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RISS 인기검색어
- 검색키워드
- 저자 : Mengying Qiao (검색결과 2 건)
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Binbin Zhang,Mengying Qiao,Weichen Xu,Baorong Hou 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-
Water-repellent and interfacial non-wetting superhydrophobicity has great potential to addresscorrosion/icing-induced material-deterioration problems. Herein, an all-organic superhydrophobic coatingwas constructed using facile and substrate-independent spray-coating method based on PTFE andPDMS. FE-SEM, EDS, and XPS techniques were used to analyze the surface topographies and chemicalcompositions. The coating exhibits superior anti-fouling and self-cleaning properties against various liquidand solid contaminants due to the synergic effect of low surface energy and hierarchical structures. The EIS and potentiodynamic polarization results show improved charge transfer resistance (Rct), positiveshifted corrosion potential (Ecorr), and decreased corrosion current density (Icorr), implying significantlyenhanced anti-corrosion performance with 99.83 % inhibition efficiency. Besides, the delay rate of icefreezingtime of the coating is 232 % at 5C, 137 % at 10 C and 204 % at 15 C compared withuncoated Q235 substrate respectively. The ice adhesion strength of the coating accounts for only6.55 % at 5C, 7.03 % at 10 C and 9.35 % at 15 C than that of the bare Q235 carbon steel, demonstratingultra-low ice adhesion force and anti-icing capabilities. The hygroscopic and deliquesce behaviorsof NaCl salt particles reveal an intriguing salt-deliquescence self-coalescence phenomenon andprospective anti-corrosion mechanism for superhydrophobic materials in high-humidity marine atmosphericenvironments.
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Binbin Zhang,Mengying Qiao,Guojun Ji,Baorong Hou 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.119 No.-
Due to their unique interface functions, superhydrophobic materials have a wide range of applications. However, the majority of current superhydrophobic surfaces are designed and manufactured using fluorinatedchemical reagents. Moreover, high temperature water droplets with lower surface tension easilypinning to the surface, resulting in interfacial property failures. To overcome these deficiencies, herein wefabricated a superhydrophobic bilayer coating on Q235 carbon steel based on fluorine-free chemicals ofpolydimethylsiloxane (PDMS) and hexadecyltrimethoxysilane modified aluminum oxide nanoparticles(Al2O3@HDTMS). Field-emission scanning electron microscopy (FE-SEM), Energy dispersive spectroscopy(EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Contactangle meter, and Electrochemical impedance spectroscopy (EIS) techniques were utilized to characterizethe constructed superhydrophobic bilayer coating. The results show that the superhydrophobic bilayercoating exhibits non-wetting, anti-fouling and self-cleaning capacities towards various solid and liquidpollutants. The superhydrophobic bilayer coating possesses superior anti-corrosion and weather resistingproperties with |Z|0.01Hz and Rct values increased by more than eight orders of magnitude, withstanding720 h accelerated salt-spray and 50 days outdoor atmospheric corrosion attack. Furthermore, the superhydrophobicbilayer coating features super-repellency towards water droplets in a wide temperaturerange (30 90 C) and accompanied with high mechanical stability against continuous sandpaper abrasionand tape-peeling cycles.
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