Abstract
Aiming at the problems of low separation efficiency, low reusability and secondary pollution of the current oil-water separation methods, researches on hydrophobic three-dimensional porous oil-water separation materials were carried out. Using foamed nickel as the base material, the surface of the multi-level micro-nano composite structure was constructed by the hydrothermal method and the superhydrophobic nickel foam was obtained by hydrophobic treatment with fluorosilane. Scanning electron microscope, energy dispersive spectrometer, X-ray diffractometer, total reflection Fourier transform infrared spectrometer, contact angle measuring instrument were used to characterize its surface morphology, composition and hydrophobicity, and the oil-water separation performance and repeatability of modified nickel foam were tested. utilization. The results show that "bird's nest" vertically aligned Ni(OH) 2 was successfully prepared on the surface of nickel foam. The nanosheet arrays, and local "cluster-like" protrusions are formed, which cooperate with the micron-scale pore skeleton of the nickel foam to form a multi-level micro-nano rough structure. Excellent superhydrophobic properties. The modified nickel foam can realize the adsorption and separation of the mixture of p-toluene, chloroform, n-hexane and water, and has good recyclability. The prepared superhydrophobic nickel foam can realize the separation of oil-water mixture under the control of magnetic field, which is an efficient and intelligent three-dimensional porous material for oil-water separation.