| 摘要: |
| 针对目前油水分离方法分离效率低、重复利用率低、二次污染环境等问题,开展了疏水三维多孔油水分离材料的研究。 以泡沫镍为基底材料,通过水热法构造多级微纳复合结构表面和氟硅烷疏水化处理得到超疏水泡沫镍。 利用扫描电子显微镜、能谱仪、X-射线衍射仪和全反射傅里叶变换红外光谱仪、接触角测量仪表征其表面形貌、成分和疏水性能,测试改性泡沫镍的油水分离性能和重复利用率。 结果表明:在泡沫镍表面成功制备出“鸟巢状”垂直排列的 Ni(OH)2纳米片阵列,并形成局部“团簇状”凸起,协同泡沫镍本身微米级孔骨架构成多级微纳米粗糙结构,具有低表面能的氟硅烷成功组装在多级微纳结构表面,实现了优异的超疏水性能。 改性泡沫镍可实现对甲苯、氯仿、正己烷与水的混合物吸附分离,且具有良好的循环使用性。 制备的超疏水泡沫镍可在磁场控制下实现对油水混合物的分离,是一种高效、智能的油水分离三维多孔材料。 |
| 关键词: 泡沫镍 超疏水 油水分离 水热法 |
| DOI：10.11933/j.issn.1007-9289.20210824002 |
| 分类号:TG178 |
| 基金项目:北京市自然科学基金资助项目(2182017, 2202017) |
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| Preparation of Superhydrophobic Nickel Foam and Its Oil-water Separation Performance |
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WEI Kai1, ZHANG You1, WANG Jupin1, PAN Feng2, ZHAO Yao1, CHEN Fei1
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1.College of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology,Beijing 102617 , China;2.Shanghai Institute of Special Equipment Inspection and Technical Research, Shanghai 200062 , China
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| Abstract: |
| In order to solve the problems of low separation efficiency, low reuse rate and secondary pollution of current oil-water separation methods, a hydrophobic three-dimensional porous material for oil-water separation purpose is developed. The Ni foam surface is treated by the hydrothermal method to construct the hierarchical micro-nano structures. The treated Ni foam is subsequently modified by the fluoro-silane to obtain superhydrophobicity. The surface morphology and composition of the modified nickel foams are characterized by scanning electron microscope, energy dispersive spectrometer, X-ray diffractometer, and Fourier transform infrared spectrometer. The wettability properties of the surface are tested by the contact angle measurement. The oil-water separation performance and the repeatability of the modified Ni foams are measured. Results show that a “ nest” vertical array of Ni ( OH)2 nanosheets and partial “cluster” bulges are formed on the surface of Ni foams. The hierarchical nano-micro structure is obtained by the nanostructure of Ni(OH)2 nanosheets and the micro-pore skeleton of Ni foams. The fluoro-silane with low surface energy is successfully assembled on the surface to achieve excellent superhydrophobicity. The modified nickel foam can realize the adsorption separation of toluene, chloroform, n-hexane, and water mixtures with good recyclability. Moreover, the superhydrophobic Ni foam can realize the oil / water separation under the magnetic field’s control due to the magnetic properties of Ni foams. The superhydrophobic nickel foam can separate oil and water from their mixtures under control of the magnetic field. The superhydrophobic Ni foam is an efficient and intelligent three-dimensional porous material for oil-water separation. |
| Key words: nickel foam superhydrophobicity oil-water separation hydrothermal method |
