Abstract Protection against wetting is a central issue in the finishing of wood, since water promotes degradation and reduced service life of the material. Ideally, wood finishes should provide efficient protection from water while at the same time preserving the overall bio-based character of the material. In order to meet this challenge, we propose a facile way to achieve superhydrophobic coatings on wood by using environmentally benign and even food-safe materials only. Spruce wood samples were dip-coated in a mixture of tung oil and natural beeswax, followed by the deposition of micronized sodium chloride particles. After a washing procedure, EDX confirmed that no sodium chloride remained at the surface. SEM-imaging illustrated the successful formation of a micro-structured topography endowing the surface with water repellence as indicated by stable static water contact angles above 160°. It is thus demonstrated that fully bio-based superhydrophobic wood coatings may be achieved using templating with water-soluble salt.

中文翻译：

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由植物油和天然蜡制成的木材超疏水涂层

摘要 防止润湿是木材涂饰中的一个核心问题，因为水会促进材料的降解并缩短其使用寿命。理想情况下，木饰面应提供有效的防水保护，同时保持材料的整体生物基特性。为了应对这一挑战，我们提出了一种简单的方法，通过仅使用对环境无害甚至食品安全的材料在木材上实现超疏水涂层。云杉木样品浸涂在桐油和天然蜂蜡的混合物中，然后沉积微粉化氯化钠颗粒。洗涤程序后，EDX 确认没有氯化钠残留在表面。SEM 成像表明成功形成了微结构形貌，使表面具有防水性，如稳定的静态水接触角超过 160° 所示。因此证明，使用水溶性盐模板化可以实现完全基于生物的超疏水木器涂料。