木材表面耐久性超疏水涂层的制备及性能研究

Preparation and Properties of Durable Superhydrophobic Coatings for Wood Surfaces

木材表面疏水处理是提升木材使用寿命的一种有效途径。研究采用喷涂法在木材表面构建十八烷基三甲氧基硅烷-无机颗粒-环氧树脂复合超疏水涂层,采用扫描电子显微镜、超景深三维显微系统、傅立叶变换红外光谱和接触角测试等方法对涂层表面进行分析和表征,对比不同种类、粒径无机颗粒(二氧化钛、二氧化硅)和环氧树脂预聚物用量的涂层样品性能,优化涂层制备工艺。结果表明,优化工艺制备的涂层在经历20个周期的砂纸(1000目)磨损或20次胶带剥离后水接触角仍大于150°,超疏水性能稳定,涂层的大部分微纳结构得以保留,表现出良好的机械耐久性。

To improve the service life of wood,the hydrophobic treatment is an effective method.This study employed a spray coating technique to construct a superhydrophobic coating on the wood surface,consisting of octadecyltrimethoxysilane-inorganic-particles-epoxy resin composites.The coating preparation process was optimized by comparing the hydrophobicity of different types and sizes of inorganic particles(titanium dioxide,silicon dioxide)and varied dosages of epoxy resin prepolymer.The results indicated that the optimized coatings maintained a water contact angle greater than 150°even after 20 cycles of sandpaper(1000 grit)abrasion or 20 rounds of adhesive tape peeling.The superhydrophobic performance of the coatings remained stable,with most of the micro and nanostructures preserved,demonstrating excellent mechanical durability.