含氟低表面能修饰的超双疏涂层制备及其性能

目的 制备具有良好机械稳定性和化学稳定性的超双疏涂层材料。方法 采用三种尺寸的微纳米二氧化硅和环氧树脂制成微纳米凹凸结构，在此基础上修饰低表面能的氟碳单分子层，制备超疏水超疏油涂层。分别利用扫描电子显微镜、原子力显微镜和X射线光电子能谱，对涂层表面的形貌和成分进行分析。通过接触角测量仪测试涂层表面的接触角和滚动角。经过砂纸摩擦、耐化学腐蚀和耐溶剂性能测试，分别评价超双疏涂层材料的耐磨损性和化学稳定性。结果 涂层对水、乙二醇和花生油等表面张力在34~72 mN/m范围内的液体具有超疏特性。砂纸上机械摩擦5次循环后，对花生油的接触角保持在155?以上，滚动角保持在5?以下；摩擦10次循环后，对水和乙二醇的接触角均保持在154°以上，滚动角保持在2.5?以下。涂层经pH=14的碱溶液和正庚烷浸泡，168 h后，对水和乙二醇仍保持超疏性能；96 h后，与花生油接触角在153?以上，滚动角在10?~20?之间。结论 该涂层具有良好的超疏水超疏油性能及良好的耐磨损性和化学稳定性，在工业领域具有较大的潜在应用价值。

Preparation and Properties of Fluorinated Low Surface Energy Modified Superamphiphobic Coatings

The work aims to prepare the superamphiphobic coatings with good mechanical and chemical stabilities. Three sizes of micro-/nanometer silicas and epoxy resin were constructed to the concave-convex micro-/nanometer rough structure. After the monolayer of low-surface-energy ?uoride-chains was modified on concave-convex micro-/nanometer rough structure, the superamphiphobic coating was prepared. FESEM, AFM and XPS were used to analyze the morphology and composition of coating surface. The contact angle and roll angle of coating surface were tested by the contact angle meter. Then, abrasive paper friction test, chemical resistance test and solvent resistance test were carried out to evaluate the wear resistance and chemical stability of the superamphiphobic coating. The coating had outstanding superhydrophobic properties to liquids with different surface tension in the range of 34~72 mN/m, such as water, ethanediol and peanut oil. After 5 cycles of mechanical friction on abrasive paper, the contact angle (CA) of peanut oil was above 155? and the rolling angle (RA) was below 5?. As for ethylene glycol and water, CAs and RAs were above 154? and below 2.5? respectively after 10 cycles of mechanical friction. In addition, the coating remained superhydrophobic to water and ethylene glycol after being immersed in an alkali solution (pH=14) and n-heptane for 168 hours. After 96 hours, the contact angle of the coating with peanut oil was above 153?, and the rolling angle was between 10? to 20?. The coating has great potential application value in the industrial field for its excellent superamphiphobic properties and good mechanical and chemical stability.