Low‐Friction, Superhydrophobic, and Shape‐Memory Vulcanized Rubber Microspiked Structures
Low‐Friction, Superhydrophobic, and Shape‐Memory Vulcanized Rubber Microspiked Structures
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DOI：
10.1002/adem.201901226
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发表时间：
2020-02
影响因子：
3.6
通讯作者：
S. Uemura;Y. Matsuo;T. Okamatsu;T. Arita;M. Shimomura;Y. Hirai
中科院分区：
文献类型：
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作者：
S. Uemura;Y. Matsuo;T. Okamatsu;T. Arita;M. Shimomura;Y. Hirai
采用微细硅模，通过简单的热压工艺制备了多功能硫化橡胶微钉结构。通过简单计算接触面积和摩擦力之间的关系，证实了硫化橡胶尖顶结构通过将载荷集中在尖顶来降低摩擦系数。摩擦系数还可以通过硫化橡胶的伸长率和摩擦方向来控制，这是由于钉状结构的排列方式从六边形变为各向异性，而不会引起钉状结构的变形。硫化橡胶钉状结构还具有超疏水和形状记忆等额外功能。超疏水性是通过精细的微钉结构实现的，形状记忆效应是通过硫化橡胶的性能产生的。因此，折叠的尖峰结构可以通过热处理恢复到其原始状态，并重新产生超疏水性。这些结果表明，表面微结构可以为这些材料增加更多的功能。这种多功能硫化橡胶所需的制备方法简单，为创造优质产品提供了巨大的可能性，因为自然界中有许多这样的结构设计的例子。
Multifunctional vulcanized rubber microspiked structures are prepared by a simple hot‐press process with a fine microstructured Si mold. The vulcanized rubber spiked structures reduce the friction coefficient by concentration of the load on the top of the spikes, as confirmed by a simple calculation of the relationship between the contact area and the friction force. The friction coefficient can also be controlled by elongation of the vulcanized rubber and the rubbing direction due to the changes in the arrangement of the spiked structures from hexagonal to anisotropic linear patterns without deformation of the spike structures. The vulcanized rubber spiked structures show additional functions such as superhydrophobicity and shape memory. The superhydrophobicity is realized by the fine microspiked structures, and the shape‐memory effect is generated by the vulcanized rubber properties. Therefore, folded spiked structures can be recovered to their original state by heat treatment, and superhydrophobicity regenerates. These results indicate that the surface microstructures can add further functionality to these materials. The simplicity of the preparation method required for this multifunctional vulcanized rubber offers great possibilities for the creation of superior products as there are many examples of such structural designs in nature.