中文摘要：

以微、纳米二氧化硅和硅油（羟基硅油和含氢硅油）为主要原料,经高压均质制备了二氧化硅/硅油复合乳液（CSE）,稀释后与催化剂混合,经真空-加压浸渍后联合180℃热处理改性东北青杨边材,构建疏水表面。测试并分析了改性材表面的接触角、滚动角、表面粗糙度,并采用场发射扫描电子显微镜-X射线能量色散谱仪和原子力显微镜观察改性材表面的微观形态并对细胞壁中的元素分布进行了检测。结果表明：1）2.7%CSE/热改性材的3个切面上的水分接触角和滚动角均达到了超疏水性的要求,随着CSE质量分数的进一步增加,改性材表面的疏水性呈递减趋势;2）与高质量分数的复合硅乳液相比,2.7%CSE/热改性材的3个切面的各项粗糙度与荷叶表面粗糙度最接近,单独依靠木材表面或硅树脂膜自身的粗糙度均无法模拟出与荷叶表面相似的粗糙度;3）改性材表面生成了和荷叶表面乳突相类似的新纳米、微米两级复合乳突;4）复合硅乳液中的Si元素渗入了木材细胞壁,且在木材表面有大量沉积。

英文摘要：

Silica and silicone oil complex silicon emulsion （short as complex silicon emulsion, CSE）was composed of silica （micron- and nano-scaled silica） and silicone oil （hydroxy silicone oil and hydrogen silicone oil） as raw materials and formulated in high pressure homogenization. After dilution to different concentration levels, CSE was mixed with catalyzer and used to treat poplar （Populus cathayana） sapwood samples in vacuum-pressure process and then post-treated with 180℃ thermal process to fabricate superhydrophobic wood surface. Water contact angle （WCA） , water sliding angle （WSA） , surface roughness （SR） of modified samples were measured and analyzed, and the microscopic morphology and element distribution in wood cell wall were investigated by field emission scanning electronic microscope coupled with energy-dispersed X-ray analyzer （FESEM-EDXA） and atomic force microscope （AFM）. The results indicated that： 1） WCAs and WSAs on the three section surfaces of samples treated with 2.7% CSE combined with thermal modification meet the requirements for superhydrophobic surface. However, the hydrophobicity of modified wood surfaces decreased with CSE concentration; 2） compared with other high CSE concentrations, SR values on the three section surfaces of 2.7% CSE/thermally modified wood showed the most proximity to that of lotus leaf. Depending on the roughness of the wood surface or the silicone film, the surface roughness of the lotus leaf could not be simulated; 3 ） two-level compound mastoideus consisting of both micro- and nano-scaled protrusions emerged on the surface of modified wood, which can mimic the structure of lotus leaf; d） silicon element distributed in wood cell wall, with much deposited on the surface of wood.