This work proposes an experimental approach to study the scratch resistance of green wood under the effect of polyethylene glycol (PEG) impregnation. To this end, small-scale green spruce samples are stabilized against water by using the technique of PEG impregnation to prevent water to seep out of the wood during experimental tests. Scratches are performed in the radial-longitudinal and tangential-longitudinal planes of cubic wood samples by using two different indenter tips under constant and progressive normal loads. Scratch testing has previously been used mainly to characterize the abrasion resistance of coatings. Since PEG simulates the swelling effect of water in wood, this paper shows that the scratch tests on PEG-impregnated green wood can be adopted as a simple technique to understand the scratch resistance in swollen wood and the related mechanisms. The scratch test results, quantified in terms of frictional forces and permanent residual depths, reveal that the scratch resistance of wood samples depends on their PEG concentration and density, as well as on the indenter tip size and material, and on the normal force and direction during scratching. Due to the lack of literature on the scratch tests of wood, the results presented in this paper will serve as a scientific reference for future studies on the scratch resistance of untreated or treated dry wood and other wood-based products.

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PEG 浸渍生木的抗划伤性：一种评价膨胀木材特性的方法

这项工作提出了一种实验方法来研究在聚乙二醇 (PEG) 浸渍作用下生木的抗划伤性。为此，小规模的绿色云杉样品通过使用 PEG 浸渍技术来防止水在实验测试期间从木材中渗出，从而使水稳定。在恒定和渐进法向载荷下，使用两个不同的压头尖端在立方体木材样品的径向-纵向和切向-纵向平面上进行划痕。划痕测试以前主要用于表征涂层的耐磨性。由于 PEG 模拟水在木材中的溶胀作用，本文表明，对 PEG 浸渍的生木进行划痕测试可以作为一种简单的技术来了解膨胀木材的耐划伤性及其相关机制。根据摩擦力和永久残留深度量化的划痕测试结果表明，木材样品的耐划伤性取决于它们的 PEG 浓度和密度，以及压头尖端尺寸和材料，以及法向力和方向在抓挠过程中。由于缺乏木材划痕试验的文献，本文提出的结果将作为未来研究未经处理或处理过的干木材和其他木制品的抗划伤性的科学参考。表明木材样品的抗划伤性取决于它们的 PEG 浓度和密度，以及压头尖端的尺寸和材料，以及划痕过程中的法向力和方向。由于缺乏木材划痕试验的文献，本文提出的结果将作为未来研究未经处理或处理过的干木材和其他木制品的抗划伤性的科学参考。表明木材样品的抗划伤性取决于它们的 PEG 浓度和密度，以及压头尖端的尺寸和材料，以及划痕过程中的法向力和方向。由于缺乏木材划痕试验的文献，本文提出的结果将作为未来研究未经处理或处理过的干木材和其他木制品的抗划伤性的科学参考。