研究目的
To fabricate a highly flexible and mechanically robust superhydrophobic F-SiO2@PDMS coating for self-cleaning and drag-reduction applications.
研究成果
The superhydrophobic F-SiO2@PDMS coating exhibits excellent water-repellency, high flexibility, and mechanical robustness, making it suitable for self-cleaning and drag-reduction applications. The coating's durability in harsh environments and its independence from substrate materials highlight its potential for widespread use.
研究不足
The study focuses on the fabrication and initial testing of the superhydrophobic coating. Long-term durability under extreme conditions and scalability for industrial applications were not extensively explored.
1:Experimental Design and Method Selection:
A facile layer-by-layer spraying strategy was employed to fabricate the superhydrophobic F-SiO2@PDMS coating. PDMS was used as a binder to immobilize F-SiO2 nanoparticles and improve adhesion to substrates.
2:Sample Selection and Data Sources:
Silica nanoparticles of different sizes (7 nm, 20 nm, 50 nm) were modified with PFDTES to create F-SiO2 nanoparticles. Various substrates including aluminum sheet, wood brick, and release cloth were used.
3:List of Experimental Equipment and Materials:
Materials included silica nanoparticles, PFDTES, PDMS prepolymer, and various solvents. Equipment included an airbrush for spraying, FE-SEM for morphology analysis, and optical contact angle measuring instrument for wettability tests.
4:Experimental Procedures and Operational Workflow:
The process involved modification of SiO2 nanoparticles, fabrication of the superhydrophobic coating via spraying, and curing. Wettability, mechanical robustness, and durability tests were conducted.
5:Data Analysis Methods:
Wettability was assessed through contact angle and sliding angle measurements. Mechanical robustness was evaluated via abrasion and elongation tests. Durability was tested in various pH environments.
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Polydimethylsiloxane
Sylgard 184 silicone elastomer kit
Dow Corning Co., Ltd
Serve as a binder to immobilize F-SiO2 nanoparticles and improve adhesion to substrates
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Field-emission scanning electron microscope
Hitachi S4800
Hitachi
Morphology analysis of the coatings
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Silica nanoparticles
AEROSIL 380
Evonik Degussa Co., Ltd
Induce rough microscopic structures and reduce surface energy
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Silica nanoparticles
99.0%
Nanjing XFNANO Materials Tech Co., Ltd
Induce rough microscopic structures and reduce surface energy
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Silica nanoparticles
99.5%
Shanghai Macklin Biochemical Co., Ltd
Induce rough microscopic structures and reduce surface energy
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1H,1H,2H,2H-perfluorodecyltriethoxysilane
PFDTES, 96%
Shanghai Macklin Biochemical Co., Ltd
Modify silica nanoparticles to reduce surface energy
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Optical contact angle measuring instrument
JC2000D2
Shanghai Zhongchen Digital Technology Apparatus Co., Ltd
Measure water contact angle and sliding angle
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