 3D materials with switchable wedding surfaces have attracted significant attention due to their application in oil-slash-water separation, and a fast pH-responsive melamine foam grafted with poly, 2-dimethylaminoethyl methacrylate, has been prepared by surface-initiated chain transfer radical polymerization. The AS-prepared MF displays superhydrophilic and superoleophobic surfaces in strong acid solution, while it becomes superhydrophobic in neutral or basic solution. It can selectively absorb different types of oils from the oil-water mixture with a great absorption capacity of 54 to 117 gG-1 and automatically door-boil in less than 60 s with a desorption efficiency of 99% dichloromethane in acid solution. The pH-sensitive MF with switchable wedding surfaces has great potential for oily water separation and possesses excellent recyclability. This article was authored by Joon Joon Ma, Yang Chun Sia, Tao Yang, and others. We are article.tv, links in the description below.