Lubricant-impregnated surfaces are two-component surface coatings. One component, a fluid called the lubricant, is stabilized at a surface by the second component, the scaffold. The scaffold can either be a rough solid or a polymeric network. Drops immiscible with the lubricant, hardly pin on these surfaces. Lubricant-impregnated surfaces have been proposed as candidates for various applications, such as self-cleaning, anti-fouling, and anti-icing. The proposed applications rely on the presence of enough lubricant within the scaffold. Therefore, the quality and functionality of a surface coating are, to a large degree, given by the extent to which it prevents lubricant-depletion. This review summarizes the current findings on lubricant-depletion, lubricant-replenishment, and the resulting understanding of both processes. A multitude of different mechanisms can cause the depletion of lubricant. Lubricant can be taken along by single drops or be sheared off by liquid flowing across. Nano-interstices and scaffolds showing good chemical compatibility with the lubricant can greatly delay lubricant depletion. Often, depletion of lubricant cannot be avoided under dynamic conditions, which warrants lubricant-replenishment strategies. The strategies to replenish lubricant are presented and range from spraying or stimuli-responsive release to built-in reservoirs.

浸有润滑剂的表面是两组分表面涂层。一种成分，称为润滑剂的流体，通过第二种成分，即脚手架，稳定在表面上。支架可以是粗糙的固体或聚合物网络。与润滑剂不混溶的液滴，几乎不固定在这些表面上。已经提出了润滑剂浸渍的表面作为各种应用的候选物，例如自清洁，防污和防结冰。所提出的应用依赖于支架内是否存在足够的润滑剂。因此，表面涂层的质量和功能在很大程度上取决于其防止润滑剂消耗的程度。这篇综述总结了关于润滑剂消耗，润滑剂补充的当前发现，以及对这两个过程的理解。多种不同的机制会导致润滑剂耗尽。润滑剂可以被一滴滴带走，也可以被流过的液体剪掉。显示出与润滑剂良好的化学相容性的纳米间隙和支架可以大大延迟润滑剂的消耗。通常，在动态条件下无法避免润滑剂的消耗，这需要采取润滑剂补充策略。提出了补充润滑剂的策略，范围从喷涂或刺激响应释放到内置储油罐。在动态条件下无法避免润滑剂的消耗，这需要采取润滑剂补充策略。提出了补充润滑剂的策略，范围从喷洒或刺激性释放到内置油箱。在动态条件下无法避免润滑剂的消耗，这需要采取润滑剂补充策略。提出了补充润滑剂的策略，范围从喷洒或刺激性释放到内置储油罐。