Abstract A polypropylene sponge with hierarchical structure was prepared from a polypropylene solution by combination of micro particle template and the phase separation technique. A simple procedure was proved to be able to fabricate a unique sponge in which both submillimeter-sized holes (≈200 μm) and small macrospores (≈10 μm) are formed. The unique structure was successfully confirmed by scanning electron microscopy measurement. In addition, the sponge showed low density, high hydrophobicity, and superoleophilicity. The sponge exhibited good compressibility, and high performance for the adsorption-release of oils. The adsorbability was proved to be improved in a large scale due to the existence of holes. Furthermore, the sponge demonstrated the ability to remove oil-in-water emulsion. Based on the properties, the present sponge has promising prospects for environmental applications in the treatment of oily water.

中文翻译：

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用于油水处理的分层多孔海绵：通过颗粒模板和热致相分离方法的组合轻松制造

摘要 以聚丙烯溶液为原料，结合微粒模板和相分离技术，制备了一种具有分级结构的聚丙烯海绵。一个简单的程序被证明能够制造出一种独特的海绵，其中形成了亚毫米大小的孔 (≈200 μm) 和小大孢子 (≈10 μm)。通过扫描电子显微镜测量成功证实了这种独特的结构。此外，海绵表现出低密度、高疏水性和超亲油性。海绵表现出良好的压缩性和对油的吸附-释放性能。证明由于孔的存在，吸附能力得到了大规模的提高。此外，海绵表现出去除水包油乳液的能力。根据属性，