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A free-standing superhydrophobic film for highly efficient removal of water from turbine oil

  • Fan Shu
  • Meng Wang
  • Jinbo Pang
  • Ping YuEmail author
Research Article

Abstract

A free-standing superhydrophobic film is prepared by sequentially dip-coating a commercially available filter paper with nano SiO2 suspension, epoxy emulsion, and octyltrimethoxysilane solution. A surface with micro- or nano-roughness is formed because SiO2 nanoparticles are uniformly and firmly adhered on the backbone of the filter paper by the cured epoxy resin. Furthermore, the surface energy is significantly reduced because of introducing octytrimethoxysilane. Such a surface structure makes the prepared film a superhydrophobic material. Due to its free-standing nature, this superhydrophobic film can be used to remove water from turbine oil by filtration. The efficiency of water removal is high (up to 94.1%), and the filtration process is driven solely by gravity without extra energy consumption. Because of the facile fabrication process and the high efficiency of water removal, this free-standing superhydrophobic film may find application in power industry.

Keywords

superhydrophobicity nanoparticles dip coating epoxy emulsion turbine oil 

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Notes

Acknowledgements

This work is supported by Yunnan power grid Co., Ltd.

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Copyright information

© Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.College of Chemistry and Molecular SciencesWuhan UniversityWuhanChina
  2. 2.Institute for Advanced Interdisciplinary Research (iAIR)University of JinanJinanChina

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