Penetration and distribution of paraffin wax in wood of loblolly pine and Scots pine studied by time domain NMR spectroscopy
Penetration and distribution of paraffin wax in wood of loblolly pine and Scots pine studied by time domain NMR spectroscopy
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DOI：
10.1515/hf-2017-0030
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发表时间：
2017-09
期刊：
影响因子：
2.4
通讯作者：
Wang Wang-Wang;Yiheng Huang;Jinzhen Cao;Yuan Zhu
中科院分区：
文献类型：
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作者：
Wang Wang-Wang;Yiheng Huang;Jinzhen Cao;Yuan Zhu
摘要石蜡乳液浸渍木材是一种常用的环保型木材防水处理方法。以火炬松（Pinus taeda）和樟子松（Pinus sylvesteris）为试材，采用不同固含量和粒径的PWE溶液浸渍，利用时域核磁共振（TD-NMR）技术研究了浸渍参数对蜡渗透和分布的影响。TD-NMR测定的含蜡量与木材增重率之间存在良好的线性相关性（R2=0.981）。根据载蜡量和分布数据，火炬松具有比苏格兰松更好的渗透性。随着固体含量和颗粒尺寸的减小，PWE在两种物种中的渗透性增加。测定了木材表面不同深度处的水接触角，其结果与TD-NMR分析发现的蜡分布相一致。
Abstract Impregnation of wood with paraffin wax emulsion (PWE) is a common eco-friendly approach for improving water repellency. In this study, loblolly pine (Pinus taeda) and Scots pine (Pinus sylvesteris) samples were impregnated with PWEs with different solid contents and particle sizes, and the influence of the impregnation parameters on wax penetration and distribution in treated wood was elucidated by time domain nuclear magnetic resonance (TD-NMR). A good linear correlation (R2=0.981) between wax content determined by TD-NMR and weight percent gain (WPG) of the impregnated wood was established. According to wax loading and distribution data, loblolly pine has a much better permeability than Scots pine. With decreasing solid content and particle size, the penetration of PWE increases in both species. The water contact angles (CA) on the surface at different depths of wood were also determined, and the CA results were consistent with the wax distribution found by the TD-NMR analysis.