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Switchable Wettability and Adhesion of Micro/Nanostructured Elastomer Surface via Electric Field for Dynamic Liquid Droplet Manipulation
Advanced Science ( IF 14.3 ) Pub Date : 2020-08-02 , DOI: 10.1002/advs.202000772 Yan Li 1 , Jinrong Li 2 , Liwu Liu 3 , Yufeng Yan 1 , Qiuya Zhang 1 , Na Zhang 1 , Linlin He 1 , Yanju Liu 3 , Xiaofang Zhang 4 , Dongliang Tian 1, 5 , Jinsong Leng 2 , Lei Jiang 1, 5, 6
Advanced Science ( IF 14.3 ) Pub Date : 2020-08-02 , DOI: 10.1002/advs.202000772 Yan Li 1 , Jinrong Li 2 , Liwu Liu 3 , Yufeng Yan 1 , Qiuya Zhang 1 , Na Zhang 1 , Linlin He 1 , Yanju Liu 3 , Xiaofang Zhang 4 , Dongliang Tian 1, 5 , Jinsong Leng 2 , Lei Jiang 1, 5, 6
Affiliation
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Dynamic control of liquid wetting behavior on smart surfaces has attracted considerable concern owing to their important applications in directional motion, confined wetting and selective separation. Despite much progress in this regard, there still remains challenges in dynamic liquid droplet manipulation with fast response, no loss and anti‐contamination. Herein, a strategy to achieve dynamic droplet manipulation and transportation on the electric field adaptive superhydrophobic elastomer surface is demonstrated. The superhydrophobic elastomer surface is fabricated by combining the micro/nanostructured clusters of hydrophobic TiO2 nanoparticles with the elastomer film, on which the micro/nanostructure can be dynamically and reversibly tuned by electric field due to the electric field adaptive deformation of elastomer film. Accordingly, fast and reversible transition of wetting state between Cassie state and Wenzel state and tunable adhesion on the surface via electric field induced morphology transformation can be obtained. Moreover, the motion states of the surface droplets can be controlled dynamically and precisely, such as jumping and pinning, catching and releasing, and controllable liquid transfer without loss and contamination. Thus this work would open the avenue for dynamic liquid manipulation and transportation, and gear up the broad application prospects in liquid transfer, selective separation, anti‐fog, anti‐ice, microfluidics devices, etc.
中文翻译：
通过电场可切换微/纳米结构弹性体表面的润湿性和粘附力，用于动态液滴操纵
智能表面上液体润湿行为的动态控制因其在定向运动、有限润湿和选择性分离方面的重要应用而引起了相当大的关注。尽管在这方面取得了很大进展，但快速响应、无损失和抗污染的动态液滴操控仍然存在挑战。在此，展示了一种在电场自适应超疏水弹性体表面上实现动态液滴操纵和传输的策略。超疏水弹性体表面是通过将疏水性TiO 2纳米粒子的微纳结构团簇与弹性体薄膜相结合而制备的，由于弹性体薄膜的电场自适应变形，其微纳结构可以通过电场动态地、可逆地调节。因此，可以获得Cassie态和Wenzel态之间润湿态的快速可逆转变以及通过电场诱导的形态转变在表面上可调的粘附力。而且，可以动态、精确地控制表面液滴的运动状态，如跳跃和钉扎、捕捉和释放，以及可控的液体转移，无损失和污染。因此，这项工作将为动态液体操纵和运输开辟途径，并在液体传输、选择性分离、防雾、防冰、微流控装置等方面具有广阔的应用前景。
更新日期：2020-09-23
中文翻译：
通过电场可切换微/纳米结构弹性体表面的润湿性和粘附力，用于动态液滴操纵
智能表面上液体润湿行为的动态控制因其在定向运动、有限润湿和选择性分离方面的重要应用而引起了相当大的关注。尽管在这方面取得了很大进展，但快速响应、无损失和抗污染的动态液滴操控仍然存在挑战。在此，展示了一种在电场自适应超疏水弹性体表面上实现动态液滴操纵和传输的策略。超疏水弹性体表面是通过将疏水性TiO 2纳米粒子的微纳结构团簇与弹性体薄膜相结合而制备的，由于弹性体薄膜的电场自适应变形，其微纳结构可以通过电场动态地、可逆地调节。因此，可以获得Cassie态和Wenzel态之间润湿态的快速可逆转变以及通过电场诱导的形态转变在表面上可调的粘附力。而且，可以动态、精确地控制表面液滴的运动状态，如跳跃和钉扎、捕捉和释放，以及可控的液体转移，无损失和污染。因此，这项工作将为动态液体操纵和运输开辟途径，并在液体传输、选择性分离、防雾、防冰、微流控装置等方面具有广阔的应用前景。
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