Search

Inspired by the natural superhydrophobic surfaces with various colors such as the lotus leaves and the wings of butterflies, we report a one‐step method to fabricate superhydrophobic coatings by the combination of kaolin, acrylic color and organosiloxanes. The coatings were characterized using X‐ray photoelectron spectroscopy, scanning electron microscopy, and other analytical techniques. Different from the previously reported method, kaolin particles were introduced to generate rough hierarchical structures on the coating surface, followed by acrylic color decoration and organosiloxanes modification. The colorful superhydrophobic coatings can be constructed in various substrates, such as glass slide, filter paper, and fabric. Furthermore, the obtained coating maintained excellent mechanical durability, chemical stability, and the high‐efficiency of oil–water separation. All of the colorful coatings showed superhydrophobicity in air, and they retained water repellency even after exposed to ultraviolet or under harsh conditions. The results also indicated that the as‐prepared coatings possessed outstanding fungi‐resistance. The colorful superhydrophobic fabric can be used to separate oil/water mixtures, and the separation efficiencies are as high as 95%. We envision that the colorful superhydrophobic coatings with durability and chemical stability may be useful in various fields, such as house decoration, paint coating, antimicrobial material and oil/water separation. [ABSTRACT FROM AUTHOR]

High flux superwetting material has reverse wettability to oil or water phase, which plays an important part in oil–water separation and is one of the current research hotspots. Herein, we reported a ZIF-67@Cu(OH)2 nanowire array-coated metal mesh prepared using self-assembly and chemical oxidation method. These freshly prepared copper meshes with micro-/nanosecondary rough structure exhibit excellent underwater superoleophobicity and superhydrophilicity. Thus, the as-prepared mesh membrane has an excellent separation capability and can be used for oil–water separation. It shows extremely high efficiency oil–water separation function (99%), excellent cycling ability and high permeation flux (23,854 L m−2 h−1) in several typical oil–water separation processes. The mesh membrane also shows excellent underwater superoleophobicity in different pH values conditions. Besides, the as-prepared mesh membrane shows excellent durability and stability. Consequently, this work provides an economical and effective method for modification on metal substrate to prepare a underwater superoleophobicity/superhydrophilicity material to realize efficient separation of oil–water mixtures. [ABSTRACT FROM AUTHOR]