基于岩棉的超亲水/水下疏油过滤材料的制备及在油水分离中的应用

文章以岩棉为基质，通过一步光引发聚合方法在岩棉纤维表面引入亲水性聚丙烯酰胺，成功制备了油水分离材料。聚丙烯酰胺改性后的岩棉为超亲水/水下超疏油性质，可以有效分离汽油、植物油等各种油品与水的混合物。分离过程中，分离效率在97%以上，分离通量超过 $ 15\times10^{3}\ \mathrm{L}/(\mathrm{m}^{2}\cdot\mathrm{h}) $。考虑到高效率、低价格以及易制备等特点，基于岩棉的该过滤材料在现实中的油水分离领域具有广阔的应用前景。

In this study, rock wool was used as the substrate, and polyacrylamide was grafted on the surface of rock wool fiber by light-initiated polymerization to prepare oil-water separation material. The modified rock wool showed super-hydrophilic/underwater oleophobic property, which could effectively separate water mixtures with various oil, such as gasoline and vegetable oil. The separation efficiency was over 97% and the separation flux was beyond $ 15 \times 10^{3} \mathrm{~L}/(\mathrm{m}^{2} \cdot \mathrm{h}) $. Considering the high efficiency, low costs, and easy preparation, this kind of filter based on rock wool has great potential in broad applications in oil-water separation.