The hierarchically-micro/nanoscale rough surface structure and the high surface hydrophilicity are two necessary factors to construct the superhydrophilic-underwater superoleophobic materials for oil-water separation. In this work, an effective method on the fabrication of the superhydrophilic-underwater superoleophobic sponges was developed, in which the mixture of the Fe 3 O 4 nanoparticles or (and) the SiO 2 nanoparticles, the chitosan, the polyvinyl alcohol, and the glutaraldehyde was coated on the polymeric sponge by dip-coating to obtain the surface-modified sponges possessing the rough superhydrophilic-underwater superoleophobic surface. The structure of the surface-modified sponges were investigated by TGA, FTIR, WAXD, XPS, SEM, two-dimensional EDS element mapping as well as VSM, and the underwater superoleophobicity of the surface-modified sponges was proved by CH 2 Cl 2 contact angle measurement. Furthermore, the resultan...

中文翻译：

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有效制备超亲水-水下超疏油纳米颗粒/聚合物海绵用于油水分离

分层的微米/纳米级粗糙表面结构和高表面亲水性是构造用于油水分离的超亲水-水下超疏油材料的两个必要因素。在这项工作中，开发了一种制备超亲水-水下超疏油海绵的有效方法，其中Fe 3 O 4纳米颗粒或（和）SiO 2纳米颗粒，壳聚糖，聚乙烯醇和戊二醛的混合物将其通过浸涂法涂覆在聚合物海绵上，以获得具有粗糙的超亲水-水下超疏油表面的表面改性的海绵。通过TGA，FTIR，WAXD，XPS，SEM，二维EDS元素映射以及VSM研究了表面改性海绵的结构，并通过CH 2 Cl 2接触角的测量证明了表面改性海绵的水下超疏油性。此外，结果