Here we present a simple route to improve the stiffness of polydimethylsiloxane (PDMS) gecko-inspired micropillar with high friction by incorporation of ZrO₂ particles. Young’s modulus of PDMS composite pillar is increased due to the presence of three-dimensional network between fillers and free PDMS segments, and the composite pillar with ZrO₂ nanoparticles has the largest Young’s modulus due to the high specific surface area of nano-size fillers. The patterned composite pillars with various diameters of ZrO₂ particles exhibit high friction force, which is attributed to the strong interconnection between hydroxyl groups on ZrO₂ surface and silanol units in PDMS matrix. This particle-embedded elastomer micropillar delivers a universal strategy to increase Young’s modulus with high friction performance in gecko-inspired adhesive.

在这里，我们提出了一种简单的方法，通过掺入ZrO ₂颗粒来提高聚二甲基硅氧烷（PDMS）壁虎启发的微柱的刚度，并具有高摩擦力。由于填料和自由PDMS链段之间存在三维网络，PDMS复合柱的杨氏模量增加，而ZrO ₂纳米颗粒的复合柱由于纳米级填料的高比表面积而具有最大的杨氏模量。具有各种直径的ZrO ₂颗粒的图案化复合柱表现出高摩擦力，这归因于ZrO ₂上羟基之间的强互连PDMS基质中的表面和硅烷醇单元。这种嵌入粒子的弹性体微柱提供了一种通用的策略，可以在壁虎启发的粘合剂中以高摩擦性能提高杨氏模量。