Abstract The effect of wollastonite on the wetting properties of welded Scots pine-joints was studied using the multicycle Wilhelmy plate method and by observation of the chemical composition of the welded joints. Welding pine with wollastonite for 5 s resulted in a decrease in the water uptake and the swelling, and an increase in the contact angle of the welded joint compared to welded wood without wollastonite. High-performance liquid chromatography and gas chromatography/mass spectrometry showed the presence of dehydration products such as furfural, 5-hydroxymethylfurfural, and levoglucosan in methanol extracts from welded joints of specimens welded with and without wollastonite. Phenols were also found by analysis using the Folin-Ciocalteu method and High-performance liquid chromatography. The importance of such compounds in relation to the wetting properties of the welded joint is discussed.

中文翻译：

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通过 Wilhelmy 方法研究的焊接木接头的润湿性：第 2 部分。硅灰石添加剂的影响

摘要 采用多循环Wilhelmy 板法并通过观察焊接接头的化学成分，研究了硅灰石对焊接苏格兰松木接头润湿性能的影响。与没有硅灰石的焊接木材相比，用硅灰石焊接松木 5 s 导致吸水率和膨胀率降低，焊接接头的接触角增加。高效液相色谱和气相色谱/质谱分析表明，在使用和不使用硅灰石焊接的试样的焊接接头的甲醇提取物中存在脱水产物，如糠醛、5-羟甲基糠醛和左旋葡聚糖。还通过使用 Folin-Ciocalteu 方法和高效液相色谱法的分析发现了酚类。