Chen Sangqiu, Dai Qingwen, Yang Xiaolong, Liu Jiongjie, Huang Wei, Wang Xiaolei
National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Institute for Nano- and Microfluidics, Technische Universität Darmstadt, Darmstadt 64287, Germany.
ACS Appl Mater Interfaces. 2022 Sep 21;14(37):42635-42644. doi: 10.1021/acsami.2c09439. Epub 2022 Sep 9.
In this work, a design concept of bioinspired functional surfaces is proposed for lubricant control at surfaces and interfaces subjected to external thermal gradients. Inspired by the conical structures of and the motion configuration of , a bioinspired surface of wedged-groove with an oriented capillary pattern is constructed. The effect of geometrical parameters on the directional lubricant manipulation capacity and sliding anisotropy is discussed. It is found that by regulating the orientation of the capillary pattern, a controllable lubricant self-transport capacity can be achieved for varying conditions from surfaces to interfaces, with or without thermal gradients. The lubricant self-transport process is captured, and the mechanism is revealed. The design philosophy of the proposed bioinspired functional surface is believed to have potential applications for lubricant control in modern machinery and complex liquid control in lab-on-a-chip and microfluidics devices.
在这项工作中，提出了一种受生物启发的功能表面设计概念，用于在承受外部热梯度的表面和界面处控制润滑剂。受[具体事物1]的锥形结构和[具体事物2]的运动构型启发，构建了具有定向毛细图案的楔形凹槽生物启发表面。讨论了几何参数对定向润滑剂操纵能力和滑动各向异性的影响。研究发现，通过调节毛细图案的方向，对于从表面到界面的各种条件，无论有无热梯度，都可以实现可控的润滑剂自运输能力。捕获了润滑剂自运输过程，并揭示了其机理。所提出的受生物启发的功能表面的设计理念被认为在现代机械中的润滑剂控制以及芯片实验室和微流控设备中的复杂液体控制方面具有潜在应用。
