Lim, Yong Taek Han, Nara Jang, Wooree Jung, Wooyoung Oh, Min Han, Seung Whan Koo, Hye Young Choi, Won San 2024-01-20T01:00:33Z 2024-01-20T01:00:33Z 2021-09-05 2017-08-15 0743-7463 https://pubs.kist.re.kr/handle/201004/122410 A convection heat treatment that can replace existing chemical oxidation methods was developed for the preparation of hierarchically oxidized Cu meshes with various surface morphologies, representing a very simple and green route that does not involve toxic chemicals. Three types of Cu meshes [bumpy-like (BL) and short and long needle-like (NL) structures] exhibited similar separation efficiencies of 95-99% over 20 separation cycles, as indicated by their similar water contact angles (WCAs; 147-150 degrees). However, these Cu meshes exhibited different flux behaviors. Excessively rough and excessively smooth surfaces of the Cu mesh resulted in increased resistance to flow and to a decrease of the penetration of oil. A surface with intermediate smoothness, such as the BL-Cu mesh, was necessary for high flux over a broad range of oil viscosities. Furthermore, a less rough surface was more suitable for the separation of highly-viscous oil. Computational fluid dynamics (CFD) simulations were carried out to support our experimental results. The BL-Cu meshes also showed outstanding mechanical stability because of their low resistance to the flow of fluids. English AMER CHEMICAL SOC OIL-WATER SEPARATION COPPER MESHES SPILL CLEANUP FILTER-PAPER PURIFICATION ABSORPTION REMOVAL COLLECTION SPONGES DEVICE Surface Design of Separators for Oil/Water Separation with High Separation Capacity and Mechanical Stability Article 10.1021/acs.langmuir.7b01800 1 LANGMUIR, v.33, no.32, pp.8012 - 8022 LANGMUIR 33 32 8012 8022 scie scopus 000407987800020 2-s2.0-85027464052 Chemistry, Multidisciplinary Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article OIL-WATER SEPARATION COPPER MESHES SPILL CLEANUP FILTER-PAPER PURIFICATION ABSORPTION REMOVAL COLLECTION SPONGES DEVICE