Evaluation of Oil Repellent Effect by Metamaterial Structure

The snail shell has a 200 nm porous structure and oil repellency in water. The nano-porous structure of 200 nm was found to have an oil repellent effect, but the oil repellent behavior on various micro surfaces was not reported, so the oil repellent evaluation of the micro-surface and the nano-surface was performed. The nanosurface showed excellent oil repellency rating, but it was found that the state of oil repellency is different even at the same nanosize. In order to consider the wetting of oil droplets in water, based on surface morphology, the relationship between super water repellency in air and water super water repellency was discussed. These results are useful for designs that add oil repellent technology to the structure. In the near future, oil repelling effect is expected in view of medical use. Therefore, we will promote oil repellent evaluation and production based on the structure.