Preparation and oil absorption properties of magnetic melamine sponge

[摘要] The magnetic melamine sponge (MS-Fe3O4) with magnetic response and high hydrophobicity was fabricated by two-step method. First, the magnetic nano-particles were fixed on the skeleton of melamine sponge (MS) using 3-hydroxytyramine hydrochloride and 1-dodecanethiol, then hydrophobicity modified with octadecyltrichlorosilane (OTS). The structures and chemical compositions of MS and MS-Fe3O4were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The wettability of the sample was obtained by using contact angle analysis system. MS-Fe3O4endowed with outstanding selectivity and excellent oil absorption capacities, which can be widely used in absorbing various sorts of oil. The oil absorption capacities for crude oil, diesel oil, lubricating oil, soybean oil and peanut oil were 71g/g, 51g/g, 62g/g, 54g/g, 57g/g. In addition, MS-Fe3O4showed excellent recyclability which can be forecasted as an ideal candidate for oil-water separation.

[发布机构] College of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin; 300384, China^1;School of Physics, Southeast University, Nanjing; 211189, China^2

[关键词] Chemical compositions;Contact angle analysis;Fourier transform infra red (FTIR) spectroscopy;Magnetic nano-particles;Magnetic response;Octadecyltrichlorosilane;Oil absorption capacity;Oil water separation