Stretchable, Adhesion-Tunable Dry Adhesive by Surface Wrinkling
Stretchable, Adhesion-Tunable Dry Adhesive by Surface Wrinkling
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DOI：
10.1021/la904290g
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发表时间：
2010-02-16
期刊：
影响因子：
3.9
通讯作者：
Suh, Kahp Y.
中科院分区：
文献类型：
--
作者：
Jeong, Hoon Eui;Kwak, Moon Kyu;Suh, Kahp Y.
我们介绍了一个简单而强大的方法，制造一个可拉伸的，粘附力可调的干胶结合复制成型和表面抛光。通过利用厚度为1分钟的具有内置微柱的薄的、起皱的聚二甲基硅氧烷（PDMS）片材，实现了正常和剪切粘附的主动、动态控制。对于完全延伸的（应变的）PDMS片材（预应变类似于3%），可以获得相对强的法向（类似于10.8 N/cm（2））和剪切粘附力（类似于14.7 N/cm（2）），而一旦释放预应变（预应变类似于0.5%），力可以迅速减小到接近零。此外，耐久性测试表明，在正常方向和剪切方向的粘合强度保持超过100个周期的连接和分离。
We introduce a simple yet robust method of fabricating a stretchable, adhesion-tunable dry adhesive by combining replica molding and surface wrinkling. By utilizing a thin, wrinkled polydimethyl siloxane (PDMS) sheet with a thickness of 1 min with built-in micropillars, active, dynamic control of normal and shear adhesion was achieved. Relatively strong normal (similar to 10.8 N/cm(2)) and shear adhesion (similar to 14.7 N/cm(2)) forces could be obtained for a fully extended (strained) PDMS sheet (prestrain of similar to 3%), whereas the forces could be rapidly reduced to nearly zero once the prestrain was released (prestrain of similar to 0.5%). Moreover, durability tests demonstrated that the adhesion strength in both the normal and shear directions was maintained over more than 100 cycles of attachment and detachment.