Abstract
Superhydrophobic and superoleophilic Ni foam was fabricated by immersion coating and drying method. The Ni foam was immersed in a mixture containing polytetratluoroethylene (PTFE) and hydrophobic fumed silica (R805). The mixture was dispersed in a poly(vinylidene fluoride) (PVDF) solution and the PVDF was used as a binder. The as-prepared Ni foam showed superhydrophobic and superoleophilic properties simultaneously and had a water contact angle (WCA) of 155° for water and an oil contact angle (OCA) of 0° for oil. The PTFE-coated Ni foam maintained high separation efficiency after repeated separations (40 times) above 96% for the more viscous olive oil/water mixture and above 99% for the hexane/water mixture. The as-prepared nickel foam proved to be an excellent candidate for the separation of oil and water mixtures.
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This project was supported by the Civil-Military Technology Cooperation Program and Agency for Defense Development of Korea.
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Eum, K.Y., Phiri, I., Kim, J.W. et al. Superhydrophobic and superoleophilic nickel foam for oil/water separation. Korean J. Chem. Eng. 36, 1313–1320 (2019). https://doi.org/10.1007/s11814-019-0308-9
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DOI: https://doi.org/10.1007/s11814-019-0308-9