超疏水滤纸的制备与应用

Preparation and Application of Super-hydrophobic Filter Paper

对SiO2纳米粒子进行硅烷化改性,再将其修饰到滤纸上,制备出静态水接触角>150°的超疏水滤纸,对制备条件进行了优化。用热重分析及扫描电子显微镜对超疏水滤纸表征后发现,二氧化硅纳米粒子在滤纸纤维表面形成一层包裹层,即纳米级粗糙结构,这种结构对滤纸的疏水性具有关键作用。对滤纸的油水分离性能进行了研究,发现其对非均相体系和高粘度油水混合物具有很好的分离效果。

Super-hydrophobic filter papers were prepared by using SiO2 nano-particles midified by silylating reagent. The water contact angle on the filter papers was higher than 150°. Thermogravimetry and scanning electron microscope were used to characterize the filter paper. The results showed that SiO2 nano-partiele layer was formed on the micro-fibers of filter paper. The combined nano- and micro-structure produced the super- hydrophobie property of the filter paper. The oil-water separation ability of the paper was also investigated, high oil-water separation efficiencies of the paper, especially for high-viscosity mixtures, were confirmed.