| YU Xi-ting,GOU Xiao-dan,ZHANG Yan-zong.Preparation of Superhydrophilic and Underwater Superoleophobic Nickel-coating Material and Oil-Water Separation Performance[J],50(6):177-183 |
| Preparation of Superhydrophilic and Underwater Superoleophobic Nickel-coating Material and Oil-Water Separation Performance |
| Received:May 29, 2020 Revised:September 21, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2021.06.018 |
| KeyWord:one-step preparation electrodeposition method nickel coating micronanostructure superhydrophilic underwater superoleophobic |
| Author | Institution |
| YU Xi-ting |
School of Environment, Sichuan Agricultural University, Chengdu , China |
| GOU Xiao-dan |
School of Environment, Sichuan Agricultural University, Chengdu , China |
| ZHANG Yan-zong |
School of Environment, Sichuan Agricultural University, Chengdu , China |
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| Abstract: |
| In order to solve the problems of high cost, complicated preparation process and various kinds of reagent of oil-water separation materials, a new method is proposed to prepare superhydrophilic and underwater superoleophobic materials by one-step electrodeposition based on stainless steel mesh. In the process of electrodeposition, the surface of cathodic stainless steel mesh occurred reduction reaction and generated metal Ni. The parameters were further optimized by adjusting the time, current and temperature of preparation process and a rough stalactite-shaped micro/nano structure was formed on the cathodic surface. Contact angle measurement was used to determine contact angle. Scanning electron microscopy (SEM), energy- dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) were employed to investigate the morphology and chemical composition. The results showed that the condition is optimal when the current is 0.6 A, the time is 23 min, and the temperature is 50 ℃. Under these conditions, the oil contact angle (OCA) and the water contact angle (WCA) of the cathodic surface respectively reach 152°±3° and 0° and the material possesses superhydrophilic and underwater superoleophobic performance. During the oil-water separation experiment, the cathodic separation efficiency of n-hexane/water is the highest, which can reach 99.3% and maintain relatively stable during a test involving 20 cycles. Thus, the mesh exhibits high separation efficiency and good reusability in oil-water separation. The superhydrophilic and underwater superoleophobic nickel-coating prepared by the one-step electrochemical deposition method are efficient, durable with stable oil-water separation efficiency, having advantage of low cost, simple preparation process and few types of chemicals. |
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