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首页> 外文期刊>RSC Advances >Facile fabrication of raspberry-like composite microspheres for the construction of superhydrophobic films and applications in highly efficient oil–water separation
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Facile fabrication of raspberry-like composite microspheres for the construction of superhydrophobic films and applications in highly efficient oil–water separation

机译：覆盆子状复合微球的快速制备，用于超疏水膜的构建及其在高效油水分离中的应用

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Inspired by the “lotus effect”, we proposed a facile synthetic route toward raspberry-like PS@SiO2 microspheres, which further lead to superhydrophobic surfaces. In this approach, monodispersed polystyrene (PS) microspheres were first synthesized via dispersion polymerization using polyvinylpyrrolidone (PVP) as stabilizer. The obtained PS microspheres were then used as template microspheres for biomimetic silification using tetraethyl orthosilicate (TEOS) as precursor. Upon adjusting the molecular weight of PVP and the concentration of NH3·H2O, the surface roughness of PS@SiO2 microspheres can be well controlled. Furthermore, after hydrophobization treatment, by drop-casting the raspberry-like PS@SiO2 microspheres onto a glass slide, dual-scale films were obtained, which had a similar surface morphology to that of the lotus leaf, exhibiting a water contact angle of 163.3° and water contact angle hysteresis of 4°. In addition, the oil–water separation ability of hydrophobic raspberry microsphere treated steel mesh was investigated. The results demonstrated excellent oil–water separation efficiency and reusability. This facile and robust synthesis technique for constructing a superhydrophobic surface hold great potential application in versatile and large-scale oil–water separation.
机译：受“莲花效应”的启发，我们提出了一条通向树莓状PS @ SiO 2 微球的合成路线，该路线进一步导致了超疏水性表面。在这种方法中，首先使用聚乙烯吡咯烷酮（PVP）作为稳定剂通过分散聚合 合成了单分散聚苯乙烯（PS）微球。然后将获得的PS微球用作模板微球，以原硅酸四乙酯（TEOS）为前体进行仿生硅化。调整PVP的分子量和NH 3 ·H 2 O的浓度后， PS @ SiO 2 微球可以很好地控制。此外，经过疏水化处理后，通过将树莓状的PS @ SiO 2 微球滴铸到载玻片上，得到了具有相似表面的双尺度薄膜。形态与荷叶形态相似，水接触角为163.3°，水接触角滞后为4°。此外，还研究了疏水性覆盆子微球处理的钢网的油水分离能力。结果表明，出色的油水分离效率和可重复使用性。这种用于构建超疏水表面的简便而强大的合成技术在多功能和大规模油水分离中具有巨大的潜在应用前景。

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