Elasto-capillary adhesion: Effect of deformability on adhesion strength and detachment
Elasto-capillary adhesion: Effect of deformability on adhesion strength and detachment
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DOI：
10.1103/physrevfluids.4.033601
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发表时间：
2019-03-18
影响因子：
2.7
通讯作者：
Vella, Dominic
中科院分区：
文献类型：
--
作者：
Butler, Matthew;Box, Finn;Vella, Dominic
我们研究了可变形毛细管粘合剂中毛细管力和变形之间的相互作用：夹紧的张力膜通过液滴的表面张力粘附到刚性基材上。我们发现，与刚性板之间的毛细管粘附力相比，这种弹性毛细管粘合剂的平衡粘附力显着增强。特别是，当膜充分变形以接触基材时，平衡粘附力要大几个数量级。然而，从动态角度来看，充满液体的凹坑的形成会减慢这种接触方法，并且意味着只有在粘附力保持最短时间的情况下才能实现稳定的附着。包含可变膜张力（作为改变可变形性的一种手段）可以对系统进行额外的控制，从而可以探索新的分离策略。
We study the interaction between capillary forces and deformation in the context of a deformable capillary adhesive: a clamped, tense membrane is adhered to a rigid substrate by the surface tension of a liquid droplet. We find that the equilibrium adhesive force for this elasto-capillary adhesive is significantly enhanced in comparison to the capillary adhesion between rigid plates. In particular, the equilibrium adhesion force is orders of magnitude greater when the membrane is sufficiently deformed to contact the substrate. From a dynamic perspective, however, the formation of a fluid-filled dimple slows this approach to contact and means that stable attachment is only achieved if adhesion is maintained for a minimum time. The inclusion of a variable membrane tension (as a means of modifying the deformability) gives additional control over the system, allowing new detachment strategies to be explored.