Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany.
Science. 2012 Jan 6;335(6064):67-70. doi: 10.1126/science.1207115. Epub 2011 Dec 1.
Coating is an essential step in adjusting the surface properties of materials. Superhydrophobic coatings with contact angles greater than 150° and roll-off angles below 10° for water have been developed, based on low-energy surfaces and roughness on the nano- and micrometer scales. However, these surfaces are still wetted by organic liquids such as surfactant-based solutions, alcohols, or alkanes. Coatings that are simultaneously superhydrophobic and superoleophobic are rare. We designed an easily fabricated, transparent, and oil-rebounding superamphiphobic coating. A porous deposit of candle soot was coated with a 25-nanometer-thick silica shell. The black coating became transparent after calcination at 600°C. After silanization, the coating was superamphiphobic and remained so even after its top layer was damaged by sand impingement.
涂层是调整材料表面性能的重要步骤。基于低能表面和纳米级到微米级的粗糙度，已经开发出了具有大于 150°接触角和小于 10°水滚落角的超疏水涂层。然而，这些表面仍然会被有机液体润湿，如基于表面活性剂的溶液、醇或烷烃。同时具有超疏水性和超疏油性的涂层很少见。我们设计了一种易于制备、透明且具有回油能力的超双疏涂层。蜡烛烟灰的多孔沉积物涂有 25 纳米厚的二氧化硅壳。在 600°C 煅烧后，黑色涂层变得透明。经过硅烷化处理后，涂层具有超双疏性，即使其顶层被沙粒冲击损坏，它仍然保持超双疏性。
