Mechanics of Crater-Enabled Soft Dry Adhesives: A Review
Mechanics of Crater-Enabled Soft Dry Adhesives: A Review
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DOI：
10.3389/fmech.2020.601510
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发表时间：
2020-12
期刊：
影响因子：
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通讯作者：
Liu Wang;Kyoungjin Ha;G. Rodin;K. Liechti;N. Lu
中科院分区：
文献类型：
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作者：
Liu Wang;Kyoungjin Ha;G. Rodin;K. Liechti;N. Lu
干附着力是由物理作用而不是化学作用决定的。这些可能包括范德华力和静电力、摩擦力和吸力。软干胶粘剂可以反复附着和脱离表面，可用于许多令人兴奋的应用，包括可逆胶带，机器人脚垫和夹具，以及生物集成电子产品。到目前为止，研究最多的软干胶粘剂是受壁虎启发的微柱阵列，但它们的可重复使用性有限，并且在水下的附着力较弱。最近，凹坑表面作为微柱阵列的替代品出现，因为它们具有许多优点，如可调的压敏粘附性、高水下粘附强度和良好的可重复使用性。本文综述了作者最近在坑洞表面力学表征方面的工作，包括实验、建模和计算组件。利用描述陨石坑内空气或液体的基本关系，我们研究了材料特性、陨石坑形状、空气与液体环境和表面模式的影响。本文还指出了当前研究方法存在的一些问题和局限性，并对未来的研究方向进行了展望。
Dry adhesion is governed by physical rather than chemical interactions. Those may include van der Waals and electrostatic forces, friction, and suction. Soft dry adhesives, which can be repeatedly attached to and detached from surfaces, can be useful for many exciting applications including reversible tapes, robotic footpads and grippers, and bio-integrated electronics. So far, the most studied Soft dry adhesives are gecko-inspired micro-pillar arrays, but they suffer from limited reusability and weak adhesion underwater. Recently cratered surfaces emerged as an alternative to micro-pillar arrays, as they exhibit many advantageous properties, such as tunable pressure-sensitive adhesion, high underwater adhesive strength, and good reusability. This review summarizes recent work of the authors on mechanical characterization of cratered surfaces, which combines experimental, modeling, and computational components. Using fundamental relationships describing air or liquid inside the crater, we examine the effects of material properties, crater shapes, air vs. liquid ambient environments, and surface patterns. We also identify some unresolved issues and limitations of the current approach, and provide an outlook for future research directions.