A free-standing superhydrophobic film for highly efficient removal of water from turbine oil
Fan Shu1, Meng Wang1, Jinbo Pang2, Ping Yu1()
1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China 2. Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Jinan 250022, China
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.
. [J]. Frontiers of Chemical Science and Engineering, 2019, 13(2): 393-399.
Fan Shu, Meng Wang, Jinbo Pang, Ping Yu. A free-standing superhydrophobic film for highly efficient removal of water from turbine oil. Front. Chem. Sci. Eng., 2019, 13(2): 393-399.
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