Wet Adhesion of Soft Curved Interfaces With Micro Pattern
Wet Adhesion of Soft Curved Interfaces With Micro Pattern
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DOI：
10.1109/lra.2021.3067277
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发表时间：
2021-07-01
影响因子：
5.2
通讯作者：
Ho, Van Anh
中科院分区：
文献类型：
--
作者：
Nguyen, Van Pho;Ho, Van Anh
先前的研究表明，模仿树蛙脚趾结构的扁平微图案软垫在潮湿环境中抓握物体时增加了粘附力。然而，软界面可能会改变形状以适应弯曲的环境，因此，有必要澄清在这种情况下的湿粘附力学。在这封信中，我们提出了一种方法，用于评估的粘附能力的软弯曲界面的特定微图案在凹接触界面。重点研究了不同接触条件下接触界面法向湿粘附力的变化规律。用于该分析的微图案软垫具有3600个单元，每个单元具有85 μ m × 85 μ m，由15 μ m宽× 44 μ m深的凹槽分隔。该微图案软垫可以变形以适合凹面。我们还比较了这种微图案软垫与没有微图案的类似软垫在垫和基底之间的界面处的粘附能力。结果表明，微图案化垫的表面使界面接触力提高了1-2倍。该方法可用于评估使用具有图案表面的软垫抓取具有曲面的物体时的湿粘附力。
Previous research reveals that a flat micropatterned-soft pad, which mimics the structure of tree-frog's toes, increases adhesion when gripping an object in a wet environment. However, soft interfaces may change shape to adapt to curved environments, therefore, it is necessary to clarify the mechanics of wet adhesion in such cases. In this letter, we propose a method for evaluation of the adhesive ability of a soft curved interface with a specific micropattern in a concave contact interface. We focused on wet adhesion force in the normal direction on the contact interface in different contact scenarios. The micropattern soft pad used in this analysis has 3600 cells, each has 85 mu m x 85 mu m separated by grooves 15 mu m in width x44 mu m in depth. This micropattern soft pad may deform to fit a concave surface. We also compared this micropattern soft pad with a similar soft pad without a micropattern in term of adhesion ability at the interface between the pad and the substrate. Obtained results have good agreement with the estimations, demonstrating that the surface of the micro-patterned pad enhanced contact force at the interface approximately 1-2 times than the non-parttern surface. This approach can be utilized in evaluation of wet adhesion in grasping objects with curved surface using soft pads with patterned surfaces.