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采用一步法制备Fe_3O_4@SiO_2纳米复合物,经疏水改性后,获得超顺磁性和超疏水性纳米复合材料。其饱和磁化强度为61.03emu/g,接触角为153.4°。对润滑油的吸附实验结果表明:对润滑油有较好的吸附能力,在30min内就可以达到吸附平衡,最大吸油量为1.40g/g;在pH为5~8范围内,该纳米复合材料呈现出较高的吸附容量;连续循环使用6次,其吸油量仍可达1.34g/g。可见,所制备的疏水型纳米Fe_3O_4@SiO_2复合材料是一种易回收和可循环使用的高效吸油材料。
The Fe_3O_4 @ SiO_2 nanocomposite was prepared by one-step method and was modified by hydrophobic method to obtain superparamagnetic and superhydrophobic nanocomposites. The saturation magnetization was 61.03 emu / g, and the contact angle was 153.4 °. The experimental results on the adsorption of lubricating oil showed that the adsorption capacity of the lubricating oil was good, and the adsorption equilibrium could be achieved within 30 min with a maximum oil absorption of 1.40 g / g. When the pH ranged from 5 to 8, the nanocomposite Showing a higher adsorption capacity; continuous use 6 times, the oil absorption is still up to 1.34g / g. It can be seen that the prepared hydrophobic nano-Fe 3 O 4 @ SiO 2 composite material is a highly efficient oil-absorbing material that is easily recyclable and recyclable.