Dhar Manideepa, Das Avijit, Parbat Dibyangana, Manna Uttam
Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India.
Centre for Nanotechnology, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India.
Angew Chem Int Ed Engl. 2022 May 2;61(19):e202116763. doi: 10.1002/anie.202116763. Epub 2022 Mar 14.
The fluorinated-liquid infused amphiphobic slippery interfaces exhibiting superior sliding of the beaded oil/water droplets, often suffer from durability and contamination issues. Here, the ability of 1) hexagonal packing of hydrocarbon sides in a selected "comb-like" polymer and 2) its reversible phase transition at 51 °C was rationally exploited to achieve temperature-assisted rapid (<1 minute) and repetitive (50 times) self-healable amphiphobic solid-slippery coating on both planar and geometrically-complex substrates. The selected "comb-like" polymer was strategically infused in a porous, hydrophilic and thick (≈4.8 μm) polymeric coating. The resultant solid and smooth interface exhibited sliding of beaded droplets of various liquids, including droplets of water, polar (ethanol, 1-propanol, 1-hexanol, DMSO, DMF), and non-polar (decane, dodecane, diiodomethane) organic solvents, edible (vegetable oil), motor, engine (petrol, diesel, kerosene) and crude oils.
注入氟化液体的两疏性光滑界面，虽能使串珠状油/水滴实现出色滑动，但常存在耐久性和污染问题。在此，我们合理利用了以下两点：一是选定的“梳状”聚合物中烃链侧基的六方堆积，二是其在51 °C时的可逆相变，从而在平面和几何形状复杂的基底上实现了温度辅助的快速（<1分钟）且可重复（50次）的自修复两疏性固体光滑涂层。选定的“梳状”聚合物被巧妙地注入到一种多孔、亲水且较厚（≈4.8 μm）的聚合物涂层中。所得的固体且光滑的界面能够使各种液体的串珠状液滴滑动，包括水滴、极性（乙醇、1-丙醇、1-己醇、二甲基亚砜、二甲基甲酰胺）和非极性（癸烷、十二烷、二碘甲烷）有机溶剂液滴、食用（植物油）、发动机（汽油、柴油、煤油）和原油液滴。
