To improve the stability of superhydrophobic coatings,the construction of excellent interfaces is the key.This work adopted the strategy of optimizing the interface structure and prepared a silane coupling agent-modified SiO2 nanoparticles (KH570-SiO2),which could not only disperse well in PDMS dispersion solution,but also form covalently bonds with PDMS chain.Then,a modified SiO2/PDMS superhydrophobic coating was constructed on the glass surface by spraying method and fully cured.The morphology,microstructure,and surface characteristics of the modified SiO2/PDMS coating were investigated by scanning electron microscope (SEM),Fourier transform infrared spectroscopy (FT-IR),contact angle measuring instrument (CA) and so on.The mechanical stability of the SiO2/PDMS coating was evaluated by the experiments of marking,sandpaper wear and tape stripping.Finally,the stability mechanism of the coating was discussed.The results indicated that the modified SiO2/PDMS coating exhibited excellent superhydrophobicity and mechanical stability.This study provided a new method for constructing stable superhydrophobic coatings on the surface of materials,which was expected to expand the application of materials in self-cleaning,anticorrosive coating,pipeline transportation,oil-water separation and other fields.
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基金资助
国家自然科学基金(22175057);河南科技大学SRTP项目(2022195)
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