聚二甲基硅氧烷
材料科学
粘附
壁虎
胶粘剂
树蛙
复合材料
模数
纳米技术
图层(电子)
生态学
生物
作者
Liu Quan,Di Tan,Fandong Meng,Biao Yang,Zhekun Shi,Xin Wang,Qian Li,Chang Nie,Sheng Liu,Longjian Xue
出处
期刊:Small
[Wiley]
日期:2020-12-28
卷期号:17 (4)
被引量:36
标识
DOI:10.1002/smll.202005493
摘要
Abstract It has long been demonstrated the gecko‐inspired micropillar array with T‐shape tips possesses the best adhesion performance of a given material. The further enhancement of the adhesion performances of T‐shape micropillars can offer redundant adhesion to compensate for the inevitable improper contacts. Here, the array of T‐shape polydimethylsiloxane (PDMS) micropillars is incorporated with gradient dispersed calcium carbonate nanoparticles in the micropillar stalk, termed as T‐shape gradient micropillars (TG), possessing the modulus gradient with stiff tip and soft root. The gradient modulus in TG facilitates the contact formation and regulates the stress at the detaching interface, resulting in a 4.6 times adhesion and 2.4 times friction as compared with the pure PDMS T‐shape micropillar arrays. The study here provides a new design strategy for the super‐strong structured dry adhesives.
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