以及木材抽出物作为潜在的甲醛来源的作用。木质素似乎比纤维素和半纤维素有更高的排放潜力。此外，结果表明，一方面萃取物释放甲醛，另一方面某些木材萃取物与甲醛反应，从而起到甲醛清除剂的作用。甲醛在低至40摄氏度的温度下从木材中释放出来，温度越高，甲醛的释放量就越大。因此，热机械法制浆极大地提高了甲醛释放量。讨论了不同树种间甲醛释放量的差异，并与其化学成分的差异有关。
The paper addresses the role of the main components of wood cellulose, hemicellulose, and lignin as well as of wood extractives as a potential source of formaldehyde. Lignin seems to have a higher emission potential than cellulose and hemicellulose. Moreover, the results reveal that on the one hand extractives release formaldehyde and on the other hand that certain wood extractives react with formaldehyde and hence act as a formaldehyde scavenger. Formaldehyde emanates from wood at temperatures as low as 40 C. Higher temperatures increase the formaldehyde emission tremendously. Therefore, thermo-mechanical pulping enhances formaldehyde release exorbitantely. Differences in the formaldehyde emission between wood species are discussed and related to differences in their chemical composition.