Feng Rui, Xu Chen, Song Fei, Wang Fang, Wang Xiu-Li, Wang Yu-Zhong
The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China.
ACS Appl Mater Interfaces. 2020 Mar 11;12(10):12373-12381. doi: 10.1021/acsami.0c00234. Epub 2020 Feb 25.
Inspired by pitcher plants, slippery liquid-infused porous surfaces (SLIPS) have recently attracted increasing attention for directional transport and movement manipulation of water droplets. Nevertheless, infused lubricants are generally instable and easy to deviate from such surfaces during applications, resulting in the lost control on the fog capture and motion of droplets as well as serious risk of water safety. Here, a highly stable SLIPS with improved lubricant storage is developed through the structure design of synergistically constructing regular micro-pincushion and nanoparticles. Notably, on the basis of the microstructure, the presence of nano-architecture shows great contribution to obviously increased capillary force as well as suppressed lubricant loss during water collection. Featuring the stable surface-slippery property, the biomimetic SLIPS displays well maintained dropwise coalescence of water from fog and efficient water harvesting performance. The water collection efficiency is as high as 852 mg cm h and is stable within continuous 20 h application. This fundamental illustration of structural synergism can be further applied to construct more new water manipulation and harvesting platforms with stably slippery surfaces/interfaces.
受猪笼草的启发，注入滑液的多孔表面（SLIPS）最近在水滴的定向传输和运动控制方面引起了越来越多的关注。然而，注入的润滑剂通常不稳定，在应用过程中容易从这种表面偏离，导致对雾滴捕获和运动的控制丧失以及严重的水安全风险。在此，通过协同构建规则微针垫和纳米颗粒的结构设计，开发了一种具有改进润滑剂储存的高度稳定的SLIPS。值得注意的是，在微观结构的基础上，纳米结构的存在对明显增加的毛细力以及在集水过程中抑制润滑剂损失有很大贡献。具有稳定的表面滑爽特性，仿生SLIPS表现出良好的雾滴逐滴聚结和高效的集水性能。集水效率高达852 mg cm h，在连续20小时的应用中保持稳定。这种结构协同作用的基本例证可进一步应用于构建更多具有稳定滑爽表面/界面的新型水操纵和集水平台。
