Graphene and its functionalization are still one of the most prominent two-dimensional crystals. In recent years, the wetting properties of graphene for water (i.e., its hydrophobic, hydrophilic, and also icophobic features) were controversially discussed as well as water intercalation and confined water, that have unusual characteristics. The dispute about wetting properties was originally based on contact angle (/engineering) measurements conducted at ambient pressure. In the meanwhile, detailed ultra-high vacuum (UHV) surface science works and theoretical studies are available. This brief review describes the current knowledge available in the literature about the water/graphene system as well as our own work using experimental UHV surface science techniques. The review starts with a definition of hydrophobicity and briefly touches on a possible correlation with icephobicity as well as discusses briefly confined water. Next, theoretical studies are reviewed, and finally, experimental works are described on which the review focusses. Finally, a brief outlook section discusses water adsorption on functionalized graphene.

石墨烯及其功能化仍然是最突出的二维晶体之一。近年来，关于石墨烯对水的润湿特性（即其疏水性，亲水性和疏油性）以及具有非同寻常特征的水嵌入和承压水一直受到争议。关于润湿性能的争议最初是基于在环境压力下进行的接触角（/工程）测量。同时，可以进行详细的超高真空（UHV）表面科学工作和理论研究。这篇简短的评论介绍了有关水/石墨烯系统的现有文献知识，以及我们使用超高压表面科学技术进行的研究。审查从疏水性的定义开始，简要介绍了与疏冰性的可能关系，并简要讨论了承压水。接下来，对理论研究进行了综述，最后，描述了综述所关注的实验工作。最后，一个简短的展望部分讨论了水在功能化石墨烯上的吸附。